Flat Energy histogram version for Interacting Growth Walk (2007)
Ponmurugan, M., Sridhar, V., Narasimhan, S. L., Murthy, K. P. N.
Interacting Growth Walks is a recently proposed stochastic model for studying the coil-globule transition of linear polymers. We propose a flat energy histogram version for Interacting Growth Walk....
Narasimhan, S. L., Krishna, P. S. R., Ponmurugan, M., Murthy, K. P. N.
We have explained in detail why the canonical partition function of Interacting Self Avoiding Walk (ISAW), is exactly equivalent to the configurational average of the weights associated with growth...
MIMO detection employing Markov Chain Monte Carlo (2007)
Sundaram, V., Murthy, K. P. N.
We propose a soft-output detection scheme for Multiple-Input-Multiple-Output (MIMO) systems. The detector employs Markov Chain Monte Carlo method to compute bit reliabilities from the signals...
Coil-Globule transition of a single short polymer chain - an exact enumeration study (2007)
Ponmurugan, M., Narasimhan, S. L., Krishna, P. S. R., Murthy, K. P. N.
We present an exact enumeration study of short SAWs in two as well as three dimensions that addresses the question, `what is the shortest walk for which the existence of all the three phases - coil,...
Jayasri, D., Satyavathi, N., Sastry, V. S. S., Murthy, K. P. N.
We investigate Isotropic - Nematic transition in liquid crystal elastomers employing non-Boltzmann Monte Carlo techniques. We consider a lattice model of a liquid elastomer and Selinger-Jeon-Ratna...
Is Kinetic Growth Walk equivalent to canonical Self Avoiding Walk? (2006)
Ponmurugan, M., Narasimhan, S. L., Murthy, K. P. N.
We present a Monte Carlo study of Kinetic Growth Walk on square as well as triangular lattice to show that it is not equivalent to canonical Self Avoiding Walk.
Ludwig Boltzmann, Transport Equation and the Second Law (2006)
Ludwig Boltzmann had a hunch that irreversibility exhibited by a macroscopic system arises from the reversible dynamics of its microscopic constituents. He derived a nonlinear integro-differential...
Wang-Landau Monte Carlo simulation of isotropic-nematic transition in liquid crystals (2005)
Jayasri, D., Sastry, V. S. S., Murthy, K. P. N.
Wang and Landau proposed recently, a simple and flexible non-Boltzmann Monte Carlo method for estimating the density of states, from which the macroscopic properties of a closed system can be...
Bayesian Restoration of Digital Images Employing Markov Chain Monte Carlo a Review (2005)
Murthy, K. P. N., Janani, M., Priya, B. Shenbga
A review of Bayesian restoration of digital images based on Monte Carlo techniques is presented. The topics covered include Likelihood, Prior and Posterior distributions, Poisson, Binay symmetric...
Can coarse-graining introduce long-range correlations in a symbolic sequence? (2004)
Narasimhan, S. L., Nathan, Joseph A., Murthy, K. P. N.
We present an exactly solvable mean-field-like theory of correlated ternary sequences which are actually systems with two independent parameters. Depending on the values of these parameters, the...
A formalism for studying long-range correlations in many-alphabets sequences (2004)
Narasimhan, S. L., Nathan, Joseph A., Krishna, P. S. R., Murthy, K. P. N.
We formulate a mean-field-like theory of long-range correlated $L$-alphabets sequences, which are actually systems with $(L-1)$ independent parameters. Depending on the values of these parameters,...
Interacting Growth Walk - a model for hyperquenched homopolymer glass? (2002)
Narasimhan, S. L., Krishna, P. S. R., Rajarajan, A. K., Murthy, K. P. N.
We show that the compact self avoiding walk configurations, kinetically generated by the recently introduced Interacting Growth Walk (IGW) model, can be considered as members of a canonical ensemble...
Interacting Growth Walk on a honeycomb lattice (2002)
Narasimhan, S. L., Krishna, P. S. R., Ramanadham, M., Murthy, K. P. N., Sridhar, V.
The Interacting Growth Walk (IGW) is a kinetic algorithm proposed recently for generating long, compact, self avoiding walks. The growth process in IGW is tuned by the so called growth temperature...
Protein folding simulations with Interacting Growth Walk model (2001)
Narasimhan, S. L., Krishna, P. S. R., Ramanadham, M., Murthy, K. P. N., Chidambaram, R.
We demonstrate that the recently proposed interacting growth walk (IGW) model, modified for generating self-avoiding heteropolymers, proves to be a simpler alternative to the other Monte Carlo...
Comment on "Peculiar Scaling of Self-Avoiding Walk Contacts" (2001)
Narasimhan, S. L., Krishna, P. S. R., Murthy, K. P. N., Ramanadham, M.
We demonstrate that the recently proposed Interacting Growth Walk (cond-mat/0108097) does not have the contact-scaling behaviour of Self-Avoiding Walk (M. Baiesi, E. Orlandini and A. L. Stella, Phys....
A new monte carlo algorithm for growing compact Self Avoiding Walks (2001)
Narasimhan, S. L., Krishna, P. S. R., Murthy, K. P. N., Ramanadham, M.
We propose an algorithm based on local growth rules for kinetically generating self avoiding walk configurations at any given temperature. This algorithm, called the Interacting Growth Walk (IGW)...
Nematic - Isotropic Transition in Porous Media - a Monte Carlo Study (2001)
Venu, K., Sastri, V. S. S., Murthy, K. P. N.
We propose a lattice model to simulate the influence of porous medium on the Nematic - Isotropic transition of liquid crystal confined to the pores. The effects of pore size and pore connectivity are...
An introduction to the basics of Monte Carlo is given. The topics covered include, sample space, events, probabilities, random variables, mean, variance, covariance, characteristic function,...
An Introduction to Monte Carlo Simulation of Statistical physics Problem (2001)
A brief introduction to the technique of Monte Carlo simulations in statistical physics is presented. The topics covered include statistical ensembles random and pseudo random numbers, random...
Persistence and Life Time Distribution in Coarsening Phenomen (2001)
Sridhar, V., Murthy, K. P. N., Valsakumar, M. C.
We investigate the life time distribution in one and two dimensional coarsening processes modelled by Ising - Glauber dynamics at zero temperature. We find that the life time distribution obeys a...
Sticky Spheres, Entropy barriers and Non-equilibrium phase transitions (2001)
Narasimhan, S. L., Krishna, P. S. R., Murthy, K. P. N.
A sticky spheres model to describe slow dynamics of a non-equilibrium system is proposed. The dynamical slowing down is due to the presence of entropy barriers. We present an exact mean field...
Connection between Dispersive Transport and Statistics of Extreme Events (1999)
Kehr, K. W., Murthy, K. P. N., Ambaye, H.
A length dependence of the effective mobility in the form of a power law, B ~ L^(1-1/alpha) is observed in dispersive transport in amorphous substances, with 0 < \alpha < 1. We deduce this behavior...
Relaxation at late stages in an entropy barrier model for glassy systems (1997)
The ground state dynamics of an entropy barrier model proposed recently for describing relaxation of glassy systems is considered. At stages of evolution the dynamics can be described by a simple...
Diffusion and Trapping on a one-dimensional lattice (1996)
Giacometti, Achille, Murthy, K. P. N.
The properties of a particle diffusing on a one-dimensional lattice where at each site a random barrier and a random trap act simultaneously on the particle are investigated by numerical and...
Iterated Function System and Diffusion in the Presence of Disorder and Traps (1995)
Wichmann, Thomas, Giacometti, Achille, Murthy, K. P. N.
The escape probability $\xi_{x}$ from a site $x$ of a one-dimensional disordered lattice with trapping is treated as a discrete dynamical evolution by random iterations over nonlinear maps...