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Titolo:
Theory of pseudomodes in quantum optical processes - art. no. 053813
Autore:
Dalton, BJ; Barnett, SM; Garraway, BM;
Indirizzi:
Univ Sussex, Sussex Ctr Opt & Atom Phys, Brighton BN1 9QH, E Sussex, England Univ Sussex Brighton E Sussex England BN1 9QH BN1 9QH, E Sussex, England Univ Queensland, Dept Phys, St Lucia, Qld 4072, Australia Univ QueenslandSt Lucia Qld Australia 4072 St Lucia, Qld 4072, Australia Univ Strathclyde, Dept Phys & Appl Phys, Glasgow G4 0NG, Lanark, Scotland Univ Strathclyde Glasgow Lanark Scotland G4 0NG G4 0NG, Lanark, Scotland
Titolo Testata:
PHYSICAL REVIEW A
fascicolo: 5, volume: 6405, anno: 2001,
pagine: 3813 -
SICI:
1050-2947(200111)6405:5<3813:TOPIQO>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHOTONIC BAND-EDGE; WAVE-FUNCTION APPROACH; MACROSCOPIC CANONICAL QUANTIZATION; WHISPERING-GALLERY MODES; SPONTANEOUS EMISSION; RESONANCE FLUORESCENCE; MASTER EQUATION; FIELD QUANTIZATION; STANDARD MODEL; 2-LEVEL ATOM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
82
Recensione:
Indirizzi per estratti:
Indirizzo: Dalton, BJ Univ Sussex, Sussex Ctr Opt & Atom Phys, Brighton BN1 9QH, E Sussex, England Univ Sussex Brighton E Sussex England BN1 9QH Sussex, England
Citazione:
B.J. Dalton et al., "Theory of pseudomodes in quantum optical processes - art. no. 053813", PHYS REV A, 6405(5), 2001, pp. 3813

Abstract

This paper deals with non-Markovian behavior in atomic systems coupled to a structured reservoir of quantum electromagnetic field modes, with particular relevance to atoms interacting with the field in high-Q cavities or photonic band-gap materials. In cases such as the former, we show that the pseudomode theory for single-quantum reservoir excitations can be obtained by applying the Fano diagonalization method to a system in which the atomic transitions are coupled to a discrete set of (cavity) quasimodes, which in turn are coupled to a continuum set of (external) quasimodes with slowly varying coupling constants and continuum mode density. Each pseudomode can be identified with a discrete quasimode, which gives structure to the actual reservoir of true modes via the expressions for the equivalent atom-true modecoupling constants. The quasimode theory enables cases of multiple excitation of the reservoir to now be treated via Markovian master equations for the atom-discrete quasimode system. Applications of the theory to one, two, and many discrete quasimodes are made. For a simple photonic band-gap model, where the reservoir structure is associated with the true mode density rather than the coupling constants, the single quantum excitation case appears to be equivalent to a case with two discrete quasimodes.

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Documento generato il 26/11/20 alle ore 07:36:19