Institutstreff 2022- Programm WA Quantum

AG Schmidt-Kaler - Quantenbit

Posters and Lab tour: „Scalable Quantum Computer with Ions”

We discuss the basics of quantum computing, but also trap fabrication, operation of segmented traps for qubit register reconfiguration, the full electronic and optical control architecture, quantum compilation of algorithms, and show the fault tolerant plaquette readout in view of quantum error correction.

Offered at 10.00 and 11.00, max 12 persons each session, booking meet in front of elevator 2nd floor. Contact for registration: stuckker@uni-mainz.de

 

Posters and Lab tour: “Vortex Modes and Light Scattering and TACTICA”

We show experiments on the interaction of vortex-formed light fields with a single ion, such that the external angular momentum of light is transferred to the spin of the electron or the motion of the ion. Also, we show the observation of g2 photon correlations in the scattered light of ion crystals, which tell about the projectively produced Dicke states. And we show the sympathetic cooling of Th+ ions with the aim of quantum logic spectroscopy.

Offered at 10.00 and 11.00, max 12 persons each session, booking meet in front of elevator 2nd floor. Contact for registration: stuckker@uni-mainz.de

 

Lab visit & exhibition: "Trapped Ion Quantum Computer"

We give an overview on the group's activities on setting up a quantum information processing platform based on trapped atomic ions, targeting meaningful scientific and commercial applications. This requires strong interdisciplinary efforts on microfabrication, optical engineering, software development and vacuum technology. We show how these technological components are developed and intergrated to a mature quantum computer platform.

Offered at 10.00, max 12 persons each session, booking: https://doodle.com/meeting/participate/id/eVmNMj5d meet in front of  Elevators / 2nd floor / Staudingerweg 7

Offered at 11.00, max 12 persons each session, booking: https://doodle.com/meeting/participate/id/dGZ9qJrb meet in front of Elevators / 2nd floor / Staudingerweg 7

 

AG Windpassinger – Experimental Quantum Optics and Quantum Information

Lab visit: "Ultracold Dysprosium"

In this project, we intend to investigate the impact of strong magnetic correlations in a dense cold gas of dipolar dysprosium atoms onto the propagation of light as well as signatures of cooperative effects, like sub- or superradiance, are investigated in an experiment-theory collaboration. We plan to map the magnetic dipole-dipole interaction onto light and the control over the cold atom samples should allows us to actively shape the outgoing light state.

Offered at 10.00 and 11.00, max 12 persons each session, booking: https://doodle.com/meeting/participate/id/dRgPoERe meet in front of 02-127

 

Poster discussion and exposition: "Quantum measurements in space"

Our group develops laser system technology, like optical benches, for the application in matter wave interferometry experiments on sounding rockets or the international space station. On the posters, we discuss the science missions and experimental approaches, and in parallel display some of the optical systems we have realized.

Offered at 10.30 and 11.30, max 12 persons each session, booking: https://doodle.com/meeting/participate/id/b8qM6m5d meet in front of 02-127

 

AG van Loock – Optical Quantum Information Theory

Poster discussion: "How to correct errors in quantum technology: quantum communication"

One of the most important elements in the field of quantum information is the concept of quantum error correction. Before its invention in 1995, it appeared ill-defined, since the classical approach of creating redundancy for a robust encoding of information cannot be directly applied due to the quantum mechanical no-cloning theorem. The solution of 1995 was to make use of the notion of entanglement. Here we discuss the most recent development of quantum error correction codes for protecting quantum states of light against loss and noise in a quantum communication channel which could ultimately lead to applications such as a quantum internet. In particular, the quantized oscillator states of light modes can be directly employed for encoding and, in principle, there is no need to rely on complicated entangled states with many physical qubits (for an example of a "quantum company" following this "continuous-variable" photonics approach, see https://www.xanadu.ai/).

Offered at 10.00 and 11.00, meet in front of 05-530

 

Poster discussion: "How to correct errors in quantum technology: quantum computation"

One of the most important elements in the field of quantum information is the concept of quantum error correction . Before its invention in 1995, it appeared ill-defined, since the classical approach of creating redundancy for a robust encoding of information cannot be directly applied due to the quantum mechanical no-cloning theorem. The solution of 1995 was to make use of the notion of entanglement. Since entanglement is so fundamental and since it may serve as a universal resource in quantum computation, recent approaches to fault-tolerant quantum computing aim to combine the quantum computational and quantum error correction features of entangled states. Here we discuss such schemes for photonic quantum computers based on entangled states of many optical qubits (for an example of a "quantum company" following this "discrete-variable" photonics approach, see https://psiquantum.com/).

Offered at 10.30 and 11.30, meet in front of 05-530

 

AG Pohl – Laser Spectroscopy of Exotic Atoms

Lab tour 1: “Lithium Spectroscopy and Magneto-Optical Traps”

In our lab we are building a 2D and a 3D magneto-optical trap for lithium-6.

Offered at 10.00, 10.30, 11.00 and 11.30; max 10 persons each session
Meeting point: First Kreuzbau, Staudingerweg 7, 2nd floor in front of the elevators.
Contact for registration: marcel.willig@uni-mainz.de

We would prefer a registration, but, depending on the group size, you might also be able to join by just coming to the meeting point on time.

 

Lab tour 2: “Progress on Hydrogen/Tritium Spectroscopy”

We are currently preparing for the first 1S-2S measurement on a cryogenic hydrogen beam.

Key parts are the completed laser system (including a new frequency comb), the atomic hydrogen source, cryogenic nozzle and velocity filtering apparatus, as well as hydrogen beam detection and a micro-channel plate detector for detection of the emitted Lyman-α photons.

Offered at 10.00, 10.30, 11.00 and 11.30; max 10 persons each session
Meeting point: First Kreuzbau, Staudingerweg 7, basement in front of the elevators.
Contact for registration:
meheppen@uni-mainz.de

We would prefer a registration, but, depending on the group size, you might also be able to join by just coming to the meeting point on time.

 

AG Budker - Atomic tests of fundamental symmetries

Lab tour: „Diamond based Quantum sensing”

We discuss the basics of quantum sensing, mechanisms of the Nitrogen-Vacancy center in diamond that can be utilised for that including advantages and how to implement microwave based and microwave free with and without bias magnetic field measurement modalities with it.

Offered at 10.00 and 10.20, max 12 persons each session, meet in the HIM foyer in front of
lab 00-177.
Contact for registration: momar@uni-mainz.de

 

Lab tour: "Searching for dark matter with NMR spectroscopy"

After a short discussion of what we do and do not know about dark matter, we will focus on a hypothetical explanation: axion-like particles. We search for these particles using techniques from the field of nuclear magnetic resonance (NMR) spectroscopy. One of our NMR spectrometers will be demonstrated.

Offered at 10.00, 10.30, 11.00 and 11.30, max 12 persons each session, meet in the HIM foyer

Contact for registration: hbekker@uni-mainz.de

 

AG Wendt - LARISSA

Lab tour: „Laser Spectroscopy on Exotic Isotopes - Challenging Atomic and Isotope Physics"

 

We focus on laser-based ionization and spectroscopy of exotic elements to investigate their complex atomic and nuclear structures. As a reaction on the incident at Chernobyl reactor, the core of the lab - RISIKO mass separator - was build and is still in use to study the ultra-trace quantities of radionuclides, rare-earth elements for different applications, e.g. nuclear medicine or neutrino-mass determination, and heavy actinides towards research on super heavy elements.

Offered at 10.00 and 11.00, no limited access, meet in the basement in front of the elevators

 

AG Fertl

Lab visit: “Towards intense cold atomic hydrogen beam sources”
In this project, the AG Fertl and AG Böser investigate efficient production and cooling mechanisms for high-flux atomic hydrogen beams as a starting point for a future electon neutrino mass measurement based on trapped ultracold atomic tritium.
The energy of the tritium decay electrons shall be reconstructed using cycotron rediation emission spectroscopy.
Offered at 10.00 and 11.00, max 6 persons each session, booking: https://doodle.com/meeting/participate/id/b6607K7b  meet in front of 05-528
Poster discussion and exposition: “Fundamental particle physics with simple quantum systems”
Our group investigates properties of fundamental particles like neutrinos, muons and neutrons with highest precision.
On the posters we discuss our scientific goals, the technologies we use and the latest results obtained within our international collaborations.Offered at 10:30 and 11:30, max 10 persons each session, booking: https://doodle.com/meeting/participate/id/avgj7xgb meet in front of 02-627

 

AG Marino – Non-Equilibrium Universality in Quantum Matter (‘NEUQUAM’)

Talk and Poster discussion:       “Synthetic’ correlated emission: dynamical control, metrology and
criticality in open many body spin system”

Abstract: Controlling the spread of correlations in quantum many-body systems is a key challenge at the heart of quantum science and technology. Correlations are usually destroyed by dissipation arising from coupling between a system and its environment. Here, we show that dissipation can instead be used to engineer a wide variety of spatio-temporal correlation profiles in an easily tunable manner. We describe how dissipation with any translationally-invariant spatial profile can be realized in cold atoms trapped in an optical cavity. A uniform external field and the choice of spatial profile can be used to design when and how dissipation creates or destroys correlations. We demonstrate this control by preferentially generating entanglement at a desired wavevector. We thus establish non-local dissipation as a new route towards engineering the far-from-equilibrium dynamics of quantum information, with potential applications in quantum metrology, state preparation, and transport. Finally we discuss how correlated emission can be utilized to change the universality class of open quantum spin systems at criticality, hinting at extensions of ordinary statistical mechanics to the non-equilibrium realm.

Offered at 10.00 and 11.00, meet at QUANTUM Seminar room 02-427