论文标题
偶性耦合对纠缠存储设备的影响
Effects of dipolar coupling on an entanglement storage device
论文作者
论文摘要
量子计算需要有效的长期存储设备来保留量子状态。这种存储设备的有吸引力的候选者是连接到常见耗散环境的Qubits。共同的环境会导致这些量子系统中的持续纠缠。因此，这些系统有效地充当纠缠的存储装置。但是，一个共同环境的存在通常需要量子位的物理接近，因此导致量子位之间直接偶极耦合。在这项工作中，我们研究了使用最近宣传的波动调节的量子主方程对偶极耦合对环境诱导的纠缠的总效应[A. Chakrabarti和R. Bhattacharyya，物理。 Rev. A 97，063837（2018）]。我们表明，偶极耦合的非二核部分导致纠缠降低，因此存储设备的效率较低。我们还讨论了有效存储的特性，从而减轻了偶极耦合对存储的纠缠的有害影响。
Quantum computation requires efficient long-term storage devices to preserve quantum states. An attractive candidate for such storage devices is qubits connected to a common dissipative environment. The common environment gives rise to persistent entanglements in these qubit systems. Hence these systems act efficiently as a storage device of entanglement. However, the existence of a common environment often requires the physical proximity of the qubits and hence results in direct dipolar coupling between the qubits. In this work, we investigate the total effect of the dipolar coupling on the environment-induced entanglement using a recently-proposed fluctuation-regulated quantum master equation [A. Chakrabarti and R. Bhattacharyya, Phys. Rev. A 97, 063837 (2018)]. We show that nonsecular part of the dipolar coupling results in reduced entanglement and hence less efficiency of the storage devices. We also discuss the properties of efficient storage that mitigates the detrimental effects of the dipolar coupling on the stored entanglement.
