Entanglement In Two-Site Bose-Hubbard Model With Non-Linear Dissipation
JOURNAL OF MODERN OPTICS(2014)
摘要
In this paper, we study the decoherence and entanglement properties for the two-site Bose-Hubbard model in the presence of a non-linear damping. We apply the techniques of thermo field dynamics and then use Hartree-Fock approximation to solve the corresponding master equation. The expectation values of the approximated field operators appearing in the solution of master equation are computed self-consistently. We solve this master equation for a small time t so that we get the analytical solution, thereby we compute the decoherence and entanglement properties of the solution of the two-mode bosonic system. We have found that for a small initial time t, the entanglement of the system increases but at the same time the system decoheres exponentially.
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关键词
thermo field dynamics, Bose-Hubbard model, master equation, entanglement and decoherence
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