Strongly Confined Atomic Excitation Localization in a Weakly-Driven Atom-Waveguide Interface

Abstract

An atomic array coupled to a photonic crystal waveguide forms a strongly coupled quantum interface, exhibiting various intriguing collective features of quantum dynamics. Here we consider a homogeneous atomic array and theoretically investigate its steady-state distribution when the incident fields drive the atoms from both sides at asymmetric angles. This effectively creates an interface shared by two zones of atoms under different driving angles. This setup introduces a competition between photon-mediated dipole-dipole interactions and the directionality of coupling, while differences of the travelling phases from the incident angles further influence the overall steady-state behavior. Under this asymmetric driving scheme, the presence of strongly confined localization can be identified, where localization can occur either at the interface or at one of edges. Additionally, we examine the size effect on the atomic localization, deriving an empirical formula to predict parameter regimes that favor interfaced localization. We also consider a defect-driving scheme, where a third zone is created by undriven atoms under symmetric travelling phases. This results in strongly confined single-site excitation localization, which can be explained through analytical solutions under the reciprocal coupling. Finally, we propose several methods for precise control of multiple single-site localizations under the defect-driving scheme. Our results provide insights into driven-dissipative quantum systems with nonreciprocal couplings and pave the way for quantum simulation of exotic many-body states relevant to quantum information applications.

8 figures

References in corpus (49)

• Decoherence Free Subspaces for Quantum Computation
• Chiral Quantum Optics
• Transverse and longitudinal angular momenta of light
• Single-Photon Switching and Entanglement of Solid-State Qubits in an Integrated Nanophotonic System
• Optical interface created by laser-cooled atoms trapped in the evanescent field surrounding an optical nanofiber
• Deterministic photon-emitter coupling in chiral photonic circuits
• Near-unity coupling efficiency of a quantum emitter to a photonic-crystal waveguide
• Superradiance for atoms trapped along a photonic crystal waveguide
• Chiral groundstate currents of interacting photons in a synthetic magnetic field
• Quantum Optics of Chiral Spin Networks
• Quantum Nonlinear Optics with a Germanium-Vacancy Color Center in a Nanoscale Diamond Waveguide
• Super-radiance reveals infinite-range dipole interactions through a nanofiber
• Waveguide-coupled single collective excitation of atomic arrays
• Quantum Spin Dimers from Chiral Dissipation in Cold-Atom Chains
• Quantum electrodynamics in a topological waveguide
• Theory of Subradiant States of a One-Dimensional Two-Level Atom Chain
• Mesoscopic Entanglement Induced by Spontaneous Emission in Solid-State Quantum Optics
• Cavity QED on a nanofiber using a composite photonic crystal cavity
• Subradiant states of quantum bits coupled to a one-dimensional waveguide
• Interfacing a quantum dot spin with a photonic circuit
• Generalized Inverse Participation Ratio as a Possible Measure of Localization for Interacting Systems
• Storage of fiber-guided light in a nanofiber-trapped ensemble of cold atoms
• Dynamics of many-body photon bound states in chiral waveguide QED
• Entanglement transport and a nanophotonic interface for atoms in optical tweezers
• Strongly correlated photon transport in waveguide QED with weakly coupled emitters
• Critical open-system dynamics in a one-dimensional optical lattice clock
• Inelastic scattering of photon pairs in qubit arrays with subradiant states
• Synthesis of antisymmetric spin exchange interaction and entanglement generation with chiral spin states in a superconducting circuit
• Signatures of bath-induced quantum avalanches in a many-body--localized system
• Atomic-waveguide quantum electrodynamics
• Subradiance-protected excitation transport
• Trapping single atoms on a nanophotonic circuit with configurable tweezer lattices
• Many-body localization in waveguide QED
• Collective radiative dynamics of an ensemble of cold atoms coupled to an optical waveguide
• Many-body superradiance and dynamical mirror symmetry breaking in waveguide QED
• Experimental reconstruction of the few-photon nonlinear scattering matrix from a single quantum dot in a nanophotonic waveguide
• Bound and Subradiant Multi-Atom Excitations in an Atomic Array with Nonreciprocal Couplings
• Asymmetric coupling between two quantum emitters
• Subradiance dynamics in a singly-excited chiral-coupled atomic chain
• Resonance energy transfer between two atoms in a conducting cylindrical waveguide
• Self-Ordering of Individual Photons in Waveguide QED and Rydberg-Atom Arrays
• Steady-state Phase Diagram of a Weakly Driven Chiral-coupled Atomic Chain
• Disorder-assisted excitation localization in chirally coupled quantum emitters
• Quantum correlations of localized atomic excitations in a disordered atomic chain
• Strongly confined atomic localization by Rydberg coherent population trapping
• Incomplete spontaneous decay in a waveguide caused by polarization selection
• Driven anti-Bragg subradiant states in waveguide quantum electrodynamics
• Atomic excitation delocalization at the clean to disordered interface in a chirally-coupled atomic array
• Atomic excitation trapping in dissimilar chirally-coupled atomic arrays