Bulletin of the American Physical Society
2021 Fall Meeting of the APS Division of Nuclear Physics
Volume 66, Number 8
Monday–Thursday, October 11–14, 2021; Virtual; Eastern Daylight Time
Session DN: Minisymposium: Developments in Quantum Simulations for Nuclear Physics I |
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Chair: Natalie Klco, Caltech Room: Studio 1 |
Tuesday, October 12, 2021 9:30AM - 10:06AM |
DN.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, testing of quantum optimization algorithms, realization of novel architectures and implications for simulating complex lattice gauge theories using such systems will be discussed. |
Tuesday, October 12, 2021 10:06AM - 10:18AM |
DN.00002: Scalable cold-atom quantum simulator for two-dimensional QED Robert Ott, Torsten V Zache, Fred Jendrzejewski, Jürgen Berges We propose a scalable analog quantum simulator for quantum electrodynamics (QED) in two spatial dimensions. The proposed setup for the U(1) lattice gauge field theory employs inter-species spin-changing collisions in an ultra-cold atomic mixture trapped in an optical lattice. We use this four-body process to engineer spatial plaquette terms for magnetic fields, thus solving a major obstacle towards experimental realizations of realistic gauge theories in higher dimensions. We apply our approach to the pure gauge theory of compact QED and discuss how the phenomenon of confinement of electric charges can be described by the quantum simulator. |
Tuesday, October 12, 2021 10:18AM - 10:30AM |
DN.00003: Heat Transport in the Unitary Fermi Gas Zhenjie Yan, Parth B Patel, Biswaroop Mukherjee, Christopher J Vale, Richard Fletcher, Martin W Zwierlein The transport of heat provides a crucial window into the dynamical processes in a unitary Fermi gas. It can distinguish states of matter and offers powerful insights into the underlying microscopic mechanisms of transport. Employing radiofrequency spectroscopy as a local thermometer, we directly observe a striking signature of the superfluid phase transition in a unitary Fermi gas: while in a normal fluid, heat propagates diffusively, below the superfluid transition temperature heat propagates as a wave known as second sound. From the damping time of heat diffusion we obtain the thermal conductivity, while the speed and damping of second sound yield the superfluid density and the second sound diffusivity. The diffusivity displays a peak at the phase transition temperature, resembling the critical behavior found in liquid 4He. Our results inform theories of transport in strongly interacting fermionic matter, from nuclear matter to strongly correlated superconductors and quark-gluon plasma. |
Tuesday, October 12, 2021 10:30AM - 10:42AM |
DN.00004: Scalar Electrodynamics with Configurable Rydberg Atoms Arrays? Yannick L Meurice, Alexander Keesling We present a quantum Hamiltonian for scalar electrodynamics in one and two spatial dimensions where |
Tuesday, October 12, 2021 10:42AM - 10:54AM |
DN.00005: Cold-atom regularizations of strongly-coupled four-Fermi field theories in 2+1 dimensions Alejandro Bermudez, Lukas Ziegler, Emanuele Tirrito, Maciej A Lewenstein, Simon J Hands In this talk, I will disucss how ultra-cold atoms with synthetic spin-orbit coupling in Raman lattices can be used as versatile quantum simulators of strongly-coupled four-Fermi field theories related to Gross-Neveu-Wilson models in (2+1) dimensions. I will present large-N results that support the appearance of a quantum anomalous Hall (QAH) effect associated to a correlated topological insulator, the boundaries of which are controlled by strongly-coupled fixed points of the four-Fermi relativistic field theory. In the strong coupling limit, this lattice model maps onto a two-dimensional quantum compass model in a transverse field, which can be studied using a variational ansatz based on projected entangled pairs. |
Tuesday, October 12, 2021 10:54AM - 11:06AM |
DN.00006: SU(2) hadrons on a quantum computer Jinglei Zhang, Yasar Atas, Randy Lewis, Amin Jahanpour, Jan F Haase, Christine A Muschik We realize, for the first time, a non-Abelian gauge theory with dynamically coupled matter on a quantum computer. This enables the observation of hadrons and the calculation of their associated masses. The SU(2) gauge group considered here represents an important first step towards ultimately studying quantum chromodynamics, the theory that describes the properties of protons, neutrons and other hadrons. Quantum computers have the potential to create important new opportunities for ongoing essential research on gauge theories by providing simulations that are unattainable on classical computers such as sign-problem afflicted models or time evolutions. Our calculations on an IBM superconducting platform utilize a variational quantum eigensolver to study both meson and baryon states, hadrons which have never been seen in a non-Abelian simulation on a quantum computer. We develop a resource-efficient approach that not only allows the implementation of an SU(2) gauge theory with dynamical matter fields on present-day quantum hardware, but further lays out the premises for future quantum simulations that will address currently unanswered questions in particle and nuclear physics. |
Tuesday, October 12, 2021 11:06AM - 11:18AM |
DN.00007: Quantum Simulation of Non-equilibrium Dynamics and Thermalization of the Schwinger Model Xiaojun Yao, Wibe A De Jong, Kyle Lee, James Mulligan, Mateusz A Ploskon, Felix M Ringer Quantum computing has drawn significant interest from the nuclear and particle physics community since it may provide a method to overcome the notorious sign problem when one tries to numerically compute observables on a lattice. With the NISQ era coming, we expect to see wide applications of the quantum computing in the understanding of the real time dynamics of the quantum field theory in vacuum and at finite temperature. For such applications at finite temperature, it is essential to prepare an initial thermal state efficiently, which is not an easy task. |
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