Giant coherence in driven systems (2005)
Roy, Soumen, Dan, Debasis, Jayannavar, A. M.
We study the noise-induced currents and reliability or coherence of transport in two different classes of rocking ratchets. For this, we consider the motion of Brownian particles in the over damped...
Dan, Debasis, Mueller, Chris, Chen, Kun, Glazier, James A.
The Cellular Potts Model (CPM) is a robust, cell-level methodology for simulation of biological tissues and morphogenesis. Both tissue physiology and morphogenesis depend on diffusion of chemical...
Noise induced currents and reliability of transport in frictional ratchets (2005)
Krishnan, Raishma, Dan, Debasis, Jayannavar, A. M.
We study the coherence of transport of an overdamped Brownian particle in frictional ratchet system in the presence of external Gaussian white noise fluctuations. The analytical expressions for the...
Diffusion accompanying noise induced transport in frictional ratchets (2004)
Krishnan, Raishma, Dan, Debasis, Jayannavar, A. M.
We study the noise induced transport of an overdamped Brownian particle in frictional ratchet systems in the presence of external Gaussian white noise fluctuations. The analytical expressions for...
Transport Coherence in Frictional Ratchets (2003)
Krishnan, Raishma, Dan, Debasis, Jayannavar, A. M.
We study the phenomena of noise induced transport in frictional ratchet systems. For this we consider a Brownian particle moving in a space dependent frictional medium in the presence of external...
Bona fide Stochastic Resonance: A view point from stochastic energetics (2003)
Dan, Debasis, Jayannavar, A. M.
We investigate the resonance type behaviour of an overdamped Brownian particle in a bistable potential driven by external periodic signal. It has been shown previously that the input energy pumped...
Giant diffusion and coherent transport in tilted periodic inhomogeneous systems (2002)
Dan, Debasis, Jayannavar, A. M.
We investigate the dynamics of an overdamped Brownian particle moving in a washboard potential with space dependent friction coefficient. Analytical expressions have been obtained for current and...
A Biologically Inspired Ratchet Model of Two Coupled Brownian Motors (2002)
Dan, Debasis, Jayannavar, A. M., Menon, Gautam I.
A ratchet model for coupled Brownian motors, inspired by the motion of individual two-headed molecular motors on cytoskeletal filaments, is proposed. Such motors are modeled as two elastically...
Energetics of rocked inhomogeneous ratchets (2001)
Dan, Debasis, Jayannavar, A. M.
We study the efficiency of frictional thermal ratchets driven by finite frequency driving force and in contact with a heat bath. The efficiency exhibits varied behavior with driving frequency. Both...
AC driven thermal ratchets (2001)
Dan, Debasis, Jayannavar, A. M., Mahato, Mangal C.
We consider the motion of a overdamped Brownian particle in periodic asymmetric potential with space dependent friction coefficient. In the presence of external time periodic forcing, the system...
Multiple current reversals in forced inhomogeneous ratchets (2000)
Dan, Debasis, Mahato, Mangal C., Jayannavar, A. M.
Transport properties of overdamped Brownian paricles in a rocked thermal ratchet with space dependent friction coefficient is studied. By tuning the parameters, the direction of current exhibit...
Motion in a rocked ratchet with spatially periodic friction (2000)
Dan, Debasis, Mahato, Mangal C., Jayannavar, A. M.
We present a detailed study of the transport and energetics of a Brownian particle moving in a periodic potential in the presence of an adiabatic external periodic drive. The particle is considered...
Efficiency and current reversals in spatially inhomogeneous ratchets (1999)
Dan, Debasis, Mahato, Mangal C., Jayannavar, A. M.
Efficiency of generation of net unidirectional current in an adiabatically driven symmetric periodic potential system is studied. The efficiency shows a maximum, in the case of an inhomogeneous...
Mobility and stochastic resonance in spatially inhomogeneous system (1999)
Dan, Debasis, Mahato, Mangal C., Jayannavar, A. M.
The mobility of an overdamped particle, in a periodic potential tilted by a constant external field and moving in a medium with periodic friction coefficient is examined. When the potential and the...
Stochastic Resonance in Washboard Potentials (1999)
Dan, Debasis, Mahato, Mangal. C., Jayannavar, A. M.
We study the mobility of an overdamped particle in a periodic potential tilted by a constant force. The mobility exhibits a stochastic resonance in inhomogeneous systems with space dependent friction...