4 papers · 1 filter
Strong single-photon optomechanical coupling in a hybrid quantum system
Jiaojiao Chen, Zhuanxia Li, Xiao-Qing Luo +3
Engineering strong single-photon optomechanical couplings is crucial for optomechanical systems. Here, we propose a hybrid quantum system consisting of a nanobeam (phonons) coupled…
Entangling and squeezing atoms by weak measurement
Mingfeng Wang, Weizhi Qu, Han Bao +2
A weak measurement approach is proposed to entangle and squeeze atoms. We show that even for very small coupling strength between light and atoms, one can achieve large squeezing u…
Spin squeezing via one- and two-axis twisting induced by a single off-resonance stimulated Raman scattering in a cavity
Gang Liu, Ya-Ni Wang, Li-Fen Yan +3
Squeezed spin states have important applications in quantum metrology and sensing. It has been shown by Sørensen and Mølmer [Phys. Rev. A 66, 022314(2002)] that an effective one-ax…
Measurements with prediction and retrodiction on the collective spin of 10^{11} atoms beat the standard quantum limit
Han Bao, Junlei Duan, Xingda Lu +10
Quantum probes using uncorrelated particles give a limit on the measurement sensitivity referred to as the standard quantum limit (SQL). The SQL, however, can be overcome by ex…