@article{3835e62be6664d989ea3eb9540e59730,
title = "Long-lived entanglement of two multilevel atoms in a waveguide",
abstract = "We study the presence of nontrivial bound states of two multilevel quantum emitters and the photons propagating in a linear waveguide, when the emitters can be modeled as harmonic oscillators. We characterize the conditions for the existence of such states and determine their general properties, focusing in particular on the entanglement between the two emitters, that increases with the number of excitations. We discuss the relevance of our results for entanglement preservation and generation by spontaneous relaxation processes. We finally introduce a perturbative method for determining the existence of long-lived states, for general level spacings and couplings.",
keywords = "Bound states, Entanglement generation, Waveguide QED",
author = "Paolo Facchi and Saverio Pascazio and Pepe, {Francesco V.} and Kazuya Yuasa",
note = "Funding Information: We thank F Ciccarello, M S Kim, D Pomarico and T Tufarelli for early discussions. PF and SP are partly supported by INFN through the project {\textquoteleft}QUANTUM{\textquoteright}. FVP is supported by INFN through the project {\textquoteleft}PICS{\textquoteright}. PF is partially supported by the Italian National Group of Mathematical Physics (GNFM-INdAM). This work is supported by the Top Global University Project from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. KY is supported by the Grant-in-Aid for Scientific Research (C)(No. 26400406) from the Japan Society for the Promotion of Science (JSPS) and by the Waseda University Grant for Special Research Projects (No. 2016K-215 and No. 2017K-236). Publisher Copyright: {\textcopyright} 2018 The Author(s). Published by IOP Publishing Ltd.",
year = "2018",
month = mar,
doi = "10.1088/2399-6528/aaae9f",
language = "English",
volume = "2",
journal = "Journal of Physics Communications",
issn = "2399-6528",
publisher = "Institute of Physics Publishing",
number = "3",
}