Imaginary Phases in Two-Level Model with Spontaneous Decay

Details Imaginary Phases in Two-Level Model with Spontaneous Decay Imaginary Phases in Two-Level Model with Spontaneous Decay

2002-07-08

arxiv.org/abs/quant-ph/0207038v2

J.Phys.A36:7461-7467,2003

Physics

Quantum Physics

11 pages, new version, to appear in J. Phys. A

Scientific paper

10.1088/0305-4470/36/26/316

We study a two-level model coupled to the electromagnetic vacuum and to an external classic electric field with fixed frequency. The amplitude of the external electric field is supposed to vary very slow in time. Garrison and Wright [{\it Phys. Lett.} {\bf A128} (1988) 177] used the non-hermitian Hamiltonian approach to study the adiabatic limit of this model and obtained that the probability of this two-level system to be in its upper level has an imaginary geometric phase. Using the master equation for describing the time evolution of the two-level system we obtain that the imaginary phase due to dissipative effects is time dependent, in opposition to Garrison and Wright result. The present results show that the non-hermitian hamiltonian method should not be used to discuss the nature of the imaginary phases in open systems.

Affiliated with

Also associated with

No associations

Rating

Imaginary Phases in Two-Level Model with Spontaneous Decay does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Imaginary Phases in Two-Level Model with Spontaneous Decay, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Imaginary Phases in Two-Level Model with Spontaneous Decay will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-172732