67 citations · 845 across the 53 of their papers we have counts for
12 papers · 1 filter
Dissipative tunneling in presence of classical chaos in a mixed quantum-classical system
Bidhan Chandra Bag, Bikash Chandra Gupta, Debshankar Ray
We consider the tunneling of a wave packet through a potential barrier which is coupled to a nonintegrable classical system and study the interplay of classical chaos and dissipati…
The generalized Kramers' theory for an external noise driven bath
Jyotipratim Ray Chaudhuri, Suman Kumar Banik, Deb Shankar Ray
We consider a system-reservoir model where the reservoir is modulated by an external noise. Both the internal noise of the reservoir and the external noise are stationary, Gaussian…
The generalized Kramers' theory for nonequilibrium open one-dimensional systems
Suman Kumar Banik, Jyotipratim Ray Chaudhuri, Deb Shankar Ray
The Kramers' theory of activated processes is generalized for nonequilibrium open one-dimensional systems. We consider both the internal noise due to thermal bath and the external…
Quantum noise-induced chaotic oscillations
Bidhan Chandra Bag, Deb Shankar Ray
We examine the weak quantum noise limit of Wigner equation for phase space distribution functions. It has been shown that the leading order quantum noise described in terms of an a…
Barrier crossing induced by very slow external noise
Suman Kumar Banik, Jyotipratim Ray Chaudhuri, Deb Shankar Ray
We consider the motion of a particle in a force field subjected to adiabatic, fluctuations of external origin. We do not put the restriction on the type of stochastic process that…
A simple semiclassical approach to Kramers' problem
Jyotipratim Ray Chaudhuri, Bidhan Chandra Bag, Deb Shankar Ray
We show that Wigner-Leggett-Caldeira equation for Wigner phase space distribution function which describes the quantum Brownian motion of a particle in a force field in a high teme…