量子位元
物理
量子隧道
光子
谐振器
库珀对
约瑟夫森效应
电荷(物理)
微波食品加热
超导隧道结
量子计算机
凝聚态物理
原子物理学
量子力学
光电子学
量子
皮约瑟夫森结
超导电性
作者
Sheng-li Ma,Xinke Li,Ya-long Ren,Ji-kun Xie,Fuli Li
标识
DOI:10.1103/physrevresearch.3.043020
摘要
We propose an experimentally feasible scheme for generating antibunched $N$-photon bundles by a dc voltage-biased Josephson junction in series with a superconducting microwave resonator and a charge qubit. Each resonant tunneling Cooper pair leads to the excitation of the charge qubit and resonator with $N$ photons simultaneously via the ac Josephson effect. Meanwhile, the charge qubit with strong anharmonicity is utilized to regulate the tunneling behavior of the Cooper pairs; that is, the presence of $N$ photons in the resonator prevents the next tunnel event. So the resonator contains only $N$ photons or none, and all other possibilities are greatly suppressed. Combined with the system's dissipation, the resonator can emit its energy in antibunched bundles of $N$ strongly correlated photons with high purity and an in situ tunable emission rate. Such a nonclassical source could be useful in applications in the field of quantum information science.
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