117 citations · 479 across the 11 of their papers we have counts for
11 papers
Zero Droplet Stiffness Exponent is Revealed in Short Range Spin Glasses when Probed with Large Avalanches Induced by Long Range Interactions
Ferenc Pazmandi, Gergely T. Zimanyi
We probe the droplet excitations in short range spin glasses by adding a perturbative long range interaction that decays with distance as a power law: . It is shown that if…
Reversal-field memory in magnetic hysteresis
H. G. Katzgraber, F. Pazmandi, C. R. Pike +4
We report results demonstrating a singularity in the hysteresis of magnetic materials, the reversal-field memory effect. This effect creates a nonanalyticity in the magnetization c…
Reversal-Field Memory in the Hysteresis of Spin Glasses
H. G. Katzgraber, F. Pazmandi, C. R. Pike +4
We report a novel singularity in the hysteresis of spin glasses, the reversal-field memory effect, which creates a non-analyticity in the magnetization curves at a particular point…
Theoretical modeling of prion disease incubation
R. V. Kulkarni, A. Slepoy, R. R. P. Singh +3
We present a theory for the laboratory and epidemiological data for incubation times in infectious prion diseases. The central feature of our model is that slow growth of misfolded…
Hysteretic Optimization
G. Zarand, F. Pazmandi, K. F. Pal +1
We propose a new optimization method based on a demagnetization procedure well known in magnetism. We show how this procedure can be applied as a general tool to search for optimal…
On the statistical mechanics of prion diseases
A. Slepoy, R. R. P. Singh, F. Pázmándi +2
We simulate a two-dimensional, lattice based, protein-level statistical mechanical model for prion diseases (e.g., Mad Cow disease) with concommitant prion protein misfolding and a…
Disorder Averaging and Finite Size Scaling
Karim Bernardet, Ferenc Pazmandi, G. G. Batrouni
We propose a new picture of the renormalization group (RG) approach in the presence of disorder, which considers the RG trajectories of each random sample (realization) separately…
Self-organized criticality in the hysteresis of the Sherrington - Kirkpatrick model
Ferenc Pazmandi, Gergely Zarand, Gergely T. Zimanyi
We study hysteretic phenomena in random ferromagnets. We argue that the angle dependent magnetostatic (dipolar) terms introduce frustration and long range interactions in these sys…
Revisiting the Theory of Finite Size Scaling in Disordered Systems: νCan Be Less Than 2/d
Ferenc Pazmandi, Richard T. Scalettar, Gergely T. Zimanyi
For phase transitions in disordered systems, an exact theorem provides a bound on the finite size correlation length exponent: ν_{FS}<= 2/d. It is believed that the true critical e…
Direct Mott Insulator-to-Superfluid Transition in the Presence of Disorder
Ferenc Pazmandi, Gergely T. Zimanyi
We introduce a new renormalization group theory to examine the quantum phase transitions upon exiting the insulating phase of a disordered, strongly interacting boson system. For w…
Theory for Quantum Spin and Vortex Glasses
Ferenc Pazmandi, Gergely T. Zimanyi, Richard T. Scalettar
We develop a theory for the quantum vortex glass, with both the coupling strengths and the site energies disordered. This model is closely related to XY spin glasses and bosons in…