Robustness of quantum gates with hybrid spin-photon qubits in superconducting resonators
Robustness of quantum gates with hybrid spin-photon qubits in superconducting resonators
复制标题
超导谐振器中具有混合自旋光子量子位的量子门的鲁棒性
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
S. Carretta
中科院分区：
文献类型：
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作者：
A. Chiesa;D. Gerace;F. Troiani;G. Amoretti;P. Santini;S. Carretta
我们讨论了在超导谐振腔和自旋综组成的量子比特中实现量子信息处理的可扩展方案。该方案基于混合双轨编码，允许通过移动谐振器频率来执行单量子比特和双量子比特门。我们通过主方程方法模拟驱动动力学来估计量子门保真度。高保真度也可以在主要退相干源存在的情况下实现，即，腔光子损耗，以及涉及双量子比特门的超导元件的纯脱相。这一结果允许设想这些元素的可扩展性，以一个由混合自旋光子量子比特阵列组成的量子计算架构。为了简化第一个原理验证实验的实现，我们在这里提出了一个更简单的、不可扩展的设置，得到了类似的结果。
We discuss a scalable scheme for the implementation of quantum-information processing in qubits formed by superconducting resonators and spin ensembles. The scheme is based on a hybrid dual-rail encoding, which allows one to perform both single- and two-qubit gates by shifting the resonator frequency. We estimate the quantum-gate fidelity by simulating the driven dynamics through a master-equation approach. High values of the fidelity can be achieved also in the presence of the main decoherence sources, namely, cavity-photon loss, and pure dephasing of the superconductive elements that are involved in the two-qubit gates. This result allows envisioning the scalability of such elements to a quantum-computing architecture made of an array of hybrid spin-photon qubits. Analogous results are obtained for a simpler, nonscalable setup, which we propose here in order to simplify the realization of the first proof-of-principle experiments.