Entanglement of superconducting qubits via acceleration radiation.
Entanglement of superconducting qubits via acceleration radiation.
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DOI：
10.1038/s41598-017-00770-z
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发表时间：
2017-04-06
影响因子：
4.6
通讯作者：
Sabín C
中科院分区：
文献类型：
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作者：
García-Álvarez L;Felicetti S;Rico E;Solano E;Sabín C
我们证明了模拟的相对论运动可以在人造原子之间产生纠缠，并保护它们免受自发辐射的影响。我们考虑一对超导量子比特耦合到谐振器模式，其中耦合强度的调制可以模拟量子比特在相对论速度下的谐波运动，产生加速辐射。我们找到了当量子比特初始处于基态时，在它们之间产生稳态纠缠态的最佳可行条件。此外，我们分析了运动对自发辐射概率的影响，在标准的单原子和双原子超辐射的情况下，其中一个或两个激发最初存在。最后，我们表明，相对论运动诱导子辐射，可以产生类Zeno效应，保持辐射衰变的激发。
We show that simulated relativistic motion can generate entanglement between artificial atoms and protect them from spontaneous emission. We consider a pair of superconducting qubits coupled to a resonator mode, where the modulation of the coupling strength can mimic the harmonic motion of the qubits at relativistic speeds, generating acceleration radiation. We find the optimal feasible conditions for generating a stationary entangled state between the qubits when they are initially prepared in their ground state. Furthermore, we analyse the effects of motion on the probability of spontaneous emission in the standard scenarios of single-atom and two-atom superradiance, where one or two excitations are initially present. Finally, we show that relativistic motion induces sub-radiance and can generate a Zeno-like effect, preserving the excitations from radiative decay.