= Chandra Raman
{c}
{tag=Physicist}
An experimental <atomic physicist> who coauthored a test of dissipation in a <Bose-Einstein condensate>. A blue-detuned <laser> beam acted as a moving obstacle inside the gas. Strong heating appeared only above a critical speed, making motion of a controlled perturbation a probe of <superfluidity> and its breakdown.<Evidence for a Critical Velocity in a Bose-Einstein Condensed Gas by C. Raman and others>[Abstract: moving laser beam and critical onset of heating]{ref}
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