Quantum teleportation with continuous measurements
Quantum teleportation with continuous measurements
复制标题
DOI：
10.1103/physreva.94.042334
复制
发表时间：
2016-08
影响因子：
2.9
通讯作者：
E. Greplova;K. Mølmer;C. K. Andersen
中科院分区：
文献类型：
--
作者：
E. Greplova;K. Mølmer;C. K. Andersen
我们提出了一个在两个量子比特之间进行量子隐形传态的方案，两个量子比特依次耦合到一个腔场。该方案的实施进行了分析与超导量子比特和传输线谐振器，其中测量被限制为连续探测从谐振器泄漏的场，而不是瞬时投影贝尔状态测量。我们表明，过去的量子态形式主义S。加梅尔马克，B。Julsgaard和K. M\o{}lmer，Phys. Rev. Lett. 111，160401（2013）可以成功地应用于估计在我们的连续信号记录条件下最有可能的贝尔测量结果。这个信息决定了对目标量子比特的哪种局部操作产生最佳的隐形传态保真度。我们的研究结果强调了在非理想漏量子系统中应用前馈协议中量子测量的详细分析的意义。
We propose a scheme for quantum teleportation between two qubits, coupled sequentially to a cavity field. An implementation of the scheme is analyzed with superconducting qubits and a transmission line resonator, where measurements are restricted to continuous probing of the field leaking from the resonator rather than instantaneous projective Bell state measurement. We show that the past quantum state formalism S. Gammelmark, B. Julsgaard, and K. M\o{}lmer, Phys. Rev. Lett. 111, 160401 (2013) can be successfully applied to estimate what would have been the most likely Bell measurement outcome conditioned on our continuous signal record. This information determines which local operation on the target qubit yields the optimal teleportation fidelity. Our results emphasize the significance of applying a detailed analysis of quantum measurements in feedforward protocols in nonideal leaky quantum systems.