107 citations · 1.6k across the 84 of their papers we have counts for
22 papers · 2 filters
Is a rubidium cell with long decay time always useful for generating a non-classical photon pair?
Qun-Feng Chen, Xiao-Song Lu, Bao-Sen Shi +1
We experimentally find an interesting and unexpected thing: a rubidium cell with long decay time can not be used to generate a non-classical correlated photon pair via the D2 trans…
Simple scheme for expanding a polarization-entangled W state by adding one photon
Yan-Xiao Gong, Xu-Bo Zou, Yun-Feng Huang +1
We propose a simple scheme for expanding a polarization-entangled W state. By mixing a single photon and one of the photons in an n-photon W state at a polarization-dependent beam…
Experimental Measurement of Lower and Upper Bounds of Concurrence for Mixed Quantum States
Xiao-Ling Niu, Yan-Xiao Gong, Jian Li +5
We experimentally measure the lower and upper bounds of concurrence for a set of two-qubit mixed quantum states using photonic systems. The measured concurrence bounds are in agree…
Dependence of the decoherence of polarization states in phase-damping channels on the frequency spectrum envelope of photons
Yan-Xiao Gong, Yong-Sheng Zhang, Yu-Li Dong +3
We consider the decoherence of photons suffering in phase-damping channels. By exploring the evolutions of single-photon polarization states and two-photon polarization-entangled s…
Control of light speed: From slow light to superluminal light
Qun-Feng Chen, Yong-Sheng Zhang, Bao-Sen Shi +1
A scheme for controlling light speed from slower-than-c to faster-than-c in an atomic system is presented in this paper. The scheme is based on far detuning Raman effect. Two far d…
Entanglement of the orbital angular momentum states of the photons generated in a hot atomic ensemble
Qun-Feng Chen, Bao-Sen Shi, Yong-Sheng Zhang +1
Quantum protocols will be more efficient with high-dimensional entangled states. Photons carrying orbital angular momenta can be used to create a high-dimensional entangled state.…