Non-reciprocal population dynamics in a quantum trimer

Downing, C.A. ; Zueco, D.

Resumen: We 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.

Idioma: Inglés

DOI: 10.1098/rspa.2021.0507

Año: 2021

Publicado en: PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 477, 2255 (2021), 17
ISSN: 1364-5021

Factor impacto JCR: 3.213 (2021)

Categ. JCR: MULTIDISCIPLINARY SCIENCES rank: 32 / 74 = 0.432 (2021) - Q2 - T2

Factor impacto CITESCORE: 4.9 - Engineering (Q1) - Mathematics (Q1) - Physics and Astronomy (Q2)

Factor impacto SCIMAGO: 0.793 - Mathematics (miscellaneous) (Q1) - Engineering (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E09-17R-Q-MAD
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2020-115221GBC41/AEI/10.13039/501100011033

Tipo y forma: Article (Published version)