Online Seminars on Non-Hermitian Physics: #2 Oded Zilberberg
Channel: NH Seminar Series
Date: 2023-05-24

Title: Strongly correlated open system dynamics: From quenched impurity physics to melted exceptional points 

Abstract: In recent years, there has been rapid development in control and manipulation of coherent quantum systems. In reality, however, such coherent effects are always impacted by coupling to an environment. In my talk, I will introduce several cases where the environment competes with the coherent system and induces novel population inversions, thus completely altering the closed system’s signatures. Specifically, I will start by showing how dissipation in driven nonlinear bosonic cavities leads to a dramatic change of the phase diagram, and then move on to generalize such effects to light-matter systems. Note that phase transitions in such systems are commonly appearing alongside exceptional points in the excitation spectra, and I will tell a short tale on how many-body interactions can quench the transition. I will then move to discuss the impact of non-Ohmic noise on coherent transport signatures in quantum wires, and how quantum measurement backaction can induce a population switching in an open double quantum dot device.

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