112 citations · 761 across the 26 of their papers we have counts for
26 papers
Selective high-order topological states and tunable chiral emission in atomic metasurfaces
Yi-Xin Wang, Yan Zhang, Lei Du +2
Atomic metasurfaces (AMs) provide a powerful nanophotonic platform for integrating topological effects into quantum many-body systems. In this Letter, we investigate the quantum op…
Single-photon manipulations based on optically-controlled chiral couplings in waveguide structures of Rydberg giant atoms
Yao-Tong Chen, Lei Du, Zhihai Wang +3
Two interacting Rydberg atoms coupled to a waveguide realize a giant-atom platform that exhibits the controllable (phase-dependent) chirality where the direction of nonreciprocal p…
Chiral phase modulation and tunable broadband perfect absorber using the coherent cold atomic ensemble
Yi-Xin Wang, Yan Zhang, Lei Du +1
We investigate the two-channel nonreciprocal scattering of a coherent atomic ensemble under the linear spatial Kramers-Kronig modulation, which has potential applications in chiral…
Giant Emitters in a Structured Bath with Non-Hermitian Skin Effect
Lei Du, Lingzhen Guo, Yan Zhang +1
Giant emitters derive their name from nonlocal field-emitter interactions and feature diverse self-interference effects. Most of the existing works on giant emitters have considere…
Amplifying Frequency Up-Converted Infrared Signals with a Molecular Optomechanical Cavity
Fen Zou, Lei Du, Yong Li +1
Frequency up-conversion, enabled by molecular optomechanical coupling, has recently emerged as a promising approach for converting infrared signals into the visible range through q…
Giant-Atom Effects on Population and Entanglement Dynamics of Rydberg Atoms
Yao-Tong Chen, Lei Du, Yan Zhang +4
Giant atoms are attracting interest as an emerging paradigm in the quantum optics of engineered waveguides. Here we propose to realize a synthetic giant atom working in the optical…
Experimental Implementation of Short-Path Non-adiabatic Geometric Gates in a Superconducting Circuit
Xin-Xin Yang, Liang-Liang Guo, Hai-Feng Zhang +8
The non-adiabatic geometric quantum computation (NGQC) has attracted a lot of attention for noise-resilient quantum control. However, previous implementations of NGQC require long…
Decay dynamics of a giant atom in a structured bath with broken time-reversal symmetry
Lei Du, Yao-Tong Chen, Yan Zhang +2
We study in this paper the decay dynamics of a two-level giant atom, which is coupled to a quasi-one-dimensional sawtooth lattice exposed to uniform synthetic magnetic fluxes. In t…
Enhanced sensing of optomechanically induced nonlinearity by linewidth suppression and optical bistability in cavity-waveguide systems
Chun-Wang Liu, Ye Liu, Lei Du +3
We study enhanced sensing of optomechanically induced nonlinearity (OMIN) in a cavity-waveguide coupled system. The Hamiltonian of the system is anti-PT symmetric with the two invo…
Complex decoherence-free interactions between giant atoms
Lei Du, Lingzhen Guo, Yong Li
Giant atoms provide a promising platform for engineering decoherence-free interactions which is a major task in modern quantum technologies. Here we study systematically how to imp…
A giant atom with modulated transition frequency
Lei Du, Yan Zhang, Yong Li
Giant atoms are known for the frequency-dependent spontaneous emission and associated interference effects. In this paper, we study the spontaneous emission dynamics of a two-level…
Nonreciprocal and chiral single-photon scattering for giant atoms
Yao-Tong Chen, Lei Du, Lingzhen Guo +4
Quantum optics with giant atoms has provided a new paradigm to study photon scatterings. In this work, we investigate the nontrivial single-photon scattering properties of giant at…
Giant atoms with time-dependent couplings
Lei Du, Yao-Tong Chen, Yan Zhang +1
We study the decay dynamics of a two-level giant atom that is coupled to a waveguide with time-dependent coupling strengths. In the non-Markovian regime where the retardation effec…
Quantum transport in nonlinear Rudner-Levitov models
Lei Du, Jin-Hui Wu, M. Artoni +1
Quantum transport in a class of nonlinear extensions of the Rudner-Levitov model is numerically studied in this paper. We show that the quantization of the mean displacement, which…
Giant Atoms in a Synthetic Frequency Dimension
Lei Du, Yan Zhang, Jin-Hui Wu +2
Giant atoms that interact with real-space waveguides at multiple spatial points have attracted extensive attention due to their unique interference effects. Here we propose a feasi…
Nonreciprocal frequency conversion with chiral -type atoms
Lei Du, Yao-Tong Chen, Yong Li
In this paper, we begin with a model of a -type atom whose both transitions are chirally coupled to a waveguide and then extend the model to its giant-atom version. We investiga…
Single-photon frequency conversion via a giant -type atom
Lei Du, Yong Li
We study single-photon scattering via a giant -type atom, where both atomic transitions are coupled with the modes of a single waveguide at two separated points. The giant-atom…
Single-photon nonreciprocal excitation transfer with non-Markovian retarded effects
Lei Du, Mao-Rui Cai, Jin-Hui Wu +2
We study at the single-photon level the nonreciprocal excitation transfer between emitters coupled with a common waveguide. Non-Markovian retarded effects are taken into account du…
Perfect Transfer of enhanced entanglement and asymmetric steering in a cavity magnomechanical system
Yao-Tong Chen, Lei Du, Yan Zhang +1
We propose a hybrid cavity magnomechanical system to realize and transfer the bipartite entanglements and Einstein-Podolsky-Rosen (EPR) steerings between magnons, photons, and phon…
Controllable optical response and tunable sensing based on self interference in waveguide QED systems
Lei Du, Zhihai Wang, Yong Li
We study the self interference effect of a resonator coupled with a bent waveguide at two separated ports. Such interference effects are shown to be similar for the cases of standi…
Nonreciprocal quantum interference and coherent photon routing in a three-port optomechanical system
Lei Du, Yao-Tong Chen, Jin-Hui Wu +1
We study the quantum interference between different weak signals in a three-port optomechanical system, which is achieved by coupling three cavity modes to the same mechanical mode…
Phase controlled single-photon nonreciprocal transmission in a one-dimensional waveguide
Zhihai Wang, Lei Du, Yong Li +1
We study the controllable single-photon scattering via a one-dimensional waveguide which is coupled to a two-level emitter and a single-mode cavity simultaneously. The emitter and…
Dynamical evolution of an effective two-level system with PT symmetry
Lei Du, Zhihao Xu, Chuanhao Yin +1
We investigate the dynamics of parity- and time-reversal (PT ) symmetric two-energy-level atoms in the presence of two optical and a radio-frequency (rf) fields. The strength and r…
Dynamical evolutions in non-Hermitian triple-well system with complex potential
Liping Guo, Lei Du, Chuanhao Yin +2
We investigate the dynamical properties for non-Hermitian triple-well system with a loss in the middle well. When chemical potentials in two end wells are uniform and nonlinear int…