Analog Quantum Simulation of Topological Lattice Models with a Parametric Cavity
Abstract: There has been a growing interest in realizing quantum simulators for physical systems where perturbative methods are ineffective. The scalability and flexibility of circuit quantum electrodynamics (cQED) make it a promising platform to implement various types of simulators, including lattice models of strongly-coupled field theories. Here, we use a multimode superconducting parametric cavity as a hardware-efficient analog quantum simulator, realizing a lattice in synthetic dimensions with complex hopping interactions.
A Trapped Ion Quantum Simulator for Two-Dimensional Spin System
Abstract: Quantum simulations of complex materials address fundamental problems that cannot be analytically solved due to the exponential scaling of the Hilbert space with increasing particle number. Simulations using trapped ions have had remarkable success investigating one-dimensional quantum interacting spin models, and we seek to extend these ideas to two dimensions by exploiting new crystal geometries in a rf Paul trap.
Everything You Always Wanted to Know About Papers (The Human Side of Physics)
Abstract: Physics is a human activity. Doing hard science involves not only having ideas and taking data, but also convincing your peers by communicating your results in a clear fashion. In this talk, I will offer a bit of the editorial perspective from PRL on how scientific knowledge is established in papers. Our main topic will be the way papers are conceived, treated by editors, assessed by peers, and finally published.
Location: PSC 3150
How to Use a Lock-in Amplifier to Improve Your Precision Measurement
Abstract: Electronic signals for precision measurements are extremely small. For periodic signals, lock-in amplifiers improve sensitivity by orders of magnitude. In this presentation, you will learn about the principles and characteristics of lock-in amplifiers and about applying them to NV center and other precision measurements.
Please email Connor Hart (chart@umd.edu) if you plan to attend.
Location: PSC 2136
A Trapped Ion Quantum Simulator for Two-Dimensional Spin System
Abstract: Quantum simulations of complex materials address fundamental problems that cannot be analytically solved due to the exponential scaling of the Hilbert space with increasing particle number. Simulations using trapped ions have had remarkable success investigating one-dimensional quantum interacting spin models, and we seek to extend these ideas to two dimensions by exploiting new crystal geometries in a rf Paul trap.
Probing the 2D SU(N) Fermi-Hubbard Model with ultracold ytterbium
Abstract: The Fermi-Hubbard model (FHM) describes the interplay between kinetic energy and onsite interaction of particles on a lattice. Cold atoms in an optical lattice have proven to be a particularly suitable platform to probe its properties, complementing analytical and numerical simulations. Most of the experimental works, however, have focussed so far on the SU(2) case, featuring spin-1/2 particles. In our experiment, we implement the SU(N) FHM, which describes particles with N spin components and presents a richer and still poorly understood physics compared with the SU(2) case.
Tuning and probing local thermalization of a Floquet-engineered dipolar ensemble
Abstract: We experimentally study the many-body out-of-equilibrium dynamics of a three-dimensional, dipolar-interacting spin system with tunable XYZ Heisenberg anisotropy. We utilize advanced Hamiltonian engineering techniques and leverage the inherent disorder in the system to probe global and local spin autocorrelation functions for various XYZ Hamiltonians.
Large spin atoms in optical lattices
Abstract: Our experimental projects at the Laser Physics Institute (North Paris University) aim at characterizing entanglement for many-body systems made of large spin atoms. For this, we developed two experimental set-ups : one with large-spin strontium fermionic atoms, with spin-independent contact interactions; one with large-spin chromium bosonic atoms, with spin-dependent long-range dipole-dipole interactions.
Cavity Optomechanical Sensing and Manipulation of an Atomic Persistent Current
Abstract: In this talk I will describe our recent theoretical work showing how several problems in atomic superfluid rotation can be addressed using the versatile toolbox of cavity optomechanics [1]. We consider an annular Bose-Einstein condensate, which exhibits dissipationless flow and is a paradigm of rotational quantum physics, inside a cavity excited by optical fields carrying orbital angular momentum.