Exponentially Enhanced Light-Matter Interaction, Cooperativities, and Steady-State Entanglement Using Parametric Amplification

被引:210
作者
Qin, Wei [1 ,2 ]
Miranowicz, Adam [2 ,3 ]
Li, Peng-Bo [2 ,4 ]
Lu, Xin-You [5 ]
You, J. Q. [1 ,6 ]
Nori, Franco [2 ,7 ]
机构
[1] Beijing Computat Sci Res Ctr, Quantum Phys & Quantum Informat Div, Beijing 100193, Peoples R China
[2] RIKEN, CEMS, Wako, Saitama 3510198, Japan
[3] Adam Mickiewicz Univ, Fac Phys, PL-61614 Poznan, Poland
[4] Xi An Jiao Tong Univ, Dept Appl Phys, Shaanxi Prov Key Lab Quantum Informat & Quantum O, Xian 710049, Shaanxi, Peoples R China
[5] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei, Peoples R China
[6] Zhejiang Univ, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China
[7] Univ Michigan, Phys Dept, Ann Arbor, MI 48109 USA
基金
中国博士后科学基金; 日本学术振兴会;
关键词
OPEN QUANTUM-SYSTEMS; SINGLE TRAPPED ATOM; SUPERCONDUCTING CIRCUITS; !text type='PYTHON']PYTHON[!/text] FRAMEWORK; SQUEEZED VACUUM; CAVITY; INFORMATION; PHOTON; DYNAMICS; QUTIP;
D O I
10.1103/PhysRevLett.120.093601
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We propose an experimentally feasible method for enhancing the atom-field coupling as well as the ratio between this coupling and dissipation (i.e., cooperativity) in an optical cavity. It exploits optical parametric amplification to exponentially enhance the atom-cavity interaction and, hence, the cooperativity of the system, with the squeezing-induced noise being completely eliminated. Consequently, the atom-cavity system can be driven from the weak-coupling regime to the strong-coupling regime for modest squeezing parameters, and even can achieve an effective cooperativity much larger than 100. Based on this, we further demonstrate the generation of steady-state nearly maximal quantum entanglement. The resulting entanglement infidelity (which quantifies the deviation of the actual state from a maximally entangled state) is exponentially smaller than the lower bound on the infidelities obtained in other dissipative entanglement preparations without applying squeezing. In principle, we can make an arbitrarily small infidelity. Our generic method for enhancing atom-cavity interaction and cooperativities can be implemented in a wide range of physical systems, and it can provide diverse applications for quantum information processing.
引用
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页数:7
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