000110775 001__ 110775 000110775 005__ 20230519145455.0 000110775 0247_ $$2doi$$a10.1098/rspa.2021.0507 000110775 0248_ $$2sideral$$a126031 000110775 037__ $$aART-2021-126031 000110775 041__ $$aeng 000110775 100__ $$aDowning, C.A. 000110775 245__ $$aNon-reciprocal population dynamics in a quantum trimer 000110775 260__ $$c2021 000110775 5060_ $$aAccess copy available to the general public$$fUnrestricted 000110775 5203_ $$aWe study a quantum trimer of coupled two-level systems beyond the single-excitation sector, where the coherent coupling constants are ornamented by a complex phase. Accounting for losses and gain in an open quantum systems approach, we show how the mean populations of the states in the system crucially depend on the accumulated phase in the trimer. Namely, for non-trivial accumulated phases, the population dynamics and the steady states display remarkable non-reciprocal behaviour in both the singly and doubly excited manifolds. Furthermore, while the directionality of the resultant chiral current is primarily determined by the accumulated phase in the loop, the sign of the flow may also change depending on the coupling strength and the amount of gain in the system. This directionality paves the way for experimental studies of chiral currents at the nanoscale, where the phases of the complex hopping parameters are modulated by magnetic or synthetic magnetic fields. 000110775 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E09-17R-Q-MAD$$9info:eu-repo/grantAgreement/ES/MICINN/PID2020-115221GBC41/AEI/10.13039/501100011033 000110775 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/ 000110775 590__ $$a3.213$$b2021 000110775 592__ $$a0.793$$b2021 000110775 594__ $$a4.9$$b2021 000110775 591__ $$aMULTIDISCIPLINARY SCIENCES$$b32 / 74 = 0.432$$c2021$$dQ2$$eT2 000110775 593__ $$aMathematics (miscellaneous)$$c2021$$dQ1 000110775 593__ $$aEngineering (miscellaneous)$$c2021$$dQ1 000110775 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000110775 700__ $$0(orcid)0000-0003-4478-1948$$aZueco, D. 000110775 773__ $$g477, 2255 (2021), 17$$pProc. - Royal Soc., Math. phys. eng. sci.$$tPROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES$$x1364-5021 000110775 8564_ $$s1641729$$uhttps://zaguan.unizar.es/record/110775/files/texto_completo.pdf$$yVersión publicada 000110775 8564_ $$s1755360$$uhttps://zaguan.unizar.es/record/110775/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000110775 909CO $$ooai:zaguan.unizar.es:110775$$particulos$$pdriver 000110775 951__ $$a2023-05-18-14:50:18 000110775 980__ $$aARTICLE