Keldysh Approach to Driven-Dissipative Phase Transition in a Kerr Oscillator
ORAL
Abstract
We study open quantum many-body physics using a minimal model, namely a Kerr non-linear oscillator subject to two-photon driving and single-photon dissipation. Exact solutions are provided by coherently tying together several methods such as mean field theory, exact diagonalization, and Keldysh field theory. Spectral properties are given analytically using the Keldysh formalism (both the spectral function of the oscillator and the power-spectrum of the emitted photons). Then using the quantum Langevin equation, finite-size scaling is calculated exactly.
Ref: arXiv:2007.01422
Ref: arXiv:2007.01422
*We acknowledge support from the Division of Materials Sciences and Engineering, Office of Basic Energy Sciences, U.S. Department of Energy, under Award No. DE-SC0005237. XZ was also supported in part by Brookhaven National Laboratory’s LDRD project No. 20-024.
–
Presenters
-
Xin H. H. Zhang
- Duke University