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Phys. Rev. A 58, 4078 - 4086 (1998)

Dissipation in collective interactions

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C. Saavedra1 *, A. B. Klimov2, S. M. Chumakov2, and J. C. Retamal3
1Institut für Theoretische Physik, Universität Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
2Departamento de Física, Universidad de Guadalajara, Corregidora 500, 44420 Guadalajara, Jalisco, Mexico
3Departamento de Física, Universidad de Santiago de Chile, Casilla 307 Correo 2, Santiago, Chile

Received 4 September 1997; revised 27 May 1998

An approximate solution is given for the interaction of a set of A two-level atoms with a single mode of a quantized radiation field when the field is damped by a reservoir at zero temperature. Assuming that the average photon number is much larger than the number of atoms, we study the influence of dissipation on the approximate factorization of the density matrix. For realistic values of the parameters, the factorization survives under the presence of field damping. The main effect of dissipation is an exponential decay of the average photon number and a loss of coherence among the different factorized states. The influence of field dissipation on the atomic inversion, purity, and field squeezing are studied.


©1998 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.58.4078
DOI: 10.1103/PhysRevA.58.4078
PACS: 42.50.Ct, 42.50.Dv, 42.50.Fx

* Permanent address: Departamento de Física, Universidad de Concepción, Casilla 4009, Concepción, Chile.

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