论文标题
用于在腔磁化中生成磁化的任意量子状态的协议
Protocol for generating an arbitrary quantum state of the magnetization in cavity magnonics
论文作者
论文摘要
我们提出和数字评估一项方案，以在磁体中生成磁化的任意量子状态。该协议涉及反复刺激频率可调的超导转移，并通过微波腔将激发转移到磁铁中。为了避免衰减，该协议必须比镁寿命短得多。通过简单地缩短脉冲来加速协议，从而导致激发泄漏到更高水平的转移，并伴随着较高的逆转。我们讨论如何通过应用反脉冲来推出这些较高水平来纠正此类泄漏。在我们的协议中，最大磁通职业的状态最高为$ \ sim9 $，平均镁数量高达$ \ sim4 $可以使用富达$> 0.75 $生成。
We propose and numerically evaluate a protocol to generate an arbitrary quantum state of the magnetization in a magnet. The protocol involves repeatedly exciting a frequency-tunable superconducting transmon and transferring the excitations to the magnet via a microwave cavity. To avoid decay, the protocol must be much shorter than magnon lifetime. Speeding up the protocol by simply shortening the pulses leads to non-resonant leakage of excitations to higher levels of the transmon accompanied by higher decoherence. We discuss how to correct for such leakages by applying counter pulses to de-excite these higher levels. In our protocol, states with a maximum magnon occupation of up to $\sim9$ and average magnon number up to $\sim4$ can be generated with fidelity $>0.75$.
