科学研究

Seminar 首页 - 科学研究 - 学术活动 - Seminar

【Seminar】Phase-space geometric Sagnac interferometer for rotation sensing

Speaker


Prof. Wang Xiaoguang(王晓光)

Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University                                                       

 

Host


Prof. Fu Libin(傅立斌)


Date&Time


2018-11-27   14:00~15:00 PM


Venue


C405 Conference Room, 4th Floor


Abstract 


Quantum information processing with geometric features of quantum states may provide promising noiseresilient schemes for quantum metrology. In this work, we theoretically explore phase-space geometric Sagnac interferometers with trapped atomic clocks for rotation sensing, which could be intrinsically robust to certain decoherence noises and reach high precision. With the wave guide provided by sweeping ring traps, we give criteria under which the well-known Sagnac phase is a pure or unconventional geometric phase with respect to the phase space. Furthermore, corresponding schemes for geometric Sagnac interferometers with designed sweeping angular velocity and interrogation time are presented, and the experimental feasibility is also discussed. Such geometric Sagnac interferometers are capable of saturating the ultimate precision limit given by the quantum Cramér-Rao bound.


About the Speaker


王晓光,1998年6月于中国科学院长春物理所获博士学位。现为浙江近代物理中心教授。主要研究领域包括量子信息与计算理论,量子光学,和凝聚态理论。共在国内外学术刊物上发表论文150篇。 在物理评论(包括Phys. Rev. Lett., Phys. Rev. A,B,E)上共发表论文50余篇,论文SCI引用5600余次。单篇论文SCI引用500余次。 2010国家杰出青年基金获得者.


All interested are welcome!