6533b86efe1ef96bd12cbe2b
RESEARCH PRODUCT
Non-Markovianity of a quantum emitter in front of a mirror
Tommaso TufarelliFrancesco CiccarelloMyungshik Kimsubject
PhysicsQuantum PhysicsQuantum decoherencebusiness.industryFOS: Physical sciencesDelay differential equationParameter spaceAtomic and Molecular Physics and OpticsOptical pathQuantum mechanicsBound statePhotonicsQuantum informationbusinessQuantum Physics (quant-ph)Quantumquantum non-Markovianity open quantum systems waveguide QDdescription
We consider a quantum emitter ("atom") radiating in a one-dimensional (1D) photonic waveguide in the presence of a single mirror, resulting in a delay differential equation for the atomic amplitude. We carry out a systematic analysis of the non-Markovian (NM) character of the atomic dynamics in terms of refined, recently developed notions of quantum non-Markovianity such as indivisibility and information back-flow. NM effects are quantified as a function of the round-trip time and phase shift associated with the atom-mirror optical path. We find, in particular, that unless an atom-photon bound state is formed a finite time delay is always required in order for NM effects to be exhibited. This identifies a finite threshold in the parameter space, which separates the Markovian and non-Markovian regimes.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-01-01 |