Q-FARM Seminar: Many-body physics and self-organization with atoms and photons
11:30am - Buffet lunch
11:45am - 10 min Graduate Student/Postdoc 10min talk
12:00pm - Main talk
ZOOM link (id: 914 8268 2357); Password: 999112
Dissipation and fluctuations are known to be sources of order in complex non-linear systems formed by many agents, as they lead to the generation of self-organized spatial or temporal structures. However, dissipation is considered to produce loss of coherence in open quantum systems, contributing to the inherent fragility of quantum states. Here, I will discuss how coherent behavior emerges in large quantum systems consisting of many atoms if dissipation is collective, in the form of correlated photon emission and absorption. In particular, I will examine the many-body out-of-equilibrium physics of atomic arrays, and focus on the problem of Dicke superradiance, where a collection of excited atoms synchronizes as they decay, emitting a short and intense pulse of light. Superradiance remains an open problem in extended systems due to the exponential growth of complexity with atom number. I will show that superradiance is a universal phenomenon in ordered arrays. Our predictions can be tested in state of the art experiments with arrays of neutral atoms, molecules, and solid-state emitters and pave the way towards understanding the role of many-body decay in quantum simulation, metrology, and lasing.
Research interests: quantum optics, many-body physics, open quantum systems, light-matter interaction, optics, quantum information
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