6533b7d0fe1ef96bd125b7ad
RESEARCH PRODUCT
Vacancy-like Dressed States in Topological Waveguide QED
Luca LeonforteAngelo CarolloFrancesco CiccarelloFrancesco Ciccarellosubject
---Condensed Matter::Quantum GasesPhysicsQuantum PhysicsWaveguide (electromagnetism)PhotonSettore FIS/02 - Fisica Teorica Modelli E Metodi MatematiciContinuum (topology)business.industryFOS: Physical sciencesPhysics::OpticsGeneral Physics and Astronomy01 natural sciencesCavity QED Photonic bound states topological latticeVacancy defectQuantum mechanics0103 physical sciencesAtomBound statePhysics::Atomic PhysicsPhotonicsQuantum Physics (quant-ph)010306 general physicsbusinessEigenvalues and eigenvectorsdescription
We identify a class of dressed atom-photon states formingat the same energy of the atom at any coupling strength. As a hallmark, their photonic component is an eigenstate of the bare photonic bath with a vacancy in place of the atom. The picture accommodates waveguide-QED phenomena where atoms behave as perfect mirrors, connecting in particular dressed bound states (BS) in the continuum or BIC with geometrically-confined photonic modes. When applied to photonic lattices, the framework provides a general criterion to predict dressed BS in lattices with topological properties by putting them in one-to-one correspondence with photonic BS. New classes of dressed BS are thus predicted in the photonic Creutz-ladder and Haldane models. In the latter case, states with non-zero local photon flux occur, where an atom is dressed by a photon orbiting around it.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-07-06 |