CQuIC Seminars
Collective Behavior in Long-Range Interacting Dissipative Systems
Presented by Bihui Zhu, University of Colorado, Boulder and University of California, Santa Barbara
The interplay between dissipation and interactions is at the heart of modern quantum systems, and a thorough understanding of it is very important for quantum information and quantum technologies.
Such interplay is in particular relevant for systems experiencing dipolar interactions. However, dealing with them theoretically is complicated because of the long range and anisotropic nature of the interactions. With the fast progresses in recent years, AMO experiments are opening a window for investigating these effects.
In this talk, I will focus on a system of radiating atoms, which experience complex dissipative and dispersive interactions mediated by photons. Although this type of interactions exists in a variety of AMO platforms, a theoretical treatment is mostly limited to small size systems, which tend to underestimate the collective effects induced by long-range interactions. By employing theoretical approaches effective for a large number of atoms, we show that several interesting collective behaviors emerge, ranging from quantum synchronization of an array of atoms, to collective light scattering from an atomic cloud with non-negligible motion, and to the creation of Weyl quasiparticles in a three dimensional dipolar array, signaling the nontrivial role of long-range dipole-dipole interactions. The understanding gained from these studies can have important applications in precision measurement and quantum simulations.
3:30 pm, Thursday, December 15, 2016
PAIS-2540, PAIS
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