论文标题
两个远程机械谐振器之间的快速有效的确定性量子状态转移
Fast and efficient deterministic quantum state transfer between two remote mechanical resonators
论文作者
论文摘要
长距离量子通信中确定性量子状态转移的主要挑战是通信渠道中的传输损失。为了克服这一限制，我们在这里使用绝热定理，并在两种远程机械模式之间找到无损的演化路径。通过两个节点和中间光通道模式之间有效耦合强度的绝热变化，我们为量子状态转移的传输路径与衰减光纤模式解耦。使用我们提出的方法，我们表明一个人以高效率获得了量子状态转移。此外，为了绕过绝热过程的慢速性质及其对机械阻尼和噪声的敏感性以及驾驶脉冲的强度，我们为我们提出的量子态转移开发了快捷方式到绝热通道方案。我们的结果表明，绝热性的快捷性即使对于耦合强度的较小值，也提供了有效，快速的量子状态转移。我们表明，长距离量子通信的协议的性能仍然有效地在两个远程机械谐振器之间传输量子状态，相距一百米。
The main challenge in deterministic quantum state transfer in long-distance quantum communications is the transmission losses in the communication channel. To overcome this limitation, here we use the adiabatic theorem and find a lossless evolution path between two remote mechanical modes. By adiabatic variation of the effective coupling strengths between the two nodes and the intermediate optical channel modes, we engineer a transmission path for the quantum state transfer that is decoupled from the decaying fiber modes. Using our proposed method we show that one obtains a quantum state transfer with high efficiency. Furthermore, to bypass the slow nature of the adiabatic process and its sensitivity to the mechanical damping and noise as well as the strength of the driving pulses, we develop the shortcut to adiabatic passage protocol for our proposed quantum state transfer. Our results show that the shortcut to adiabaticity provides an efficient and fast quantum state transfer even for small values of the coupling strength. We show that the performance of our protocol for long-distance quantum communications remains efficient for transferring the quantum states between two remote mechanical resonators being hundred meters apart.
