51 citations · 99 across the 6 of their papers we have counts for
7 papers · 1 filter
Noise-induced transition in a quantum system
Pulak Kumar Ghosh, Debashis Barik, Deb Shankar Ray
We examine the noise-induced transition in a fluctuating bistable potential of a driven quantum system in thermal equilibrium. Making use of a Wigner canonical thermal distribution…
Quantum state-dependent diffusion and multiplicative noise: a microscopic approach
Debashis Barik, Deb Shankar Ray
The state-dependent diffusion, which concerns the Brownian motion of a particle in inhomogeneous media has been described phenomenologically in a number of ways. Based on a system-…
Noise-induced quantum transport
Pulak Kumar Ghosh, Debashis Barik, Deb Shankar Ray
We analyze the problem of directed quantum transport induced by external exponentially correlated telegraphic noise. In addition to quantum nature of the heat bath, nonlinearity of…
A numerical method for generation of quantum noise and solution of generalized c-number quantum Langevin equation
Dhruba Banerjee, Bidhan Chandra Bag, Suman Kumar Banik +1
Based on a coherent state representation of noise operator and an ensemble averaging procedure we have recently developed [Phys. Rev. E {\bf 65}, 021109 (2002); {\it ibid.} 051106…
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…
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…