3 papers
quant-ph2022
Superconducting giant atom waveguide QED: Quantum Zeno and Anti-Zeno effects in ultrastrong coupling regime
Xiaojun Zhang, Weijun Cheng, Zhirui Gong +2
The giant atom system is a new paradigm in quantum optics, in which the traditional dipole approximation is not available. In this paper, we construct an artificial giant atom mode…
quant-ph2019
Quantum metrology enhanced by coherence-induced-driving in a cavity QED setup
Weijun Cheng, S. C. Hou, Zhihai Wang +1
We propose a quantum metrology scheme in a cavity QED setup to achieve the Heisenberg limit. In our scheme, a series of identical two-level atoms randomly pass through and interact…
quant-ph2018
Quantum beats and metrology in a rapidly rotating Nitrogen-Vacancy center
Weijun Cheng, Tian Tian, Zhihai Wang
In this paper, we study the dynamical behavior and quantum metrology in a rotating Nitrogen-Vacancy(NV) center system which is subject to an external magnetic field. Based on the r…