Dynamical signatures of bound states in waveguide QED

Sánchez-Burillo, E. ; Zueco, D. (Universidad de Zaragoza) ; Martín-Moreno, L. (Universidad de Zaragoza) ; García-Ripoll, J.J.

Resumen: We study the spontaneous decay of an impurity coupled to a linear array of bosonic cavities forming a single-band photonic waveguide. The average frequency of the emitted photon is different from the frequency for single-photon resonant scattering, which perfectly matches the bare frequency of the excited state of the impurity. We study how the energy of the excited state of the impurity influences the spatial profile of the emitted photon. The farther the energy is from the middle of the photonic band, the farther the wave packet is from the causal limit. In particular, if the energy lies in the middle of the band, the wave packet is localized around the causal limit. Besides, the occupation of the excited state of the impurity presents a rich dynamics: it shows an exponential decay up to intermediate times, this is followed by a power-law tail in the long-time regime, and it finally reaches an oscillatory stationary regime. Finally, we show that this phenomenology is robust under the presence of losses, both in the impurity and in the cavities.

Idioma: Inglés

DOI: 10.1103/PhysRevA.96.023831

Año: 2017

Publicado en: Physical Review A 96, 2 (2017), 023831 [10 pp]
ISSN: 2469-9926

Factor impacto JCR: 2.909 (2017)

Categ. JCR: OPTICS rank: 23 / 94 = 0.245 (2017) - Q1 - T1
Categ. JCR: PHYSICS, ATOMIC, MOLECULAR & CHEMICAL rank: 12 / 36 = 0.333 (2017) - Q2 - T2

Financiación: info:eu-repo/grantAgreement/ES/DGA/FENOL-GROUP
Financiación: info:eu-repo/grantAgreement/EC/FP7/258191/EU/Participative Research labOratory for Multimedia and Multilingual Information Systems Evaluation/PROMISE
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2014-55867-P
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2015-70856-P
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2014-53432-C5-1-R

Tipo y forma: Article (Published version)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)