Wavefront solution in extended quantum circuits with charge discreteness

Details Wavefront solution in extended quantum circuits with charge discreteness Wavefront solution in extended quantum circuits with charge discreteness

2006-03-13

arxiv.org/abs/cond-mat/0603356v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

1 FIGURE

Scientific paper

10.1103/PhysRevB.74.193319

A wavefront solution for quantum (capacitively coupled) transmission lines with charge discreteness (PRB {\bf 64}, 235309 (2001)) is proposed for the first time. The nonlinearity of the system becomes deeply related to charge discreteness. The wavefront velocity is found to depend on a step discontinuity on the (pseudo) flux variable, $f$, displaying allowed and forbidden regions (gaps), as a function of $f$. A preliminary study of the stability of the solutions is presented. The dual transmission line hamiltonian is proposed and finally, we find a connection with the (quantum) Toda lattice.

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