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arXiv quant-ph/0605033quant-ph
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带隙共同环境诱导的量子比特纠缠

Entanglement between qubits induced by a common environment with a gap

Sangchul Oh, Jaewan Kim

摘要:

我们研究了一个由两个量子比特组成的系统,该系统由两个自旋玻色子模型描述。我们展示了环境的两个相互竞争的角色:诱导两个量子比特之间的纠缠和使它们退相干。对于单个谐振子的环境,如果其频率与诱导的两个量子比特耦合强度相称,则两个量子比特可以最大程度地纠缠,并且环境可以是可分离的。在玻色子浴环境的情况下,其谱密度函数的间隙对于在平衡时在两个量子比特之间产生纠缠以及将其用作量子数据总线是必不可少的。

英文摘要:

We study a system of two qubits interacting with a common environment, described by a two-spin boson model. We demonstrate two competing roles of the environment: inducing entanglement between the two qubits and making them decoherent. For the environment of a single harmonic oscillator, if its frequency is commensurate with the induced two-qubit coupling strength, the two qubits could be maximally entangled and the environment could be separable. In the case of the environment of a bosonic bath, the gap of its spectral density function is essential to generate entanglement between two qubits at equilibrium and for it to be used as a quantum data bus.

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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