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Work Done on a Coherently Driven Quantum System
Mesoscopic and Multilayer Structures Laboratory, Faculty of Science, Department of Physics, University of Dschang, Yaounde, Cameroon
Mesoscopic and Multilayer Structures Laboratory, Faculty of Science, Department of Physics, University of Dschang, Yaounde, Cameroon
- 1 Mesoscopic and Multilayer Structures Laboratory, Faculty of Science, Department of Physics, University of Dschang, Yaounde, Cameroon
- 2 Mesoscopic and Multilayer Structures Laboratory, Faculty of Science, Department of Physics, University of Dschang, Yaounde, Cameroon
Journal of Quantum Information Science·Volume 05 (2015)·Pages 89–102·Published 2 September 2015·DOI10.4236/jqis.2015.53011
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Abstract
We calculate the work done by a Landau-Zener-like dynamical field on two- and three-level quantum system by constructing a quantum power operator. We elaborate a general theory applicable to a wide range of closed-quantum system. We consider the dynamics of the system in the time domain ]- t LZ , t LZ [ (where is the LZ transition time in the sudden limit) where the external pulse changes its sign and its action becomes relevant. The statistical work is evaluated in a period [0, T ] where T ≤t LZ . Our results are observed to be in good qualitative agreement with known results.
KeywordsPower OperatorStatistical WorkLandau-Zener ModelLevel Crossing
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