108564 20211125124512.0 doi 10.1021/acsphotonics.0c01208 sideral 122324 ART-2020-122324 eng Downing, C.A. (orcid)0000-0002-0058-9746 Chiral Current Circulation and PT Symmetry in a Trimer of Oscillators 2020 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. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/DGA/Q-MAD info:eu-repo/grantAgreement/ES/MINECO/MAT2017-88358–C3-I-R info:eu-repo/grantAgreement/EUR/QUANTERA/SUMO info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 7.529 2020 MATERIALS SCIENCE, MULTIDISCIPLINARY 64 / 333 = 0.192 2020 Q1 T1 OPTICS 10 / 99 = 0.101 2020 Q1 T1 PHYSICS, APPLIED 24 / 160 = 0.15 2020 Q1 T1 PHYSICS, CONDENSED MATTER 13 / 69 = 0.188 2020 Q1 T1 NANOSCIENCE & NANOTECHNOLOGY 31 / 106 = 0.292 2020 Q2 T1 2.734 2020 Atomic and Molecular Physics, and Optics 2020 Q1 Electronic, Optical and Magnetic Materials 2020 Q1 Electrical and Electronic Engineering 2020 Q1 Biotechnology 2020 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Zueco, D. Universidad de Zaragoza (orcid)0000-0003-4478-1948 Martín-Moreno, L. Universidad de Zaragoza (orcid)0000-0001-9273-8165 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 7, 12 (2020), 3401-3414 ACS photonics ACS photonics 2330-4022 10454429 http://zaguan.unizar.es/record/108564/files/texto_completo.pdf Postprint 3439994 http://zaguan.unizar.es/record/108564/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:108564 articulos driver 2021-11-25-11:09:23 ARTICLE