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Updated: Aug 1, 2025

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
Exceptional points treatment of cavity spectroscopies
Shaul Mukamel1, Anqi Li2, Michael Galperin2
1Department of Chemistry, University of California Irvine, Irvine, California 92697, USA.
Abstract:
The infrared response of a system of two vibrational modes in a cavity is calculated by an effective non-Hermitian Hamiltonian derived by employing the nonequilibrium Green's function (NEGF) formalism. Degeneracies of the Hamiltonian (exceptional points, EPs) widely employed in theoretical analysis of optical cavity spectroscopies are used in an approximate treatment and compared with the full NEGF. Qualitative limitations of the EP treatment are explained by examining the approximations employed in the calculation.
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