The discrete nonlinear Schrodinger equation (DNLS) in an annular geometry with on-site defects was discussed. It was found that a plane wave travels coherently through the randomly distributed defects, in the superfluid regime, which occurred above a critical value of nonlinearity. The implications for the physics of Bose-Einstein condensate gases trapped in optical potential and of arrays of optical fibers were also reported.
Superfluidity versus disorder in the discrete nonlinear Schrödinger equation
Trombettoni A.;Smerzi A.;
2002-01-01
Abstract
The discrete nonlinear Schrodinger equation (DNLS) in an annular geometry with on-site defects was discussed. It was found that a plane wave travels coherently through the randomly distributed defects, in the superfluid regime, which occurred above a critical value of nonlinearity. The implications for the physics of Bose-Einstein condensate gases trapped in optical potential and of arrays of optical fibers were also reported.File in questo prodotto:
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