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arXiv 1002.4800cond-mat.mes-hall
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纳米机电系统中量子比特-振子纠缠的检测

Detection of qubit-oscillator entanglement in nanoelectromechanical systems

Thomas L. Schmidt, Kjetil Borkje, Christoph Bruder, Bjoern Trauzettel

摘要:

过去几年的实验表明,有可能使纳米机械谐振器和超导量子比特接近量子体系,并以接近海森堡不确定性极限的精度测量它们的属性。因此,我们将在纳米机械系统中经常看到真正的量子效应,这只是一个时间问题。量子力学的标志之一是纠缠态的存在。我们提出了一个现实的情况下,使其有可能检测纠缠的机械谐振器和量子位在纳机电设置。检测方案仅涉及耦合到振荡器和量子位的原子点接触的标准电流和噪声测量。这种设置可以允许第一次观察固态连续和离散量子系统之间的纠缠。

英文摘要:

Experiments over the past years have demonstrated that it is possible to bring nanomechanical resonators and superconducting qubits close to the quantum regime and to measure their properties with an accuracy close to the Heisenberg uncertainty limit. Therefore, it is just a question of time before we will routinely see true quantum effects in nanomechanical systems. One of the hallmarks of quantum mechanics is the existence of entangled states. We propose a realistic scenario making it possible to detect entanglement of a mechanical resonator and a qubit in a nanoelectromechanical setup. The detection scheme involves only standard current and noise measurements of an atomic point contact coupled to an oscillator and a qubit. This setup could allow for the first observation of entanglement between a continuous and a discrete quantum system in the solid state.

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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