QuCoLiMa Talks – 03.05.2021 – 15:00 Mikhail Lukin – 16:00 Arthur Widera

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Unfortunately, the public livestream was cancelled. Only pre-registered participants can join the talks! A recording will be made available afterwards.

03.05.2021 – 15:00 & 16:00 (each 30 minutes)

QuCoLiMa-Featured Talks within the SPICE workshop
Dissipative Phases of Entangled Quantum Matter

Exploring new scientific frontiers with programmable atom arrays

15:00 – 15:30 Mikhail Lukin from Harvard University

We will discuss the recent advances involving programmable, coherent manipulation of quantum many-body systems using atom arrays excited into Rydberg states. Specifically, we will describe our recent technical upgrades that now allow the control over 200 atoms in two-dimensional arrays. Recent results involving the realization of exotic phases of matter, study of quantum phase transitions and exploration of their non-equilibrium dynamics will be presented. In particular, we will report on realization and probing of quantum spin liquid states – the exotic states of matter have thus far evaded direct experimental detection. Finally, realization and testing of quantum optimization algorithms using such systems will be discussed.

Nonequilibrium dynamics of quantum gases in time-dependent disorder

16:00-16:30 Artur Widera from TU Kaiserslautern

Ultracold gases have proven powerful model systems to study quantum dynamics in various scenarios. In particular, the ability to tune atomic interactions and to interface these systems with time-dependent potentials opens the door to probe fascinating nonequilibrium dynamics experimentally.
Here, I will discuss our experiments investigating an ultracold Fermi gas along the BEC-BCS crossover in time-dependent disorder.
First, we study the response of a molecular Bose-Einstein condensate when quenched into and out of a disordered optical potential. We unravel the in-situ density and the global phase response and find markedly different time scales. Tracing the quantum relaxation following a quench out of a disordered system, we find that the quantum phase needs a surprisingly long time to relax, pointing at possibly long-lived phase excitations.
Second, we investigate the dissipative dynamics of an interacting gas in disorder with tunable correlation time, where we probe the emerging excitations and dynamics. Comparing the dynamics of thermal and quantum gases, we conclude that the quantum gas is only affected via thermal coupling to the non-condensed part for a broad range of correlation times.

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QuCoLiMa Talks are the weekly seminar of the collaborative research center TRR 306 QuCoLiMa (Quantum Cooperativity of Light and Matter). The talks are given by (external) experts, whose research falls within the scope of QuCoLiMa.

More information at www.qucolima.de/talks.