Spectral Decomposition of Green’s Functions of Open Quantum Systems

ORAL

Abstract

We derive a Lehmann-style representation of spectral functions of Markovian driven-dissipative
systems, and discuss how this can be employed to obtain physical intuition. Focusing on a specific
model of a non-linear driven Kerr cavity, we discuss the connections between spectral functions
changing sign and population inversion in the steady state. Surprisingly, we find that dissipation
can change the sign of spectral functions, with direct physical implications, even in absence of steady
state population inversion

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Presenters

  • Marco Schiro

    Institut de Physique Théorique, Institute for Theorethical Physics, CEA Saclay, CNRS, Institute de Physique Théorique-CEA/Saclay, Université Paris Saclay, CNRS, France, Gif-sur-Yvette

Authors

  • Marco Schiro

    Institut de Physique Théorique, Institute for Theorethical Physics, CEA Saclay, CNRS, Institute de Physique Théorique-CEA/Saclay, Université Paris Saclay, CNRS, France, Gif-sur-Yvette

  • Orazio Scarlatella

    Institute for Theorethical Physics, CEA Saclay, CNRS, Institute de Physique Théorique-CEA/Saclay, Université Paris Saclay, France, Gif-sur-Yvette

  • Aashish Clerk

    Institute for Molecular Engineering, University Of Chicago, Molecular Engineering, Institute for Molecular Engineering at the University of Chicago, Institute for Molecular Engineering, University of Chicago, University of Chicago