Alexander Stahl, Michael Kewming, John Goold, Janine Hilder, Ulrich G. Poschinger, Ferdinand Schmidt-Kaler, Demonstration of energy extraction gain from non-classical correlations, arXiv:2404.14838

Maurizio Verde, Ansgar Schaefer, Benjamin Zenz, Zyad Shehata, Stefan Richter, Christian T. Schmiegelow, Joachim von Zanthier, Ferdinand Schmidt-Kaler, Spin-selective coherent light scattering from ion crystals, arxiv:2404.12513

Oksana Chelpanova, Shane P. Kelly, Ferdinand Schmidt-Kaler, Giovanna Morigi, Jamir Marino
Dynamics of quantum discommensurations in the Frenkel-Kontorova chain, accepted for publication in PRB (2024), arXiv:2401.12614

F. KreppelCh. MelzerJ. WagnerJ. HilderU. PoschingerF. Schmidt-KalerA. Brinkmann
Quantum Circuit Compiler for a Shuttling-Based Trapped-Ion Quantum Computer, Quantum 7, 1176 (2023)arXiv:2207.01964

J. Durandau, J. Wagner, F. Mailhot, C. Brunet, F. Schmidt-Kaler, U. Poschinger, Y. Bérubé-Lauzière, Automated Generation of Shuttling Sequences for a Linear Segmented Ion Trap Quantum Computer, Quantum 7, 1175 (2023), arxiv:2208.04881


S. Kelly, U. Poschinger, F. Schmidt-Kaler, M. Fisher, J. Marino, Coherence requirements for quantum communication from hybrid circuit dynamics, SciPost Phys. 15, 250 (2023) , arXiv: 2210.11547

P. Adrich et al., GBAR Collaboration, Production of antihydrogen atoms by 6 keV antiprotons through a positronium cloud, Eur. Phys. J. C 83, 1004 (2023), arxiv2306.15801, pdf, see also the CERN news

O. Chelpanova, S. Kelly, G. Morigi, F. Schmidt-Kaler, J. Marino, Injection and nucleation of topological defects in the quench dynamics of the Frenkel-Kontorova model, Euro. Phys. Lett. (accepted 2023), arXiv: 2210.14904

M. Verde, C. T. Schmiegelow, U. Poschinger, F. Schmidt-Kaler Trapped atoms in spatially-structured vector light fields, Sci Rep 13, 21283 (2023), see also the mathematica notebook

F. Schmidt-Kaler, J. von Zanthier, Collective Light emission of ion crystals in correlated Dicke states (PDF), in Photonic Quantum Technologies - Science and Applications, ISBN: 978-3-527-41412-3
Wiley-VCH, Berlin, Benyoucef, Mohamed (editor)

S. Richter, S. Wolf, J. von Zanthier, F. Schmidt-Kaler, Collective photon emission patterns from two atoms in free space, Phys. Rev. Research 5, 013163 (2023)

Marie Niederländer, Jonas Vogel, Alexander Schulze-Makuch, Bastien Gély, Arezoo Mokhberi, Ferdinand Schmidt-Kaler, Rydberg ions in coherent motional states: A new method for determining the polarizability of Rydberg ions, NJP 25 033020 (2023)


F. Stopp, M. Verde, M. Katz, M. Drechsler, Ch. T. Schmiegelow, F. Schmidt-Kaler, Coherent transfer of the transverse momentum of an optical vortex beam to the motion of a single trapped ion, Phys. Rev. Lett.129, 263603 (2022)

M. Gajewski, W. Le, S. Wolf,  Ch. Düllmann, D. Budker, G. Morigi, F. Schmidt-Kaler
Fluorescence calorimetry of an ion crystal, Phys. Rev. A 106, 033108 (2022)

O. Onishchenko, G. Guarnieri, P. Rosillo-Rodes, D. Pijn, J. Hilder, U. G. Poschinger, M. Perarnau-Llobet, J. Eisert, F. Schmidt-Kaler, Probing coherent quantum thermodynamics using a trapped ion,  arXiv:2207.14325 (accepted for publication)

P. Blumer et al., (GBAR coll.) Positron accumulation in the GBAR experiment, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 167263 (2022) arXiv: 2205.04530 

Wenbing Le, Sebastian Wolf,  Lukas Klein, Christoph Düllmann, Dmitry Budker, Ferdinand Schmidt-Kaler
Robust Polarization Gradient Cooling of Trapped Ions, New J. Phys. 24, 043028 (2022), arXiv:2109.00575

D. Pijn, O. Onishchenko, J. Hilder, U. Poschinger, F. Schmidt-Kaler, R. Uzdin,
Detecting heat leaks with trapped ion qubits, Phys. Rev. Lett. 128 110601 (2022), feature, arXiv:2110.03277

Dmitry Budker, Peter W. Graham, Harikrishnan Ramani, Ferdinand Schmidt-Kaler, Christian Smorra, Stefan Ulmer,
Millicharged dark matter detection with ion traps, Phys. Rev. X Quantum 3, 010330 (2022)

J.Hilder, D. Pijn, O. Onishchenko, A. Stahl, M. Orth, B. Lekitsch, A. Rodriguez-Blanco, M. Müller, F. Schmidt-Kaler, U. Poschinger,
Fault-tolerant parity readout on a shuttling-based trapped-ion quantum computer, Phys. Rev. X.12.011032 (2022)

Felix Stopp, Henri Lehec, Ferdinand Schmidt-Kaler
A Deterministic Single Ion Fountain, Quantum Sci. Technol.7 034002 (2022), arXiv:2108.06948 , see also related article This Simple Experiment Could Challenge Standard Quantum Theory in Scientific American Oct. (2021) by Anil Ananthaswamy


J. Andrijauskas, J. Vogel, A. Mokhberi, F. Schmidt-Kaler,
Precision measurement of the ionization energy of a single trapped 40Ca+ ion by Rydberg series excitation, Phys. Rev. Lett. 127, 203001 (2021)

Martin Drechsler, Sebastian Wolf, Christian T. Schmiegelow, F. Schmidt-Kaler
Optical super-resolution sensing of a trapped ion's wave packet size, Phys Rev Lett 127, 143602 (2021)

F. Stopp, L. Ortiz-Gutiérrez, H. Lehec, F. Schmidt-Kaler
Single Ion Thermal Wave Packet Analyzed Via Time-Of-Flight Detection, New Jour. Phys. 23, 063002 (2021), arXiv:2102.12047

K. Groot-Berning, G. Jacob, C. Osterkamp, F. Jelezko, F. Schmidt-Kaler
Fabrication of 15NV− centers in diamond using a deterministic single ion implanter, New Jour. Phys. 23 063067 (2021), pdf

S. Richter, S. Wolf, J. von Zanthier, F. Schmidt-Kaler,
Imaging trapped ion structures via fluorescence cross-correlation detection
Phys. Rev. Lett. 126, 173602 (2021)

A. Husson et. al. (GBAR collaboration)
A pulsed high-voltage decelerator system to deliver low-energy antiprotons
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 1002 165245 (2021)

M. Charlton et. al. (GBAR collaboration)
Positron production using a 9 MeV electron linac for the GBAR experiment
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 985 164657 (2021), arXiv: 2006.05966

R. F. H. J. van der Beek, O. Onishchenko, W. Vassen, K. S. E. Eikema, and H. L. Bethlem,
Bloch oscillations with a metastable helium Bose-Einstein condensate,
Phys. Rev. A 102, 061302(R) (2021)


G. Quinteiro, Ch. Schmiegelow, F. Schmidt-Kaler,
The paraxial approximation fails to describe the interaction of atoms with general vortex light fields

A. Mokhberi, M. Hennrich, F. Schmidt-Kaler,
Trapped Rydberg ions: a new platform for quantum information processing
Advances In Atomic, Molecular, and Optical Physics, Academic Press, Ch. 4, 69 (2020), arXiv:2003.08891

V. Kaushal, B. Lekitsch, A. Stahl, J. Hilder, D. Pijn, C. Schmiegelow, A. Bermudez, M. Müller, F. Schmidt-Kaler, U. Poschinger
Shuttling-Based Trapped-Ion Quantum Information Processing,
AVS Quantum Sci. 2, 014101 (2020)


M. Salz, Y. Herrmann, A. Nadarajah, A. Stahl, M. Hettrich, A. Stacey, S. Prawer, D. Hunger, F. Schmidt-Kaler,
Cryogenic platform for coupling color centers in diamond membranes to a fiberbased microcavity, Appl. Phys. B 126, 131 (2020), arXiv:2002.08304

S. Wolf, S. Richter, J. von Zanthier, F. Schmidt-Kaler, Light of Two Atoms in Free Space: Bunching or Antibunching?, Phys. Rev. Lett. 124, 063603 (2020)

R. Haas, T. Kieck, D. Budker, C. E. Düllmann, K. Groot-Berning, W. Li, D. Renisch, F. Schmidt-Kaler, F. Stopp, A. Viatkina
Development of a recoil ion source providing slow Th ions including 229(m)Th in a broad charge state distribution, Hyperfine interactions 241, 25 (2020),

Filippo Maria Gambetta, Weibin Li, Ferdinand Schmidt-Kaler, Igor Lesanovsky,
Engineering non-binary Rydberg interactions via electron-phonon coupling
Phys. Rev. Lett. 124, 03402 (2020)


J. Vogel, W.Li, A. Mokhberi, I. Lesanowsky, F. Schmidt-Kaler,
Shuttling of Rydberg ions for fast entangling operations, Phys. Rev. Lett. 123, 153603 (2019), PDF

A. Mokhberi, J. Vogel, J. Andrijauskas, J. Walz, F. Schmidt-Kaler,
Determination of quantum defect for the Rydberg P series of Ca II,
arXiv:1902.04391, special issue on Rydberg interactions in J. Phys. B 52, 214001 (2019)

K. Groot-Berning, T. Kornher, G. Jacob, F. Stopp, S. Dawkins, R. Kolesov, J. Wrachtrup, K. Singer, F. Schmidt-Kaler, Deterministic single ion implantation of rare-earth ions for nanometer resolution colour center generation,  Phys. Rev. Lett.123, 106802 (2019). Selected and featured by the editors. See article by Belle Dume in Physics World 19 Sep. 2019.

F. Schmidt-Kaler, and U. G. Poschinger, Chapter on Trapped Ions in Quantum Information, second edition, Whiley (2019), Edr. Leuchs & Bruss.

D. von Lindenfels, O. Gräb, C. T. Schmiegelow, V. Kaushal, J. Schulz, Mark T. Mitchison, John Goold, F. Schmidt-Kaler, and U. G. Poschinger
"A spin heat engine coupled to a harmonic-oscillator flywheel", Phys. Rev. Lett. 123, 080602 (2019).
Selected and featured by the editors.

L. Bouten, G. Vissers, F. Schmidt-Kaler,
Quantum simulating an experiment: Light interference from single ions and their mirror images,Phys. Rev. A 100, 022323 (2019)

Felix Stopp, Karin Groot-Berning, Georg Jacob, Dmitry Budker, Raphael Haas, Dennis Renisch, Jörg Runke, Petra Thörle-Pospiech, Christoph Düllmann, Ferdinand Schmidt-Kaler,
"Catching, trapping and in-situ-identification of thorium ions inside Coulomb crystals of 40Ca+ ions"Hyperfine Interact (2019) 240: 33. (PDF)

Abasalt Bahrami, Matthias Müller, Martin Drechsler, Jannis Joger, Rene Gerritsma, Ferdinand Schmidt-Kaler
"Operation of a Microfabricated Planar Ion-Trap for Studies of a Yb+-Rb Hybrid Quantum System", Physica Status Solidi B: Basic Solid State Physics 1800647 (2019), arXiv:1811.07670

C. Henkel, G. Jacob, F. Stopp, F. Schmidt-Kaler, Mark Keil, Yonathan Japha, Ron Folman, Stern Gerlach splitting for low-energy ion beams, New Journal of Physics 21, 083022 (2019), pdf

Karin Groot-Berning, Felix Stopp, Georg Jacob, Dmitry Budker, Raphael Haas, Dennis Renisch, Jörg Runke, Petra Thörle-Pospiech, Christoph Düllmann, Ferdinand Schmidt-Kaler, "Trapping and sympathetic cooling of single thorium ions for spectroscopy"Phys. Rev. A 99, 023420, arXiv:1807.05975

M. Solyanik-Gorgone, A. Afanasev, C. Carlson, C. T. Schmiegelow, F. Schmidt-Kaler, "Excitation of E1-forbidden Atomic Transitions with Electric, Magnetic or Mixed Multipolarity in Light Fields Carrying Orbital and Spin Angular Momentum" J. Opt. Soc. Am. B 36(3), 565 (2019), pdf, arXiv:1811.05871

J. Welzel, F.Stopp, F. Schmidt-Kaler,
"Spin and motion dynamics with zigzag ion crystals in transverse magnetic field gradients", J. Phys. B: At. Mol. Opt. Phys. 52 025301 (2019), pdf, arxiv:1801.03391


S.Wolf, D. Studer, K.Wendt, F. Schmidt-Kaler,
"Efficient and robust photo-ionization loading of beryllium ions",
Appl. Phys. B 124:30 (2018)arXiv:1711.01060

Andrei Afanasev, Carl E. Carlson, Christian T. Schmiegelow, Jonas Schulz, Ferdinand Schmidt-Kaler,
Maria Solyanik,
"Experimental Verification of Position-Dependent Angular-Momentum Selection Rules for Absorption of Twisted Light by a Bound Electron", New J. Phys. 20 023032 (2018)  arXiv:1709.05571
See also nice highlight article in physics today "Atomic absorption of twisted light - A single trapped ion reveals atoms’ sensitive, position-dependent interaction with light having orbital angular momentum" by Richard J. Fitzgerald


G. F. Quinteiro, F. Schmidt-Kaler, C. T. Schmiegelow,
"Twisted - Light - Ion interaction: The role of longitudinal fields",
Phys. Rev. Lett. 119, 253203 (editors selection)

A. Bermudez, X. Xu, R. Nigmatullin, J. O’Gorman, V. Negnevitsky, P. Schindler, T. Monz, U. G. Poschinger, C. Hempel, J. Home, F. Schmidt-Kaler, M. Biercuk, R. Blatt, S. Benjamin, and M. Müller,
"Assessing the Progress of Trapped-Ion Processors Towards Fault-Tolerant Quantum Computation",
Phys. Rev. X 7, 041061

H. Kaufmann, T. Ruster, C. T. Schmiegelow, M. A. Luda, V. Kaushal, J. Schulz, D. von Lindenfels, F. Schmidt-Kaler, and U. G. Poschinger,
"Scalable Creation of Long-Lived Multipartite Entanglement",
Phys. Rev. Lett. 119, 150503 (editors selection)

T. Ruster, H. Kaufmann, M. A. Luda, V. Kaushal, C. T. Schmiegelow, F. Schmidt-Kaler, and U. G. Poschinger,
"Entanglement-Based dc Magnetometry with Separated Ions",
Phys. Rev. X 7, 031050

Henning Kaufmann, Thomas Ruster, Christian T. Schmiegelow, Marcelo A.Luda, Vidyut Kaushal, Jonas Schulz, David von Lindenfels, Ferdinand Schmidt-Kaler, Ulrich G. Poschinger,
"Fast ion swapping for quantum information processing",
Phys. Rev. A 95, 052319 (2017).

A Mokhberi, R Schmied and S Willitsch
"Optimised surface-electrode ion-trap junctions for experiments with cold molecular ions",
New J. Physics, Vol 19, April 2017

 Nathan Leefer, Kai Krimmel, William Bertsche, Dmitry Budker, Joel Fajans, Ron Folman, Hartmut Häffner, and Ferdinand Schmidt-Kaler
"Investigation of two-frequency Paul traps for antihydrogen production",
Hyperfine Interact (2017) 238: 12. doi:10.1007/s10751-016-1388-0arXiv:1603.09444


Christian T. Schmiegelow, Jonas Schulz, Henning Kaufmann, Thomas Ruster, Ulrich G. Poschinger & Ferdinand Schmidt-Kaler
"Transfer of optical orbital angular momentum to a bound electron"
Nature Communications 7, 12998 (2016)

Thomas Ruster, Christian T. Schmiegelow, Henning Kaufmann, Claudia Warschburger, Ferdinand Schmidt-Kaler, Ulrich G. Poschinger
"A long-lived Zeeman trapped-ion qubit"
Applied Physics B, 122(10), 1-7

T. Secker, R. Gerritsma, A. W. Glaetzle, A. Negretti,
"Controlled long- range interactions between Rydberg atoms and ions",
Phys. Rev. A 94, 013420 (2016)

M.F. Brandl, M.W. van Mourik, L. Postler, A. Nolf, K. Lakhmanskiy, R.R. Paiva, S. Möller, N. Daniilidis, H. Häffner, V. Kaushal, T. Ruster, C. Warschburger, H. Kaufmann, U.G. Poschinger, F. Schmidt-Kaler, P. Schindler, T. Monz, R. Blatt, "Cryogenic setup for trapped ion quantum computing", Rev. Sci. Instrum. 87, 113103 (2016)

Georg Jacob, Karin Groot-Berning, Sebastian Wolf, Stefan Ulm, Luc Couturier, Samuel T. Dawkins, Ulrich G. Poschinger, Ferdinand Schmidt-Kaler, and Kilian Singer,
Transmission Microscopy with Nanometer Resolution Using a Deterministic Single Ion Source, Phys. Rev. Lett. 117, 043001 (2016), featured by APS Physics  and Nature Aug. 2016,
see also nice popular article by Chris Lee in ars technica

J. M. Schurer, R. Gerritsma, P. Schmelcher, A. Negretti"Impact of Many-Body Correlations on the Dynamics of an Ion-Controlled Bosonic Josephson Junction"Phys. Rev. A 93, 063602 (2016)

Georg Jacob, Karin Groot-Berning, Ulrich G. Poschinger, Ferdinand Schmidt-Kaler, Kilian Singer
"Maximizing the information gain of a single ion microscope using bayes experimental design",
SPIE Proceedings 9900, Quantum Optics (2016), article doiarXiv:1605.05071

Sebastian Wolf, Julian Wechs, Joachim von Zanthier, Ferdinand Schmidt-Kaler,"Visibility of Young's interference fringes: Scattered light from small ion crystals", Phys. Rev. Lett. 116, 183002 (2016)arXiv:1511.08697

A. Pfister, M. Salz, M. Hettrich, U. G. Poschinger, F. Schmidt-Kaler,
"A Quantum Repeater Node with Trapped Ions: A Realistic Case Example", Appl. Phys. B 122:89 (2016)arXiv:1507.05207 , (2015)

J. Roßnagel, S. Dawkins, N. Tolazzi, O. Abah, E. Lutz, F. Schmidt-Kaler, K. Singer
"A single-atom heat engine",
Science 352, 325 (2016): AbstractReprintFull Text View article "The power of one atom" in research highlights of Nature Nanotechnology 11, 492 (2016)pdf
The single atom heat engine has been selected as one of the top ten breakthroughs in physics in the year 2016 by IOP Physics World

F. Schmidt-Kaler, E. Lutz
"Carnot im Nanomasstab",
Physik Journal, p. 18, März (2016) (pdf)

P. Bachor, T. Feldker, J. Walz, F. Schmidt-Kaler
"Towards Rydberg quantum logic with trapped ions", J. Phys. B: At. Mol. Opt. Phys. 49 (2016) 154004

C. T. Schmiegelow, H. Kaufmann, T. Ruster, J. Schulz, V. Kaushal, M. Hettrich, F. Schmidt-Kaler, and U. G. Poschinger
"Phase-Stable Free-Space Optical Lattices for Trapped Ions",
Phys. Rev. Lett. 116, 033002 (2016)

I. Talukdar, D. J. Gorman, N. Daniilidis, P. Schindler, S. Ebadi, H. Kaufmann, T. Zhang, H. Haner
"Implications of surface noise for the motional coherence of trapped ions", Phys. Rev. A 93, 043415 (2016)arXiv:1511.04819


 Matthias M. Müller, Ulrich G. Poschinger, Tommaso Calarco, Simone Montangero, and Ferdinand Schmidt-Kaler,
"Phonon-to-spin mapping in a system of a trapped ion via optimal control"
Phys. Rev. A 92, 053423 (2015)

 T. Feldker, P. Bachor, M. Stappel, D. Kolbe, R. Gerritsma, J. Walz, F. Schmidt-Kaler,
"Rydberg excitation of a single trapped ion",
Phys. Rev. Lett. 115, 173001 (2015)
P. Pérez et al.
"The GBAR antimatter gravity experiment",
Hyperfine Interactions, 233-1, 21 (2015)
M. Hettrich, T. Ruster, H. Kaufmann, C. F. Roos, C. T. Schmiegelow, F. Schmidt-Kaler, U. G. Poschinger,
"Measurement of Dipole Matrix Elements with a Single Trapped Ion",
Phys. Rev. Lett. 115, 143003 (2015)

M. Palmero, S. Martínez-Garaot, U. G. Poschinger, A. Ruschhaupt, J. G. Muga,
"Fast separation of two trapped ions",
New J. Phys. 17, 093031 (2015)

Rejish Nath, Marcello Dalmonte, Alexander W Glaetzle, Peter Zoller, Ferdinand Schmidt-Kaler, Rene Gerritsma,
"Hexagonal Plaquette Spin-spin Interactions and Quantum Magnetism in a Two-dimensional Ion Crystal",
New J. Phys. 17, 065018 (2015)

J. Roßnagel, K. N. Tolazzi, F. Schmidt-Kaler, K. Singer,
"Fast thermometry for trapped ions using dark resonances",
New J. Phys. 17, 045004 (2015)

A. Lemmer, C. Cormick, C. T. Schmiegelow, F. Schmidt-Kaler, M. B. Plenio,
"Two-Dimensional Spectroscopy for the Study of Ion Coulomb Crystals",
Phys. Rev. Lett. 114, 073001 (2015)


K. Groot-Berning, N. Raatz, I. Dobrinets, M. Lesik, P. Spinicelli, A. Tallaire, J. Achard, V. Jacques, J.F. Roch, A.M. Zaitsev, J. Meijer, S. Pezzagna,
"Passive charge state control of nitrogen-vacancy centres in diamond using phosphorous and boron doping",
Physica Status Solidi a - Applications and Materials Science 210, 2268 (2014)

T. Ruster, C. Warschburger, H. Kaufmann, C. T. Schmiegelow, A. Walther, M. Hettrich, A. Pfister, V. Kaushal, F. Schmidt-Kaler, U. G. Poschinger,
"Experimental realization of fast ion separation in segmented Paul traps",
Phys. Rev. A 90, 033410 (2014)

A. Negretti, R. Gerritsma, Z. Idziaszek, F. Schmidt-Kaler, T. Calarco,,
"Generalised Kronig-Penney model for ultracold atomic quantum systems",
Phys. Rev. B 90, 155426 (2014)

H. Kaufmann, T. Ruster, C. T. Schmiegelow, F. Schmidt-Kaler, U. G. Poschinger,
"Dynamics and control of fast ion crystal splitting in segmented Paul traps",
New Journal of Physics 16, 073012 (2014)

H. A. Fürst, M. H. Goerz, U. G. Poschinger, M. Murphy, S. Montangero, T. Calarco, F. Schmidt-Kaler, K. Singer, C. P. Koch,
"Controlling the transport of an ion: Classical and quantum mechanical solutions",
New Journal of Physics 16, 075007 (2014)

F. Schmidt-Kaler,
"Quantum physics: Feel the force",
Nature 510, 349 (2014). pdf. bib
Nature news and views of: S. Kotler, et al. Measurement of the magnetic interaction between two bound electrons of two separate ions

G. Jacob, K. Groot-Berning, S. Wolf, S. Ulm, L. Couturier, U. G. Poschinger, F. Schmidt-Kaler, K. Singer,
"Single particle microscopy with nanometer resolution", , (2014)

J. Goold, U. G. Poschinger, K. Modi,
"Measuring the heat exchange of a quantum process",
Phys. Rev. E 90, 020101(R) (2014)

Lu, Xiao-Jing, Muga, J. G., Chen, Xi, Poschinger, U. G., Schmidt-Kaler, F., Ruschhaupt, A.,
"Fast shuttling of a trapped ion in the presence of noise",
Phys. Rev. A 89, 063414 (2014)

J. Joger, A. Negretti, R. Gerritsma,
"Quantum dynamics of an atomic double-well system interacting with a trapped ion",
Phys. Rev. A 89, 063621 (2014)

P. Indelicato, G. Chardin, P. Grandemange, D. Lunney, V. Manea, A. Badertscher, P. Crivelli, A. Curioni, A. Marchionni, B. Rossi, A. Rubbia, V. Nesvizhevsky, D. Brook-Roberge, P. Comini, P. Debu, P. Dupré, L. Liszkay, B. Mansoulié, P. Pérez, J. -M. Rey, B. Reymond, N. Ruiz, Y. Sacquin, B. Vallage, F. Biraben, P. Cladé, A. Douillet, G. Dufour, S. Guellati, L. Hilico, A. Lambrecht, R. Guérout, J. -P. Karr, F. Nez, S. Reynaud, C. I. Szabo, V. -Q. Tran, J. Trapateau andA. Mohri, Y. Yamazaki, M. Charlton, S. Eriksson, N. Madsen, D. P. vanderWerf, N. Kuroda, H. Torii, Y. Nagashima, F. Schmidt-Kaler, J. Walz, S. Wolf, P. -A. Hervieux, G. Manfredi, A. Voronin, P. Froelich, S. Wronka, M. Staszczakhide
"The Gbar project, or how does antimatter fall?"
Hyperfine Interactions , (2014)
Special Issue in International Journal of Modern Physics: Conference Series

G. Werth, F. Schmidt-Kaler, R. Blatt,
"Topical issue Frontiers of ion trap and atomic physics: Wolfgang Paul 100 - Editorial",
Applied Physics B 114, 1 (2014)
Part of Applied Physics B Topical Issue

T. Feldker, L. Pelzer, M. Stappel, P. Bachor, D. Kolbe, J. Walz, F. Schmidt-Kaler,
"Mode shaping in mixed ion crystals of 40Ca2+ and 40Ca+",
Applied Physics B 114, 11 (2014)
Part of Applied Physics B Topical Issue

L. Hilico, J.-P. Karr, A. Doulliet, P. Indelicato, S. Wolf, F. Schmidt-Kaler,
"Preparing single ultra-cold antihydrogen atoms for free-fall in GBAR",
International Journal of Modern Physics: Conference Series 30, 1460269 (2014)
Special Issue in International Journal of Modern Physics: Conference Series

J. Roßnagel, O. Abah, F. Schmidt-Kaler, K. Singer, E. Lutz,
"Nanoscale Heat Engine Beyond the Carnot Limit",
Physical Review Letters 112, 030602 (2014)
spotlight article on


M. A. Luda, M. A. Larotonda, J. P. Paz, C. T. Schmiegelow,
"Manipulating Transverse Modes of Photons for Quantum Cryptography",
arxiv:1312.4365 , (2013)

U. Bissbort, D. Cocks, A. Negretti, Z. Idziaszek, T. Calarco, F. Schmidt-Kaler, W. Hofstetter, R. Gerritsma,
"Emulating solid-state physics with a hybrid system of ultracold ions and atoms",
Physical Review Letters 111, 080501 (2013)
chosen for spotlight article on

S. Ulm, J. Roßnagel, G. Jacob, C. Degünther, S. T. Dawkins, U. G. Poschinger, R. Nigmatullin, A. Retzker, M. B. Plenio, F. Schmidt-Kaler, K. Singer,
"Observation of the Kibble-Zurek scaling law for defect formation in ion crystals",
Nature Communications 4, 2290 (2013)

F. Ziesel, T. Ruster, A. Walther, H. Kaufmann, K. Singer, F. Schmidt-Kaler, U. G. Poschinger,
"Experimental creation and analysis of displaced number states",
Journal of Physics B 46, 104008 (2013)

appearing in special issue "The 20th anniversary of quantum state engineering"

P. A. Ivanov, D. Porras, S. S. Ivanov, F. Schmidt-Kaler,
"Simulation of the Jahn–Teller–Dicke magnetic structural phase transition with trapped ions",
Journal of Physics B 46, 104003 (2013)

appearing in special issue "The 20th anniversary of quantum state engineering"

P. Bushev, G. Hétet, L. Slodicka, D. Rotter, M. A. Wilson, F. Schmidt-Kaler, J. Eschner, R. Blatt,
"Shot-Noise-Limitet Monitoring and Phase Locking of the Motion of a Single Trapped Ion",
Physical Review Letters 110, 133602 (2013)


F. Schmidt-Kaler, D. Leibfried,
"Zauberer im Quantenreich",
Physik Journal , (2012)

H. Kaufmann, S. Ulm, G. Jacob, U. G. Poschinger, H. Landa, A. Retzker, M.B. Plenio, F. Schmidt-Kaler,
"Precise experimental investigation of eigenmodes in a planar ion crystal",
Physical Review Letters 109, 263003 (2012)

O. Abah, J. Roßnagel, G. Jacob, S. Deffner, F. Schmidt-Kaler, K. Singer, E. Lutz,
"Single-Ion Heat Engine at Maximum Power",
Physical Review Letters 109, 203006 (2012)
news article on

R. Ferrer, V. T. Sonnenschein, B. Bastin, S. Franchoo, M. Huyse, Yu. Kudryavtsev, T. Kron, N. Lecesne, I. D. Moore, B. Osmond, D. Pauwels
and D. Radulow, S. Raeder, L. Rens, M. Reponen, J. Roßnagel, H. Savajols, T. Sonoda, J. C. Thomas, P. Van den Bergh, P. Van Duppen and
K. Wendt, S. Zemlyanoy
"Performance of a high repetition pulse rate laser system for in-gas-jet laser ionization studies with the Leuven laser ion source @ LISOL",
Nuclear Instruments and Methods in Physics Research B 291, 29-37 (2012)

A. Bermudez, J. Almeida, K. Ott, H. Kaufmann, S. Ulm, U. G. Poschinger, F. Schmidt-Kaler, A. Retzker, M. B. Plenio,
"Quantum Magnetism of Spin-Ladder Compounds with Trapped-Ion Crystals",
New Journal of Physics 14, 093042 (2012)
chosen for the NJP Highlights 2012

F. Schmidt-Kaler, R. Gerritsma,
"Entangled states of trapped ions allow measuring the magnetic field gradient of a single atomic spin",
Europhysics Letters 99, 53001 (2012)

R. Gerritsma, A. Negretti, H. Deork, Z. Idziaszek, T. Calarco, F. Schmidt-Kaler,
"Bosonic Josephson Junction Controlled by a Single Trapped Ion",
Physical Review Letters 109, 080402 (2012)

J. Schütz, T. Feldker, H. John, G. Birkl,
"Heteronuclear collisions between laser-cooled metastable neon atoms",
Physical Review A 86, 022713 (2012)

A. Walther, F. Ziesel, T. Ruster, S. T. Dawkins, K. Ott, M. Hettrich, K. Singer, F. Schmidt-Kaler, U. G. Poschinger,
"Controlling fast transport of cold trapped ions",
Physical Review Letters 109, 080501 (2012)
APS viewpoint article

D. Porras, P. A. Ivanov, F. Schmidt-Kaler,
"Quantum Simulation of the Cooperative Jahn-Teller Transition in 1D Ion Crystals",
Physical Review Letters 108, 235701 (2012)

C. T. Schmiegelow, F. Schmidt-Kaler,
"Light with orbital angular momentum interacting with trapped ions",
European Journal of Physics D 66, 157 (2012)

J. Roßnagel, S. Raeder, A. Hakimi, R. Ferrer, N. Trautmann, K. Wendt,
"Determination of the first ionization potential of actinium",
Physical Review A 85, 012525 (2012)
U. G. Poschinger, A. Walther, M. Hettrich, F. Ziesel, F. Schmidt-Kaler,
"Interaction of a laser with a qubit in thermal motion and its application to robust and efficient readout",
Applied Physics B: Lasers and Optics 107, 1159 (2012)

A. Walther, U. G. Poschinger, K. Singer, F. Schmidt-Kaler ,
"Precision measurements in ion traps using slowly moving standing waves", arxiv
Applied Physics B: Lasers and Optics 107, 1061 (2012)


J. Casanova, L. Lamata, I. L. Egusquinza, R. Gerritsma, C. F. Roos J. J. García-Ripoll, E. Solano,
"Quantum simulation of quantum field theories in trapped ions",
Physical Review Letters 107, 260501 (2011)

J. Casanova, C. Sabín, J. León, I. L. Egusquiza, R. Gerritsma, C. F. Roos, J. J. García-Ripoll, E. Solano,
"Quantum simulation of the Majorana equation and unphysical operations",
Physical Review X 1, 021018 (2011)

S. T. Dawkins, R. Ritsch, D. Reitz, E. Vetsch, A. Rauschenbeutel,
"Dispersive Optical Interface Based on Nanofiber-Trapped Atoms",
Physical Review Letters 107, 243601 (2011)

P. A. Ivanov, F. Schmidt-Kaler,
"Simulation of Quantum Magnetism in Mixed Spin Systems with Impurity Doped Ion Crystal",
New Journal of Physics 13, 125008 (2011)

S. Narayanan, N. Daniilidis, S. Möller, R. Clark, F. Ziesel, K. Singer, F. Schmidt-Kaler, H. Häffner,
"Electric field compensation and sensing with a single ion in a planar trap",
Journal of Applied Physics 110, 114909 (2011)

A. Bermudez, J. Almeida, F. Schmidt-Kaler, A. Retzker, M. B. Plenio,
"Frustrated Quantum Spin Models with Cold Coulomb Crystals",
Physical Review Letters 107, 207209 (2011)

T. Feldker, J. Schütz, H. John, and G. Birkl,
"Magneto-optical trapping of bosonic and fermionic neon isotopes
and their mixtures: isotope shift of the 3P2 - 3D3 transition
and hyperfine constants of the 3D3 state of 21Ne"
European Physics Journal D 65, 257 (2011)

J. Welzel, A. Bautista-Salvador, C. Abarbanel, V. Wineman-Fisher, C. Wunderlich, R. Folman, F. Schmidt-Kaler,
"Designing spin-spin interactions with one and two dimensional ion crystals in planar micro traps",
The European Physical Journal D 65, 285 (2011)

P. Bushev, D. Bothner, J. Nagel, M. Kemmler, K. B. Konovalenko, A. Loerincz, K. Ilin, M. Siegel, D. Koelle, R. Kleiner, F. Schmidt-Kaler,
"Trapped electron coupled to superconducting devices",
The European Physical Journal D 63, 9 (2011)

F. Schmidt-Kaler, T. Feldker, D. Kolbe, J. Walz, M. Müller, P. Zoller, W. Li, I. Lesanovsky,
"Rydberg excitation of trapped cold ions: a detailed case study",
New Journal of Physics 13, 075014 (2011)

A. Walther, U. G. Poschinger, F. Ziesel, M. Hettrich, A. Wiens, J. Welzel, F. Schmidt-Kaler ,
"Single ion as a shot-noise-limited magnetic-field-gradient probe",
Physical Review A 83, 062329 (2011)

N. Daniilidis, S. Narayanan, S. A. Möller, R. Clark, T. E. Lee, P. J. Leek, A. Wallraff, St. Schulz, F. Schmidt-Kaler, H. Häffner,
"Fabrication and heating rate study of microscopic surface electrode ion traps",
New Journal of Physics 13, 013032 (2011)

T. Karin, I. Le Bras, A. Kehlberger, K. Singer, N. Daniilidis, H. Häffner,
"Transport of charged particles by adjusting rf voltage amplitudes",
Applied Physics B: Lasers and Optics 106, 117 (2011)


U. G. Poschinger, A. Walther, K. Singer, F. Schmidt-Kaler,
"Observing the Phase Space Trajectory of an Entangled Matter Wave Packet",
Physical Review Letters 105, 263602 (2010)

P. A. Ivanov, U. G. Poschinger, K. Singer, F. Schmidt-Kaler,
"Quantum gate in the decoherence-free subspace of trapped-ion qubits",
Europhysics Letters 92, 30006 (2010)

K. Singer, U. G. Poschinger, M. Murphy, P. A. Ivanov, F. Ziesel, T. Calarco, F. Schmidt-Kaler,
"Colloquium: Trapped ions as quantum bits: Essential numerical tools",
Review of Modern Physics 82, 2609 (2010)

G. Huber, F. Ziesel, U. G. Poschinger, K. Singer, F. Schmidt-Kaler,
"A trapped-ion local field probe",
Applied Physics B: Lasers and Optics 100, 725 (2010)

F. Schmidt-Kaler, T. Pfau, P. Schmelcher, W. Schleich,
"Focus on atom optics and its applications",
New Journal of Physics 12, 0650014 (2010)

W. Schnitzler, G. Jacob, R. Fickler, F. Schmidt-Kaler, K. Singer,
"Focusing a deterministic single-ion beam",
New Journal of Physics 12, 065023 (2010)

M. Hellwig, A. Bautista-Salvador, K. Singer, G. Werth, F. Schmidt-Kaler,
"Fabrication of a segmented micro Penning trap and numerical investigations of versatile ion positioning protocols",
New Journal of Physics 12, 065019 (2010)

F. Schmidt-Kaler,
"Jonglieren mit Atomen",
Physik Journal 9, 20 (2010)
discussed work: Photon-by-photon feedback control of a single-atom trajectory von A. Kubanek et al., Nature 462, 898-901 (2009)

J. Eble, S. Ulm, P. Zahariev, F. Schmidt-Kaler, K. Singer,
"Feedback-optimized operations with linear ion crystals",
Journal of the Optical Society of America B 27, A99 (2010)
selected for publication in the July 2010 issue of Virtual Journal of Quantum Information

P. A. Ivanov, N. Vitanov, K. Singer, F. Schmidt-Kaler,
"Dynamical control and novel quantum phases in impurity doped linear ion crystals",
arXiv:1002.3033 , (2010)


A. Mering, M. Fleischhauer, P. A. Ivanov, K. Singer,
"Analytic approximations to the phase diagram of the Jaynes-Cummings-Hubbard model",
Physical Review A 80, 053821 (2009)

H. Wunderlich, C. Wunderlich, K. Singer, F. Schmidt-Kaler,
"Two-dimensional cluster-state preparation with linear ion traps",
Physical Review A 79, 052324 (2009)

P. A. Ivanov, S. S. Ivanov, N. V. Vitanov, A. Mering, M. Fleischhauer, K. Singer,
"Simulation of a quantum phase transition of polaritons with trapped ions",
Physical Review A 80, 060301R (2009)

R. Otto, P. Hlavenka, S. Trippel, J. Mikosch, K. Singer, M. Weidemüller, R. Wester,
"How can a 22-pole ion trap exhibit 10 local minima in the effective potential?",
Journal of Physics B 42, 154007 (2009)

S. A. Schulz, R. Wöstenfeld, R. Kastl, F. Schmidt-Kaler, V. Nordmeier,
"Demonstrationsexperimente mit linearen Paulfallen",
Phydid 8, 15 (2009)

R. Fickler, W. Schnitzler, Norbert M. Linke, F. Schmidt-Kaler, K. Singer,
"Optimised focusing ion optics for an ultracold deterministic single ion source targeting nm resolution",
Journal of Modern Optics 56, 2061 (2009)

W. Schnitzler, N. M. Linke, R. Fickler, J. Meijer, F. Schmidt-Kaler, K. Singer,
"Deterministic Ultracold Ion Source Targeting the Heisenberg Limit",
Physical Review Letters 102, 070501 (2009)
selected for the virtual magazines Virt. J. Nan. Sci. & Tech. 19, 9 (2009), and Virtual Journal for Quantum Information; see also a press release (for non-physicists) in german Pressemitteilung in<br />

U. G. Poschinger, G. Huber, F. Ziesel, M. Deiss, M. Hettrich, S. A. Schulz, G. Poulsen, M. Drewsen, R. J. Hendricks, K. Singer, F. Schmidt-Kaler,
"Coherent Manipulation of a 40Ca+ Spin Qubit in a Micro Ion Trap",
Journal of Physics B 42, 154013 (2009)

W. Nörtershäuser, D. Tiedemann, M. Zakova, Z. Andjelkovic, K. Blaum, M. L. Bissell, R. Cazan, G.W.F. Drake, Ch. Geppert, M. Kowalska, J. Krämer, A. Krieger, R. Neugart, R. Sanchez, F. Schmidt-Kaler, Z.-C. Yan, D. T. Yordanov, C. Zimmermann,
"Nuclear Charge Radii of 7,9,10Be and the one-neutron halo nucleus 11Be",
Physical Review Letters 102, 062503 (2009)

I. Marzoli, P. Tombesi, G. Ciaramicoli, G. Werth, P. Bushev, S. Stahl, F. Schmidt-Kaler, M. Hellwig, C. Henkel, G. Marx, I. Jex, E. Stachowska, G. Szawiola, A. Walaszyk,
"Experimental and theoretical challenges for the trapped electron quantum computer",
Journal of Physics B 42, 154010 (2009)

P. Wolf, Ch. J. Bordé, A. Clairon, L. Duchayne, A. Landragin,
P. Lemonde, G. Santarelli, W. Ertmer, E. Rasel, F. S. Cataliotti,
M. Inguscio, G. M. Tino, P. Gill, H. Klein, S. Reynaud, C. Salomon
E. Peik, O. Bertolami, P. Gil, J. Páramos, C. Jentsch, U. Johann and
A. Rathke, P. Bouyer, L. Cacciapuoti, D. Izzo, P. De Natale and
B. Christophe, P. Touboul, S. G. Turyshev, J. Anderson, M. E. Tobar and
F. Schmidt-Kaler, J. Vigué, A. A. Madej, L. Marmet, M.-C. Angonin and
P. Delva, P. Tourrenc, G. Metris, H. Müller, R. Walsworth, Z. H. Lu and
L. J. Wang, K. Bongs, A. Toncelli, M. Tonelli, H. Dittus, C. Lämmerzahl and
G. Galzerano, P. Laporta, J. Laskar, A. Fienga, F. Roques, K. Sengstock
"Quantum physics exploring gravity in the outer solar system: the SAGAS project",
Experimental Astronomy 23, 651 (2009)


P. Bushev, S. Stahl, R. Natali, G. Marx, E. Stachowska, G. Werth, M. Hellwig, F. Schmidt-Kaler,
"Electrons in a cryogenic planar Penning trap and experimental challenges for quantum processing",
The European Physics Journal D 50, 97 (2008)

G. Huber, F. Schmidt-Kaler, S. Deffner, E. Lutz,
"Employing Trapped Cold Ions to Verify the Quantum Jarzynski Equality",
Physical Review Letters 101, 070403 (2008)

B. S. Zhao, S. A. Schulz, S. A. Meek, G. Meijer, W. Schöllkopf,
"Quantum reflection of helium atom beams from a microstructured grating",
Physical Review A 78, 010902 (2008)

J. Meijer, S. Pezzagna, T. Vogel, B. Burchard, H.H. Bukow, I. W. Rangelow, Y. Sarov,
H. Wiggers, I. Plümel, F. Jelezko, J. Wrachtrup, F. Schmidt-Kaler, W. Schnitzler, K. Singer
"Towards the implanting of ions and positioning of nanoparticles with nm spatial resolution",
Applied Physics A: Materials Science and Processing 91, 567 (2008)

S. A. Schulz, U. G. Poschinger, F. Ziesel, F. Schmidt-Kaler,
"Sideband cooling and coherent dynamics in a microchip multi-segmented ion trap",
New Journal of Physics 10, 045007 (2008)

G. Huber, T. Deuschle, W. Schnitzler, R. Reichle, K. Singer, F. Schmidt-Kaler,
"Transport of ions in a segmented linear Paul trap in printed-circuit-board technology",
New Journal of Physics 10, 013004 (2008)


F. Schmidt-Kaler, P. Grangier,
"Les constructeurs de qubits",
Les Dossiers de la Recherche 29, (2007)

F. Schmidt-Kaler, P. Wolf, P. Gill,
"Cold Ions in Space",
"Enrico Fermi" Summer School, (Varena, Italy), Course CLXVIII - "Atom Optics and Space Physics" , (2007)

J.F. Eble, F. Schmidt-Kaler,
"Optimization of frequency modulation transfer spectroscopy on the calcium 4-1S0 to 4-1P1 transition",
Applied Physics B: Lasers and Optics 88, 563 (2007)

M. Schulz, H. Crepaz, F. Schmidt-Kaler, J. Eschner, R. Blatt,
"Transfer of trapped atoms between two optical tweezer potentials",
Journal of Modern Optics 54, 1619 (2007)

F. Schmidt-Kaler,
"Total surveillance",
Nature 446, 275 (2007)

Chr. Wunderlich, Th. Hannemann, T.K. Körber, H. Häffner, Ch. Roos, W. Hänsel, R. Blatt, F.
"Robust state preparation of a single trapped ion by adiabatic
J. Mod. Opt. 54, 1541 (2007)


F. Schmidt-Kaler,
"Quantum Computing with Cold Ions and Atoms: Experiments with Ion Traps",
Lectures on Quantum Information, Wiley-VCH, Berlin , (2006)

M. Žáková, Ch. Geppert, A. Herlert, H.-J. Kluge and
R. Sánchez, F. Schmidt-Kaler, D. Tiedemann and
C. Zimmermann, W. Nórtersháuser
"Towards a nuclear charge radius determination for beryllium isotopes",
Hyperfine Interactions 171, 189 (2006)

S. A. Schulz, U. G. Poschinger, K. Singer, F. Schmidt-Kaler,
"Optimization of segmented linear Paul traps and transport of stored particles",
Progress of Physics 54, 648 (2006)

R. Reichle, D. Leibfried, R. B. Blakestad, J. Britton J. D. Jost, E. Knill, C. Langer, R. Ozeri, S. Seidelin, D. J. Wineland,
"Transport dynamics of single ions in segmented microstructured Paul trap arrays",
Progress of Physics 54, 666 (2006)

J. Meijer, T. Vogel, B. Burchard, I. Rangelow, L. Bischoff, J. Wrachtrup, M. Domhan, F. Jelezko, W. Schnitzler, S. A. Schulz, K. Singer, F. Schmidt-Kaler,
"Concept of deterministic single ion doping with sub-nm spatial resolution",
Applied Physics A: Materials Science and Processing 83, 321 (2006)

H. Häffner, M. Riebe, F. Schmidt-Kaler, W. Hänsel, C. F. Roos, M. Chwalla, J. Benhelm, T. W. Körber, G. P. T. Lancaster, C. Becher, D.F.V. James, R. Blatt, eds. M. Nakahara, S. Kanemitsu, M.M. Salomaa, S Takagi,
"Controlling three atomic qubits", in Physical Realizations of Quantum Computing,
World Scientific, Singapore, 2006.

Earlier work