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arXiv 2505.02497quant-phcond-mat.mes-hall
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多模系统中薛定谔猫态贝尔态的快速初始化

Fast initialization of Bell states with Schrödinger cats in multi-mode systems

Miriam Resch, Ciprian Padurariu, Björn Kubala, Joachim Ankerhold

AI总结:

本文提出通过绝热和非绝热切换Kerr型哈密顿量,高效变换多模猫态,直接初始化纠缠贝尔态,避免从Fock态初始化,为猫量子比特纠缠提供快速方案。

摘要:

薛定谔猫态在连续变量量子信息技术应用中扮演重要角色。作为宏观叠加态,它们固有地受到保护,免受某些类型的噪声影响,使猫量子比特成为量子计算的有前景候选者。最近已表明,在驱动Kerr参量振荡器(KPOs)中,猫态作为具有偶数和奇数宇称的简并基态自然出现,通过关闭驱动,它们绝热连接到相应的最低两个Fock态。为了执行多个猫量子比特的操作,一个关键任务是创建它们之间的纠缠。在这里,我们展示了通过绝热和非绝热切换具有简并基态流形的Kerr型哈密顿量,实现多模猫态的高效变换。这些变换可直接用于将猫态初始化为纠缠的贝尔态,而不是从纠缠的Fock态初始化。

英文摘要:

Schrödinger cat states play an important role for applications in continuous variable quantum information technologies. As macroscopic superpositions they are inherently protected against certain types of noise making cat qubits a promising candidate for quantum computing. It has been shown recently that cat states occur naturally in driven Kerr parametric oscillators (KPOs) as degenerate ground states with even and odd parity that are adiabatically connected to the respective lowest two Fock states by switching off the drive. To perform operations with several cat qubits one crucial task is to create entanglement between them. Here, we demonstrate efficient transformations of multi-mode cat states through adiabatic and diabatic switching between Kerr-type Hamiltonians with degenerate ground state manifolds. These transformations can be used to directly initialize the cats as entangled Bell states in contrast to initializing them from entangled Fock states.

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。

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