Nonequilibrium charge dynamics of light-driven rings threaded by a magnetic flux

Details Nonequilibrium charge dynamics of light-driven rings threaded by a magnetic flux Nonequilibrium charge dynamics of light-driven rings threaded by a magnetic flux

2007-03-19

arxiv.org/abs/cond-mat/0703502v1

EPL 78, 57001(2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 2 figures; submitted to EPL

Scientific paper

10.1209/0295-5075/78/57001

We study theoretically the charge polarization and the charge current dynamics of a mesoscopic ring driven by short asymmetric electromagnetic pulses and threaded by an external static magnetic flux. It is shown that the pulse-induced charge polarization and the associated light-emission is controllable by tuning the external magnetic flux. Applying two mutually perpendicular pulses triggers a charge current in the ring. The interplay between this nonequilibrium and the persistent currents is investigated and the conditions under which the pulses stop the persistent current are identified.

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