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arXiv 1408.7015quant-ph
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具有中间耦合的机电系统中的高保真度量子态转移

High fidelity quantum state transfer in electromechanical systems with intermediate coupling

Jian Zhou, Yong Hu, Zhang-qi Yin, Z. D. Wang, Shi-Liang Zhu, Zheng-Yuan Xue

摘要:

混合量子系统通常由两个或多个子系统组成,它们可以利用不同系统的优点。近年来,由电路机电子系统组成的混合系统由于其先进的制造工艺和可扩展的集成光路技术而引起了人们的极大关注。在这里,我们提出了一个方案,高保真量子态转移之间的超导量子比特和金刚石中的氮空位中心,这是耦合到超导传输线谐振器的耦合强度$g_1$和纳米机械谐振器的耦合强度$g_2$,分别。同时,两个谐振器以耦合强度$J$参数耦合。系统动力学,包括退相干效应,数值研究。研究发现,在技术进步之前,这种混合系统的小耦合区($J \ll \{g_1, g_2\}$)和大耦合区($J \gg \{g_1, g_2\}$)都不能支持高保真度的量子态转移。然而,在中间耦合机制($J \sim g_1 \sim g_2$)中,与传统观点相反,可以实现高保真度量子信息传输,提供了在类似耦合谐振器系统中实现高保真度量子态传输的有希望的途径。

英文摘要:

Hybrid quantum systems usually consist of two or more subsystems, which may take the advantages of the different systems. Recently, the hybrid system consisting of circuit electromechanical subsystems have attracted great attention due to its advanced fabrication and scalable integrated photonic circuit techniques. Here, we propose a scheme for high fidelity quantum state transfer between a superconducting qubit and a nitrogen-vacancy center in diamond, which are coupled to a superconducting transmission-line resonator with coupling strength $g_1$ and a nanomechanical resonator with coupling strength $g_2$, respectively. Meanwhile, the two resonators are parametrically coupled with coupling strength $J$. The system dynamics, including the decoherence effects, is numerical investigated. It is found that both the small ($J \ll \{g_1, g_2\}$) and large ($J \gg \{g_1, g_2\}$) coupling regimes of this hybrid system can not support high fidelity quantum state transfer before significant technique advances. However, in the intermediate coupling regime ($J \sim g_1 \sim g_2$), in contrast to a conventional wisdom, high fidelity quantum information transfer can be implemented, providing a promising route towards high fidelity quantum state transfer in similar coupled resonators systems.

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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