期刊
PHYSICAL REVIEW A
卷 103, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.103.043706
关键词
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资金
- National Natural Science Foundation of China [92065105, 11774285]
- Natural Science Basic Research Program of Shaanxi [2020JC-02]
This research presents a simple technique to strongly couple a single solid-state spin to microwave photons in a superconducting coplanar waveguide cavity by using a magnetic microsphere. Strong coupling at the single spin level is achieved through virtual magnonic excitations of a nearby micromagnet. The spin-photon coupling strength is significantly enhanced, making it applicable in quantum information processing with strongly coupled solid-state spin-photonic systems.
Hybrid quantum systems involving solid-state spins and superconducting microwave cavities play a crucial role in quantum science and technology, but improving the spin-photon coupling at the single quantum level remains challenging in such systems. Here, we propose a simple technique to strongly couple a single solid-state spin to the microwave photons in a superconducting coplanar waveguide cavity via a magnetic microsphere. We show that strong coupling at the single spin level can be realized by virtual magnonic excitations of a nearby micromagnet. The spin-photon coupling strength can be enhanced up to typically 4 orders of magnitude larger than that without the use of the micromagnet. This work can find applications in quantum information processing with strongly coupled solid-state spin-photonic systems.
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