Comparison between decoherence time for a two-state spin ½ system with its corresponding quantum retrieval period

The evolution of a two-state quantum system (a spin ½ particle) in both the framework of standard quantum mechanics and under the decoherence regime is considered. The former approach on this issue is the well-known quantum flipping process of a dichotomic system subjected to a time-dependent magnet...

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Bibliographic Details
Published in:Central European journal of physics 2011-12, Vol.9 (6), p.1410-1420
Main Authors: Shafiee, Afshin, Tirandaz, Arash
Format: Article
Language:English
Subjects:
Biological and Medical Physics
Biophysics
decoherence
decoherence time
Environmental Physics
Geophysics/Geodesy
Physical Chemistry
Physics
Physics and Astronomy
quantum flipping
quantum to classical transition
Research Article
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Summary:The evolution of a two-state quantum system (a spin ½ particle) in both the framework of standard quantum mechanics and under the decoherence regime is considered. The former approach on this issue is the well-known quantum flipping process of a dichotomic system subjected to a time-dependent magnetic field. In the latter approach, the Spin-Boson model is utilized to describe the interaction of system with its environment and the Born-Markov master equation is derived to obtain the decoherence time. It is possible to show that under certain conditions, one may find a potential conflict between the predictions of decoherence theory and the result observed in a typical quantum flipping experiment.
ISSN:1895-1082
2391-5471
1644-3608
2391-5471
DOI:10.2478/s11534-011-0047-y