We discuss uniform sampling algorithms that are based on stochastic growth methods, using sampling of extreme configurations of polymers in simple lattice models as a motivation. We shall show how a series of clever enhancements to a fifty-odd year old algorithm, the Rosenbluth method, led to a cutting-edge algorithm capable of uniform sampling of equilibrium statistical mechanical systems of p...

Zonal ‡ow helps reduce the turbulent transport level in tokamaks. Rosenbluth and Hinton have shown that zonal ‡ow damps to to a non-vanishing residual level in collisionless and collisional banana regime plasmas Recent zonal ‡ow advances are summarized including the evaluation of the e¤ects on this zonal ‡ow residual of plasma cross section shaping, shorter wavelengths including those less than...

Abstract The influence of sinusoidal density modulation on stimulated Raman scattering (SRS) reflectivity in inhomogeneous plasmas is studied using three-wave coupling equations, fully kinetic Vlasov simulations, and particle-in-cell (PIC) simulations. Through a numerical solution the we find that capable inducing absolute SRS even though Rosenbluth gain smaller than π , describe region modulat...

Y. Kaga,1 W. J. Shoemaker,2 M. Furusho,1 M. Bryant,1 J. Rosenbluth,3 S. E. Pfeiffer,1 L. Oh,1 M. Rasband,1 C. Lappe-Siefke,4 K. Yu,5 D. M. Ornitz,5 K.-A. Nave,4 and R. Bansal1 Departments of 1Neuroscience and 2Psychiatry, University of Connecticut Medical School, Farmington, Connecticut 06030, 3Department of Physiology and Neuroscience, New York University School of Medicine, New York, New York...

Recent measurements of recoil polarization in elastic scattering have been used to extract the ratio of the electric to the magnetic proton form factors. These results disagree with Rosenbluth extractions from cross section measurements, indicating either an inconsistency between the two techniques, or a problem with either the polarization transfer or cross section measurements. To obtain prec...

We study the influence of structural obstacles in a disordered environment on the size and shape characteristics of long flexible polymer macromolecules. We use the model of self-avoiding random walks on diluted regular lattices at the percolation threshold in space dimensions d = 2, 3. Applying the Pruned-Enriched Rosenbluth Method (PERM), we numerically estimate rotationally invariant univers...

We evaluate the two-photon exchange contribution to the eN → e∆(1232) → eπN process at large momentum transfer with the aim of a precision study of the ratios of electric quadrupole (E2) and Coulomb quadrupole (C2) to the magnetic dipole (M1) γN∆ transitions. We relate the two-photon exchange amplitude to the N → ∆ generalized parton distributions and obtain a quantitative estimate of the two-p...

We study an off-lattice protein toy model with two species of monomers interacting through modified Lennard-Jones interactions. Low energy configurations are optimized using the pruned-enriched-Rosenbluth method (PERM), hitherto employed to native state searches only for off-lattice models. For two dimensions we found states with lower energy than previously proposed putative ground states for ...