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Chinese Physics Letters

Stationary Entanglement of Two Charge Qubits Induced by a Damped and Driven Cavity

李军刚, 邹健, 蔡金芳, 邵彬

Published Jan 1, 2006• 0 citations
OpenAlex

Abstract

在一个抑制的驾驶的洞内定位的二费用 qubits 被考虑。在二 qubits 之间的纠纷的 Thedynamical 进化是表明的经分解或数字地，与洞驱散，在 twoqubits 之间的稳定的纠纷对洞 field'sinitial 状态的 qubits，而是独立人士的起始的状态敏感，这被发现。开始处于可分离、很混合的状态的二 qubits 能更容易被纠缠。外部域能被用来提高在二 chargequbits 之间的稳定的纠纷。

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Two charge qubits located inside a damped driven cavity is considered. The dynamical evolution of the entanglement between the two qubits is demonstrated analytically or numerically. It is found that with the cavity dissipation, the steady entanglement between the two qubits is sensitive to the initial state of the qubits, but independent of the cavity field's initial state. The two qubits initially in the separable and most mixed state can be more easily entangled. The external field can be used to enhance the steady entanglement between the two charge qubits.
Two charge qubits being coupled to a damped cavity with different couplings are considered. The dynamical evolution of the entanglement between the two qubits is demonstrated analytically or numerically. It is found that with the cavity dissipation, the steady entanglement between the two qubits can be achieved. The two qubits being initially in the separable and most mixed state can be easily induced to a steady entangled state, and the relative difference of the couplings can be used to enhance the steady entanglement between the two charge qubits.