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arXiv 0710.3576cond-mat.mes-hall
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共同耗散环境诱导的电荷量子比特间的纠缠

Entanglement between charge qubits induced by a common dissipative environment

L. D. Contreras-Pulido, R. Aguado

摘要:

我们研究了两个电荷量子比特在普通玻色子环境(欧姆浴)中由于强耦合而产生的纠缠。与玻色子浴的耦合是量子噪声(导致退相干)和量子比特之间的间接相互作用的来源。其结果是,两种效果竞争作为与浴耦合强度的函数:纠缠产生和浴诱导的电荷本地化。这两种竞争效应导致了作为与浴的耦合强度的函数的共存的非单调行为。作为应用,我们给出了基于双量子点的电荷量子比特的结果。

英文摘要:

We study entanglement generation between two charge qubits due to the strong coupling with a common bosonic environment (Ohmic bath). The coupling to the boson bath is a source of both quantum noise (leading to decoherence) and an indirect interaction between qubits. As a result, two effects compete as a function of the coupling strength with the bath: entanglement generation and charge localization induced by the bath. These two competing effects lead to a non-monotonic behavior of the concurrence as a function of the coupling strength with the bath. As an application, we present results for charge qubits based on double quantum dots.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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