论文标题
在存在热波动的情况下，有效地沿量子链传递纠缠
Efficient transfer of entanglement along a qubit chain in the presence of thermal fluctuations
论文作者
论文摘要
量子通信需要有效地以高保真度实施量子状态运输。在这里，我们考虑沿着Qubit链的纠缠的运输。一系列涉及连续的Qubit对的掉期操作可以沿着链条运输纠缠。我们报告说，在存在驱动器诱导的分流的情况下，上述门的保真度具有对应于驱动幅度的最佳值的最大值。为了纳入环境效应，我们使用先前报道的波动调节的量子主方程[A. Chakrabarti和R. Bhattacharyya，物理。 Rev. A 97，063837（2018）]。最佳驱动振幅的存在意味着这些开放量子系统上的一系列换档操作将具有纠缠的最佳传输速度。
Quantum communications require efficient implementations of quantum state transportation with high fidelity. Here, we consider the transport of entanglement along a chain of qubits. A series of SWAP operations involving successive pairs of qubits can transport entanglement along the chain. We report that the fidelity of the abovementioned gate has a maximum value corresponding to an optimum value of the drive amplitude in the presence of drive-induced decoherence. To incorporate environmental effect, we use a previously reported fluctuation-regulated quantum master equation [A. Chakrabarti and R. Bhattacharyya, Phys. Rev. A 97, 063837 (2018)]. The existence of an optimum drive amplitude implies that these series of SWAP operations on open quantum systems would have an optimal transfer speed of the entanglement.
