量子通信是量子物理与信息科学的交叉学科,在实现信息的无条件安全传送、量子信息的操控、传递等方面具有重要的应用。课题组主要开展量子通信方面的实验和理论研究,针对量子通信的新原理、新方法进行探索和研究,并由此发展量子通信的相关新技术,研制相关原理型器件,推进量子通信的发展和实用化。近期的研究方向:连续变量量子保密通信;腔量子光力;光场量子态工程和操控。


High-Gain and Narrow-Bandwidth Optical Amplifier via Optomechanical Four-Wave Mixing

Zongyang Li, Zhenqiang Ren, Yongmin Li, Yong-chun Liu, and Kunchi Peng.

  We present an ultrahigh gain, narrow bandwidth, and low noise optical amplifier via the radiation pressure induced by the four-wave mixing (FWM) effect based on a cavity optomechanical system in the....

Phys. Rev. Applied, 11, 064048 (2019).


Long-Distance Continuous-Variable Quantum Key Distribution with Entangled States

Ning Wang, Shanna Du, Wenyuan Liu, Xuyang Wang, Yongmin Li, and Kunchi Peng.

  We experimentally demonstrate long-distance continuous-variable quantum key distribution over a 50- km standard optical fiber based on continuous-variable Einstein-Podolsky-Rosen entangled states....

Phys. Rev. Applied,10,064028 (2018).


Multimode four-wave mixing in an unresolved sideband optomechanical system

Zongyang Li, Xiang You, Yongmin Li, Yong-Chun Liu, and Kuichi Peng.

  We have studied multimode four-wavemixing (FWM)in an unresolved sideband cavity optomechanical system. The radiation pressure coupling between the cavity fields and multiple mechanical modes results in the formation...

Phys. Rev. A,97,033806 (2018).


High-Visibility, High-Strength, Rapid-Response, In-Fiber Optofluidic Sensor

Qiang Zhang, Zongyang Li, Xinzhang Tian, Pengli Hao, Xuyang Wang, and Yongmin Li.

  Optofluidic sensors are promising tools in biological and chemical analysis. A challenge for optofluidic sensors in most practical applications is to have simultaneously high visibility, high mechanical strength, and rapid response for high-resolution, stable, and fast measurement....

Journal of Lightwave Technology, 36(14) (2018).


Strong quantum squeezing of mechanical resonator via parametric amplification and coherent feedback

Xiang You, Zongyang Li, and Yongmin Li.

  A scheme to achieve strong quantum squeezing of a mechanical resonator in a membrane-in-the-middle optomechanical system is developed. To this end, simultaneous linear and nonlinear coupling between the mechanical resonator and the cavity modes is applied....

Phys. Rev. A, 96, 063811 (2017).


Imperfect state preparation in continuous-variable quantum key distribution

Wenyuan Liu, Xuyang Wang, Ning Wang, Shanna Du, and Yongmin Li.

  In continuous-variable quantum key distribution, the loss and excess noise of the quantum channel are key parameters that determine the secure key rate...

Phys. Rev. A, 96, 042312 (2017).


Experimental study on all-fiber-based unidimensional continuous-variable quantum key distribution

Xuyang Wang, Wenyuan Liu, Pu Wang, and Yongmin Li.

  We experimentally demonstrated an all-fiber-based unidimensional continuous-variable quantum key distribution (CV QKD) protocol and analyzed its security under collective attack in realistic conditions...

Phys. Rev. A, 95, 062330 (2017).


 

 

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