6 papers
Beating the Bad-Cavity Limit via Auxiliary-Emitter Linewidth Squeezing
Youke Xu, Zeyang Liao, Xue-hua Wang
Strong coupling in cavity QED is conventionally achieved at the expense of either high cavity quality factors or ultrasmall mode volumes, a trade-off that fundamentally constrains…
Theory of the Collective Many-body Subradiance in Waveguide Quantum Electrodynamics
Xin Wang, Junjun He, Zeyang Liao
We present an analytical theory for the most subradiant modes in a finite one-dimensional emitter array coupled to either an ideal or a nonideal waveguide. Using an effective non-H…
Super-Heisenberg-limited Sensing via Collective Subradiance in Waveguide Quantum Electrodynamics
Xin Wang, Zeyang Liao
We explore the quantum-metrological potential of subwavelength-spaced emitter arrays coupled to a one-dimensional nanophotonic waveguide. In this system, strong dipole--dipole inte…
Tunable ultrahigh reflection with broadband via collective atom-atom interaction in waveguide-QED system
Xin Wang, Junjun He, Zeyang Liao +1
We present a scheme for achieving broadband complete reflection by constructing photonic bandgap via collective atom-atom interaction in a one-dimensional (1D) waveguide quantum el…
Atomic-scale on-demand photon polarization manipulation with high-efficiency for integrated photonic chips
Yunning Lu, Zeyang Liao, Xue-hua Wang
In order to overcome the challenge of lacking polarization encoding in integrated quantum photonic circuits, we propose a scheme to realize arbitrary polarization manipulation of a…
Quantum search in many-body interacting system with long-range interaction
Fan Xing, Yan Wei, Zeyang Liao
Continuous-time quantum walks provide an alternative method for quantum search problems. Most of the earlier studies confirmed that quadratic speedup exists in some synthetic Hamil…