Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session M04: Asking Big-Picture Questions Using Atomic PhysicsInvited Live
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Chair: Lindsay LeBlanc, Alberta |
Wednesday, June 2, 2021 2:00PM - 2:30PM Live |
M04.00001: Exploring new scientific frontiers with programmable atom arrays Invited Speaker: Mikhail Lukin 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. |
Wednesday, June 2, 2021 2:30PM - 3:00PM Live |
M04.00002: Asking big-picture questions using atomic and nuclear clocks Invited Speaker: Marianna S Safronova The extraordinary advances in quantum control of matter and light have been transformative for precision measurements enabling probes of the most basic laws of Nature to gain a fundamental understanding of the physical Universe. Exceptional versatility, inventiveness, and rapid development of precision experiments supported by continuous technological advances and improved theory give a very high chance for paradigm-shifting discovery. The development of atomic clocks with systematic uncertainties in the 10-18 range enables searches for the variation of fundamental constants, dark matter, and violations of Lorentz invariance. I will give an overview of new ideas for dark matter searches with clocks, including prospects for significantly improved sensitivity with highly charged ions and a nuclear clock. I will also report a release of the new online portal for high-precision atomic data and computation |
Wednesday, June 2, 2021 3:00PM - 3:30PM Live |
M04.00003: Studying tunneling times using Bose-condensed atoms Invited Speaker: Aephraim M Steinberg The question of how long a particle spends in a tunnel barrier – like most questions about the “history” of quantum systems – has been contentious for the greatest part of a century. I will describe our ongoing experiments(2), which use a “Larmor clock” to measure the time ultracold Rubidium atoms spend inside a 1-micron tunnel barrier formed by a focused laser beam. In particular, we observe that contrary to intuition, lower-energy particles tunnel through the barrier “faster” than higher-energy ones, and faster than they would through a lower barrier(3). I will discuss our plans to probe where within a barrier atoms spend their time, as well as recent theory concluding that mere observation of particles inside the barrier can “collapse” them, enhancing their transmission probability. This latest work suggests a definition for a new, position-dependent, escape time, which we will undertake to measure in future experiments. |
Wednesday, June 2, 2021 3:30PM - 4:00PM Live |
M04.00004: Designing a quantum phase transition in a resonantly driven optical lattice Invited Speaker: Ulrich Schneider Phase transitions and critical phenomena have been at the heart of cold atom experiments from the beginning. While almost all phase transitions in cold atoms systems are continuous, there is a renewed interest in discontinuous (first-order) phase transitions and the associated metastable states, whose relativistic analogues are believed to play an important role in early-universe cosmology (false vacuum decay). |
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