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Non-Markovian quantum optical processes and pseudomodes

journal contribution
posted on 2023-06-08, 05:07 authored by B J Dalton, Stephen M Barnett, Barry M. GarrawayBarry M. Garraway
Non-Markovian behaviour in atomic systems coupled to a structured reservoir of quantum EM field modes, such as in high Q cavities, is treated using a quasimode description, and the pseudo mode theory for single quantum reservoir excitations is obtained via Fano diagonalisation. The atomic transitions are coupled to a discrete set of (cavity) quasimodes, which are also coupled to a continuum set of (external) quasimodes with slowly varying coupling constants. Each pseudomode corresponds to a cavity quasimode, and the original reservoir structure is obtained in expressions for the equivalent atom-true mode coupling constants. Cases of multiple excitation of the reservoir are now treatable via Markovian master equations for the atom-discrete quasimode system.

History

Publication status

  • Published

Journal

Fortschritte der Physik

ISSN

0015-8208

Issue

10-11

Volume

49

Page range

927-934

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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