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(Sep. 12) Introduction to quantum metrology and the application of feedback Hamiltonian control

Last updated :2019-09-09

Topic: Introduction to quantum metrology and the application of feedback Hamiltonian control
Speaker: Prof. Shengshi Pang
Host:
Prof. Ze-Liang Xiang (Sun Yat-sen University)
Time: 15:00-16:30, Thursday, September 12, 2019
Venue: Room 300, Ten Alumni Hall, Guangzhou South Campus, SYSU

Abstract:
Quantum metrology is a rapid-developing quantum technology in recent years, which uses quantum correlation to enhance the sensitivity of quantum measurements. In this presentation, we will introduce the basic principle of quantum metrology, and discuss how to improve the precision of quantum measurements by Hamiltonian control. We show that by proper Hamiltonian control, the precision of traditional frequency measurement of a magnetic field can be significantly increased and break the classical limit. This Hamiltonian control is feedback-based, and can approach to be optimal by very few rounds of feedbacks. At the end of the talk, we outline current active research directions in the field of quantum metrology.

About the speaker:
Shengshi Pang, professor of School of Physics at Sun Yat-sen University. He received the PhD degree from University of Science and Technology of China in 2012, and did postdoc research at University of Southern California, University of Rochester and Fermilab from 2013 to 2019. His main research interest is quantum information and quantum metrology. Shengshi Pang has so far published 18 papers in Nature Communications, Physical Review Letters, Physical Review A, etc.