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"Stochastic Resonance in Atomic Optical Bistability and Nano Scale Systems"

Dr. Amitabh Joshi
Department of Physics
Eastern Illinois University


In this talk the phenomenon of stochastic resonance (SR), which is experimentally demonstrated in an atomic optical bistable system of three-level atoms in Λ-type configuration, confined in an optical ring cavity will be discussed. The optical bistable system with enhanced Kerr nonlinearity due to atomic coherence is driven by Gaussian white noise with variable amplitude and a periodic signal, displays an improved output signal-to-noise ratio, a characteristic signature of SR. The measured results match qualitatively with the theoretical predictions of the generic model for the SR phenomenon. The SR phenomenon in nanocantilever based biosensors and double quantum dot systems will also be discussed.

Tuesday, April 16, 2013
IQSE 578, 10:00 a.m.
Mitchell Physics Building

Institute for Quantum Science and Engineering
Texas A&M University

(Coffee and cookies to be served 15 minutes before start time)

Host: Marlan Scully