Dazhi Xu

Title: Associate Professor
Tel: Zhongguancun Network Center 407
Department: Theoretical Physics
E-mail: dzxu@bit.edu.cn
Mailing Address:

His research interests include measurement problems and coherent control of quantum systems, quantum heat engine and quantum thermodynamics, finite time thermodynamics, quantum effects in photosynthesis systems, etc.

2008-09 to 2014-01, Institute of Theoretical Physics, Chinese Academy of Sciences, PhD
2004-09 to 2008-07, University of Science and Technology of China, B.S.

2016-09-present, Beijing Institute of Technology, Assistant Professor
2015-10 to 2016-07, Postdoctoral Fellow, Singapore-MIT Joint Science and Technology Research Center
2015-03-10, Postdoctoral Fellow, Massachusetts Institute of Technology
July 2014- March 2015, Nanyang Technological University, Postdoctoral Fellow

Representative research Achievements:
(1) The most rigorous analytical expression of the upper and lower bound of the efficiency of a low dissipation heat engine with limited output power is given.
(2) The problem of power and efficiency of three-level quantum heat engine under strong coupling of system and environment is solved.
(3) The kinetic description of the quantum Zeno effect is given, and the critical time effect is predicted theoretically and verified experimentally.
Research Project:
1. Hosted the National Natural Science Foundation of China Youth Project, 2018.01-2020.12
2. Host Project of National Natural Science Foundation of China, 2021.01-2024.12
Main Papers:
1.Fang Zhao, Qing Zhao and Dazhi Xu,* Efficient measurement of the time-dependent cavity field through compressed sensing. Phys. Rev A, 106, 012602 (2022).
2.DanWang and Dazhi Xu,* Nonadiabatic evolution and thermodynamics of a time-dependent open quantum system. Phys. Rev A, 104, 032201 (2021).
3.Guohui Dong, Dazhi Xu,* and Peng Zhang,* Magnetically Induced Optical Transparency With Ultra-Narrow Spectrum. Phys. Rev A, 102, 033717 (2020).
4.Shuai Liu, Xu-Ri Yao,* Xue-Feng Liu, Da-Zhi Xu,* Xing-Da Wang, Bing Liu, Chao Wang, Guang-Jie Zhai, and Qing Zhao, Pile-up effect in an infrared single-pixel compressive LiDAR system. Opt. Express, 27(16), 22138 (2019).
5.JianyeWei, Fang Zhao, Jingyu Liu, Qing Zhao, Ning Wu, and Dazhi Xu,* Enhanced exciton transport in an optical cavity field with spatially varying profile. Phys. Rev E 100, 012125 (2019).
6.ChenWang,* Dazhi Xu,* Huan Liu, and Xianlong Gao, Thermal rectification and heat amplification in a nonequilibrium V-type three-level system. Phys. Rev. E 99, 042102 (2019).
7.Yu-Han Ma, Dazhi Xu,* Hui Dong,* and Chang-Pu Sun,* Universal constraint for efficiency and power of a low-dissipation heat engine. Phys. Rev. E 98, 042112 (2018).
8.Yu-Han Ma, Dazhi Xu,* Hui Dong,* Optimal operating protocol to achieve efficiency at maximum power of heat engines. Phys. Rev. E 98, 022133 (2018).
9.Dazhi Xu, Chen Wang, Yang Zhao and Jianshu Cao*, Polaron effects on the performance of light-harvesting systems: A quantum heat engine perspective. New J. Phys. 18, 023003 (2016).
10.Dazhi Xu and Jianshu Cao*, Non-canonical distribution and non-equilibrium transport beyond weak system-bath coupling regime: A polaron transformation approach. Front. Phys. 11(4), 110308 (2016).
11.D. Z. Xu, Sheng-Wen Li, X. F. Liu and C. P. Sun*, Non-canonical statistics of finite quantum system. Phys. Rev. E 90, 062125 (2014).
12.D. Z. Xu, Yong Li, C. P. Sun and Peng Zhang*, Collective effects of multiscattering on the coherent propagation of photons in a two-dimensional network. Phys. Rev. A 88, 013832 (2013).
13.Wenqiang Zheng#, D. Z. Xu#, Xinhua Peng, Xianyi Zhou, Jiangfeng Du and C. P. Sun*, Experimental quantum Zeno effect in NMR with entanglement-based measurement. Phys. Rev. A 87, 032112 (2013).
14.D. Z. Xu, Q. Ai and C. P. Sun*, Dispersive-coupling-based quantum Zeno effect in a cavity-QED system. Phys. Rev. A 83, 022107 (2011).