论文标题
Ancilla介导的Qubit读数和预言晶体中稀土掺杂剂之间的纠缠
Ancilla mediated qubit readout and heralded entanglement between rare-earth dopant ions in crystals
论文作者
论文摘要
由于其长期激发的寿命，晶体中的稀土离子被广泛用于量子应用中。为了允许单个离子的量子状态的光学读数，我们建议用附近的附近离子添加晶体，并具有较短的辐射寿命。我们展示了贝叶斯分析如何用辅助离子的光学信号来耗尽有关量子状态的信息。我们研究了不一致过程的影响，并提出了减少其对读数影响的方法。最后，我们将架构扩展到驻留在两个远程空腔中的离子，并显示了对两个Ancilla离子的荧光信号的持续监测导致量子离子的纠缠。
Owing to their long excited state lifetimes, rare-earth ions in crystals are widely used in quantum applications. To allow optical readout of the qubit state of individual ions, we propose to dope the crystal with an additional nearby ancilla ion with a shorter radiative lifetime. We show how a Bayesian analysis exhausts the information about the state of the qubit from the optical signal of the ancilla ion. We study the effects of incoherent processes and propose ways to reduce their effect on the readout. Finally, we extend the architecture to ions residing in two remote cavities, and we show how continuous monitoring of fluorescence signals from the two ancilla ions leads to entanglement of the qubit ions.
