Author(s)

Issofa Nsangou^*, Lukong Cornelius Fai

Mesoscopic and Multilayer Structures Laboratory, Faculty of Science, Department of Physics, University of Dschang, Yaounde, Cameroon.

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.

Power Operator, Statistical Work, Landau-Zener Model, Level Crossing

Nsangou, I. and Fai, L. (2015) Work Done on a Coherently Driven Quantum System. Journal of Quantum Information Science, 5, 89-102. doi: 10.4236/jqis.2015.53011.