Coherent coupling of a trapped electron to a distant superconducting microwave cavity
Coherent coupling of a trapped electron to a distant superconducting microwave cavity
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DOI：
10.1063/5.0023002
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发表时间：
2020-10
影响因子：
4
通讯作者：
A. Cridland Mathad;J. Lacy;J. Pinder;A. Uribe;R. Willetts;Raquel Alvarez;J. Verdú
中科院分区：
文献类型：
--
作者：
A. Cridland Mathad;J. Lacy;J. Pinder;A. Uribe;R. Willetts;Raquel Alvarez;J. Verdú
从理论上研究了平面Penning陷阱中单电子与远距离超导微波腔的耦合。当谐振腔的负载品质因数Q=105时，耦合频率可达到Ω=2π·1 MHz左右，具有较强的耦合特性。电子和腔形成一个由两个耦合的量子谐振子组成的系统。这是一个混合线性微波量子网络。结果表明，相干相互作用可以在几毫米到几厘米的距离内保持。与经典的线性微波电路类似，光子的相干量子交换是由电子和腔的阻抗决定的。作为一个具体的应用，我们讨论了位于两个不同陷阱中的两个电子的回旋运动的纠缠。
We theoretically investigate the coupling of a single electron in a planar Penning trap with a remote superconducting microwave (MW) cavity. Coupling frequencies around Ω = 2 π · 1 MHz can be reached with resonators with a loaded quality factor of Q = 10 5, allowing for the strong coupling regime. The electron and the cavity form a system of two coupled quantum harmonic oscillators. This is a hybrid and linear microwave quantum network. We show that the coherent interaction can be sustained over distances of a few mm up to several cm. Similar to classical linear MW circuits, the coherent quantum exchange of photons is ruled by the impedances of the electron and the cavity. As one concrete application, we discuss the entanglement of the cyclotron motions of two electrons located in two separate traps.