Bath‐Induced Collective Phenomena on Superconducting Qubits: Synchronization, Subradiance, and Entanglement Generation,Annalen Der Physik

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Bath‐Induced Collective Phenomena on Superconducting Qubits: Synchronization, Subradiance, and Entanglement Generation
Annalen Der Physik ( IF 2.2 ) Pub Date : 2021-05-03 , DOI: 10.1002/andp.202100038
Marco Cattaneo _{1,

2} , Gian Luca Giorgi ₁ , Sabrina Maniscalco _{2,

3} , Gheorghe Sorin Paraoanu ₃ , Roberta Zambrini ₁

Affiliation

A common environment acting on a pair of qubits gives rise to a plethora of different phenomena, such as the generation of qubit–qubit entanglement, quantum synchronization, and subradiance. Here, time‐independent figures of merit for entanglement generation, quantum synchronization, and subradiance are defined, and an extensive analytical and numerical study of their dependence on model parameters is performed. A recently proposed measure of the collectiveness of the dynamics driven by the bath is also addressed, and it is found that it almost perfectly witnesses the behavior of entanglement generation. The results show that synchronization and subradiance can be employed as reliable local signatures of an entangling common‐bath in a general scenario. Finally, an experimental implementation of the model based on two transmon qubits capacitively coupled to a common resistor is proposed, which provides a versatile quantum simulation platform of the open system in any regime.

中文翻译：

巴斯诱导的超导量子位集体现象：同步，亚辐射和纠缠生成

作用于一对量子位的公共环境会产生大量不同的现象，例如量子位-量子位纠缠的产生，量子同步和亚辐射。在这里，定义了与时间无关的纠缠生成，量子同步和亚辐射度的品质因数，并对它们对模型参数的依赖性进行了广泛的分析和数值研究。还讨论了最近提出的由浴驱动的动力学的集体性的度量，并且发现它几乎完美地见证了纠缠产生的行为。结果表明，在一般情况下，同步和亚辐射度可以用作纠缠公共浴池的可靠本地签名。最后，

更新日期：2021-05-06

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