Bosonic quantum transport with power-law coupling: exit-site dependence
Marisa Ulfa (1), Donny Dwiputra (2,3)

(1) Department of Physics, Faculty of Mathematics and Natural Science, Jakarta State University, East Jakarta 13220, Indonesia
(2) Department of Physics, Faculty of Mathematics and Natural Science, Jakarta State University, East Jakarta 13220, Indonesia
(3) Asia Pacific Center for Theoretical Physics, Pohang Science and Technology University, Pohang 37673, South Korea

Abstract

In quantum transport experiments, atoms or photons hop between sites of a lattice while coupled to reservoirs that inject and absorb particles. When the hopping decays as a power law with distance, which is a naturally occurring interaction in trapped ions, polar molecules, and Rydberg atoms, the range of interaction is set by a single exponent. We show that by tuning the power-law hopping, the nonequilibrium steady-state particle current exhibits enhancement over the short-ranged interaction case. This enhancement of current is highly dependent on the position of the exit-site, where the particle is absorbed. Our calculations include many-body effects from the particle injection and extraction on boundaries of the system.

Keywords: Quantum transport, open quantum systems, long-range interaction, nonequilibrium current

Topic: Theory, Nuclear, and Particle Physics