000108564 001__ 108564 000108564 005__ 20211125124512.0 000108564 0247_ $$2doi$$a10.1021/acsphotonics.0c01208 000108564 0248_ $$2sideral$$a122324 000108564 037__ $$aART-2020-122324 000108564 041__ $$aeng 000108564 100__ $$0(orcid)0000-0002-0058-9746$$aDowning, C.A. 000108564 245__ $$aChiral Current Circulation and PT Symmetry in a Trimer of Oscillators 000108564 260__ $$c2020 000108564 5060_ $$aAccess copy available to the general public$$fUnrestricted 000108564 5203_ $$aWe present a simple quantum theory of a bosonic trimer in a triangular configuration, subject to gain and loss in an open quantum systems approach. Importantly, the coupling constants between each oscillator are augmented by complex arguments, which give rise to various asymmetries. In particular, one may tune the complex phases to induce chiral currents, including the special case of completely unidirectional (or one-way) circulation when certain conditions are met regarding the coherent and incoherent couplings. When our general theory is recast into a specific non-Hermitian Hamiltonian, we find interesting features in the trimer population dynamics close to the exceptional points between phases of broken and unbroken PT symmetry. Our theoretical work provides perspectives for the experimental realization of chiral transport at the nanoscale in a variety of accessible nanophotonic and nanoplasmonic systems and paves the way for the potential actualization of nonreciprocal devices. 000108564 536__ $$9info:eu-repo/grantAgreement/ES/DGA/Q-MAD$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2017-88358–C3-I-R$$9info:eu-repo/grantAgreement/EUR/QUANTERA/SUMO 000108564 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/ 000108564 590__ $$a7.529$$b2020 000108564 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b64 / 333 = 0.192$$c2020$$dQ1$$eT1 000108564 591__ $$aOPTICS$$b10 / 99 = 0.101$$c2020$$dQ1$$eT1 000108564 591__ $$aPHYSICS, APPLIED$$b24 / 160 = 0.15$$c2020$$dQ1$$eT1 000108564 591__ $$aPHYSICS, CONDENSED MATTER$$b13 / 69 = 0.188$$c2020$$dQ1$$eT1 000108564 591__ $$aNANOSCIENCE & NANOTECHNOLOGY$$b31 / 106 = 0.292$$c2020$$dQ2$$eT1 000108564 592__ $$a2.734$$b2020 000108564 593__ $$aAtomic and Molecular Physics, and Optics$$c2020$$dQ1 000108564 593__ $$aElectronic, Optical and Magnetic Materials$$c2020$$dQ1 000108564 593__ $$aElectrical and Electronic Engineering$$c2020$$dQ1 000108564 593__ $$aBiotechnology$$c2020$$dQ1 000108564 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion 000108564 700__ $$0(orcid)0000-0003-4478-1948$$aZueco, D.$$uUniversidad de Zaragoza 000108564 700__ $$0(orcid)0000-0001-9273-8165$$aMartín-Moreno, L.$$uUniversidad de Zaragoza 000108564 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada 000108564 773__ $$g7, 12 (2020), 3401-3414$$pACS photonics$$tACS photonics$$x2330-4022 000108564 8564_ $$s10454429$$uhttps://zaguan.unizar.es/record/108564/files/texto_completo.pdf$$yPostprint 000108564 8564_ $$s3439994$$uhttps://zaguan.unizar.es/record/108564/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint 000108564 909CO $$ooai:zaguan.unizar.es:108564$$particulos$$pdriver 000108564 951__ $$a2021-11-25-11:09:23 000108564 980__ $$aARTICLE