Nonlinear Waves Seminar - Sathyha Chandramouli

Sathya Chandramouli, Department of Mathematics and Statistics, University of Massachusetts Amherst

Transcritical flow problem in the nonlinear Schrödinger equation with Wadati potential

A past work led to the identification of a class of Riemann problems to a transformed nonlinear Schrödinger equation with complex Wadati potential. Here, features reminiscent of the classical transcritical flow (resonant generation of dispersive shock waves) problem (Grimshaw and Smyth, '86), (Leszczyszyn, '09) were observed.  The present work defines and substantiates the optical flow over a Wadati "obstacle". Here, the difference between earlier studies on the transcritical condensate flow over a penetrable barrier (Leszczyszyn, '09) correspond to an attractive (or focusing) optical barrier (potential), and crucially, the presence of an externally imposed gain-loss landscape. An appropriate scaling symmetry defines a three-parameter family of optical flow problems. We classify and study these flow patterns with a combination of numerical simulations and hydraulic theory. This is joint work with Prof. Mark Hoefer and Dr. Patrick Sprenger.



Dial-In Information 

Tuesday, April 2 at 4:00pm to 5:00pm

Engineering Center, ECOT 317
1111 Engineering Drive, Boulder, CO 80309

Event Type



Science & Technology, Research & Innovation


Students, Graduate Students

College, School & Unit

Engineering & Applied Science


nonlinear waves seminar

Applied Mathematics
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