arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0908.0316quant-phcond-mat.other
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基于纳米机电谐振器阵列的量子自旋传感器

A quantum spin transducer based on nano electro-mechancial resonator arrays

P. Rabl, S. J. Kolkowitz, F. H. Koppens, J. G. E. Harris, P. Zoller, M. D. Lukin

摘要:

量子信息处理的实现面临着将避免退相干的良好隔离与控制多体量子系统中相干相互作用的能力相结合的矛盾要求。例如,电子和原子核的自旋自由度由于它们与环境的弱磁相互作用而提供了良好的量子记忆。然而,出于同样的原因,很难在大于几十纳米的距离上实现自旋的受控纠缠。在这里,我们提出了一个通用的实现的电子自旋量子比特的量子数据总线的自旋耦合到磁化的机械谐振器通过磁场梯度的运动。假设机械系统是带电的,则与自旋量子位相关联的磁矩可以被有效地放大,以使得能够经由库仑力在长距离上进行相干自旋-自旋耦合。我们的方法适用于广泛的一类电子自旋量子比特,可以本地化附近的磁化尖端,并可用于实现混合量子计算架构。

英文摘要:

Implementation of quantum information processing faces the contradicting requirements of combining excellent isolation to avoid decoherence with the ability to control coherent interactions in a many-body quantum system. For example, spin degrees of freedom of electrons and nuclei provide a good quantum memory due to their weak magnetic interactions with the environment. However, for the same reason it is difficult to achieve controlled entanglement of spins over distances larger than tens of nanometers. Here we propose a universal realization of a quantum data bus for electronic spin qubits where spins are coupled to the motion of magnetized mechanical resonators via magnetic field gradients. Provided that the mechanical system is charged, the magnetic moments associated with spin qubits can be effectively amplified to enable a coherent spin-spin coupling over long distances via Coulomb forces. Our approach is applicable to a wide class of electronic spin qubits which can be localized near the magnetized tips and can be used for the implementation of hybrid quantum computing architectures.

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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