System-environment coupling derived by Maxwell's boundary conditions from the weak to the ultrastrong light-matter-coupling regime

Motoaki Bamba and Tetsuo Ogawa
Phys. Rev. A 88, 013814 – Published 9 July 2013

Abstract

In the standard theory of cavity quantum electrodynamics (QED), coupling between photons inside and outside a cavity (cavity system and environment) is given conserving the total number of photons. However, when the cavity photons (ultrastrongly) interact with atoms or excitations in matters, the system-environment coupling must be determined from a more fundamental viewpoint. Based on the Maxwell's boundary conditions in the QED theory for dielectric media, we derive the quantum Langevin equation and input-output relation, in which the total number of polaritons (not photons) inside the cavity and photons outside is conserved.

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  • Received 14 January 2013

DOI:https://doi.org/10.1103/PhysRevA.88.013814

©2013 American Physical Society

Authors & Affiliations

Motoaki Bamba* and Tetsuo Ogawa

  • Department of Physics, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan

  • *bamba@acty.phys.sci.osaka-u.ac.jp

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Vol. 88, Iss. 1 — July 2013

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