arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1603.04424quant-ph
收藏

基于参数调制纵向耦合的快速高保真纠缠门

Fast and High-Fidelity Entangling Gate through Parametrically Modulated Longitudinal Coupling

Baptiste Royer, Arne L. Grimsmo, Nicolas Didier, Alexandre Blais

摘要:

研究了一种基于量子位-振子耦合调制的普适量子计算方法。我们展示了如何通过同时调制两个量子比特的纵向耦合到一个共同的振荡器模式来实现受控相位门。与更熟悉的横向量子比特-振荡器耦合相反,有效量子比特-量子比特相互作用的大小不依赖于小的微扰参数。结果,可以使该有效相互作用强度变大,从而导致短的栅极时间和高的栅极结晶度。此外,我们展示了如何门失真可以指数抑制压缩和纠缠门可以推广到量子比特耦合到单独的振荡器。我们的建议可以在多个物理平台上实现量子计算,包括超导和自旋量子比特。

英文摘要:

We investigate an approach to universal quantum computation based on the modulation of longitudinal qubit-oscillator coupling. We show how to realize a controlled-phase gate by simultaneously modulating the longitudinal coupling of two qubits to a common oscillator mode. In contrast to the more familiar transversal qubit-oscillator coupling, the magnitude of the effective qubit-qubit interaction does not rely on a small perturbative parameter. As a result, this effective interaction strength can be made large, leading to short gate times and high gate fidelities. We moreover show how the gate infidelity can be exponentially suppressed with squeezing and how the entangling gate can be generalized to qubits coupled to separate oscillators. Our proposal can be realized in multiple physical platforms for quantum computing, including superconducting and spin qubits.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑