Charge fluctuations in coupled systems: ring coupled to a wire or ring

Details Charge fluctuations in coupled systems: ring coupled to a wire or ring Charge fluctuations in coupled systems: ring coupled to a wire or ring

2005-05-27

arxiv.org/abs/cond-mat/0505672v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

minor corrections

Scientific paper

Coupled systems in mesoscopic regime are of interest as charge fluctuation between the sub-systems will depend on electron-electron interactions and will play a dominant role in determining their thermodynamic properties. We study some simple systems like a stub or a bubble strongly coupled to a ring. We show that for strong electron-electron interaction, there are some regimes where these charge fluctuations are quenched and charge is individually conserved in the two subsystems. This feature does not depend on choice of parameters or charge distribution.

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