Chiral Current Circulation and PT Symmetry in a Trimer of Oscillators

Downing, C.A. ; Zueco, D. (Universidad de Zaragoza) ; Martín-Moreno, L. (Universidad de Zaragoza)

Resumen: We present a simple quantum theory of a bosonic trimer in a triangular configuration, subject to gain and loss in an open quantum systems approach. Importantly, the coupling constants between each oscillator are augmented by complex arguments, which give rise to various asymmetries. In particular, one may tune the complex phases to induce chiral currents, including the special case of completely unidirectional (or one-way) circulation when certain conditions are met regarding the coherent and incoherent couplings. When our general theory is recast into a specific non-Hermitian Hamiltonian, we find interesting features in the trimer population dynamics close to the exceptional points between phases of broken and unbroken PT symmetry. Our theoretical work provides perspectives for the experimental realization of chiral transport at the nanoscale in a variety of accessible nanophotonic and nanoplasmonic systems and paves the way for the potential actualization of nonreciprocal devices.

Idioma: Inglés

DOI: 10.1021/acsphotonics.0c01208

Año: 2020

Publicado en: ACS photonics 7, 12 (2020), 3401-3414
ISSN: 2330-4022

Factor impacto JCR: 7.529 (2020)

Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 64 / 333 = 0.192 (2020) - Q1 - T1
Categ. JCR: OPTICS rank: 10 / 99 = 0.101 (2020) - Q1 - T1
Categ. JCR: PHYSICS, APPLIED rank: 24 / 160 = 0.15 (2020) - Q1 - T1
Categ. JCR: PHYSICS, CONDENSED MATTER rank: 13 / 69 = 0.188 (2020) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 31 / 106 = 0.292 (2020) - Q2 - T1

Factor impacto SCIMAGO: 2.734 - Atomic and Molecular Physics, and Optics (Q1) - Electronic, Optical and Magnetic Materials (Q1) - Electrical and Electronic Engineering (Q1) - Biotechnology (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/Q-MAD
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2017-88358–C3-I-R
Financiación: info:eu-repo/grantAgreement/EUR/QUANTERA/SUMO

Tipo y forma: Article (PostPrint)

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