41 citations · 202 across the 10 of their papers we have counts for
10 papers
Structural disorder and critical voltage scaling in Al/AlOx/Al Josephson junction arrays
Amanuel M. Berhane, Susan Coppersmith, Emma Mitchell +1
The insulating state of one-dimensional Josephson junction (JJ) arrays is governed by collective charge dynamics and disorder-induced pinning, resulting in a finite critical voltag…
The computational complexity of Kauffman nets and the P versus NP problem
S. N. Coppersmith
Complexity theory as practiced by physicists and computational complexity theory as practiced by computer scientists both characterize how difficult it is to solve complex problems…
Ground states of two-dimensional J Edwards-Anderson spin glasses
J. W. Landry, S. N. Coppersmith
We present an exact algorithm for finding all the ground states of the two-dimensional Edwards-Anderson spin glass and characterize its performance. We investigate how the…
Weak Long-Ranged Casimir Attraction in Colloidal Crystals
Ajay Gopinathan, Tong Zhou, S. N. Coppersmith +2
We investigate the influence of geometric confinement on the free energy of an idealized model for charge-stabilized colloidal suspensions. The mean-field Poisson-Boltzmann formula…
Reversible boolean networks II: Phase transition, oscillation, and local structures
S. N. Coppersmith, Leo P. Kadanoff, Zhitong Zhang
We continue our consideration of a class of models describing the reversible dynamics of Boolean variables, each with inputs. We investigate in detail the behavior of the H…
A scalar model of inhomogeneous elastic and granular media
M. L. Nguyen, S. N. Coppersmith
We investigate theoretically how the stress propagation characteristics of granular materials evolve as they are subjected to increasing pressures, comparing the results of a two-d…
Reversible Boolean Networks I: Distribution of Cycle Lengths
S. N. Coppersmith, Leo P. Kadanoff, Zhitong Zhang
We consider a class of models describing the dynamics of Boolean variables, where the time evolution of each depends on the values of of the other variables. Previous work…
Noise Stabilization of Self-Organized Memories
M. L. Povinelli, S. N. Coppersmith, L. P. Kadanoff +2
We investigate a nonlinear dynamical system which ``remembers'' preselected values of a system parameter. The deterministic version of the system can encode many parameter values d…
Properties of layer-by-layer vector stochastic models of force fluctuations in granular materials
M. L. Nguyen, S. N. Coppersmith
We attempt to describe the stress distributions of granular packings using lattice-based layer-by-layer stochastic models that satisfy the constraints of force and torque balance a…
Self-Organized Short-Term Memories
S. N. Coppersmith, T. C. Jones, L. P. Kadanoff +5
We report short-term memory formation in a nonlinear dynamical system with many degrees of freedom. The system ``remembers'' a sequence of impulses for a transient period, but it c…