University of California, Davis

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19912026

most citedSciPy 1.0--Fundamental Algorithms for Scientific Computing in Python

40.2k citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

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Showing 2003 · cond-mat.str-elShow all

10 papers · 2 filters

cond-mat.str-el2003★ 15 cited

Phase separation in the bosonic Hubbard model with ring exchange

V. Rousseau, G. G. Batrouni, R. T. Scalettar

We show that soft core bosons in two dimensions with a ring exchange term exhibit a tendency for phase separation. This observation suggests that the thermodynamic stability of nor…

cond-mat.str-el2003★ 2 cited

Criticality in coupled quantum spin-chains with competing ladder-like and two-dimensional couplings

Pinaki Sengupta, Weihong Zheng, Rajiv R. P. Singh

Motivated by the geometry of spins in the material CaCu $_{2}$ O $_{3}$ , we study a two-layer, spin-half Heisenberg model, with nearest-neighbor exchange couplings J and α*J along the two…

cond-mat.str-el2003★ 27 cited

Dynamical Structure Factor for the Alternating Heisenberg Chain: A Linked Cluster Calculation

Chris J. Hamer, Weihong Zheng, Rajiv R. P. Singh

We develop a linked cluster method to calculate the spectral weights of many-particle excitations at zero temperature. The dynamical structure factor is expressed as a sum of exclu…

cond-mat.str-el2003★ 124 cited

Specific heat of quasi-2D antiferromagnetic Heisenberg models with varying inter-planar couplings

Pinaki Sengupta, Anders W. Sandvik, Rajiv R. P. Singh

We have used the stochastic series expansion (SSE) quantum Monte Carlo (QMC) method to study the three-dimensional (3D) antiferromagnetic Heisenberg model on cubic lattices with in…

cond-mat.str-el2003★ 160 cited

Local quantum criticality in confined fermions on optical lattices

M. Rigol, A. Muramatsu, G. G. Batrouni +1

Using quantum Monte Carlo simulations, we show that the one-dimensional fermionic Hubbard model in a harmonic potential displays quantum critical behavior at the boundaries of a Mo…

cond-mat.str-el2003★ 56 cited

A closer look at symmetry breaking in the collinear phase of the $J_{1} - J_{2}$ Heisenberg Model

R. R. P. Singh, W. Zheng, J. Oitmaa +2

The large $J_{2}$ limit of the square-lattice $J_{1} - J_{2}$ Heisenberg antiferromagnet is a classic example of order by disorder where quantum fluctuations select a collinear ground stat…

cond-mat.str-el2003★ 28 cited

Interacting electrons in a two-dimensional disordered environment: Effect of a Zeeman magnetic field

P. J. H. Denteneer, R. T. Scalettar

The effect of a Zeeman magnetic field coupled to the spin of the electrons on the conducting properties of the disordered Hubbard model is studied. Using the Determinant Quantum Mo…

cond-mat.str-el2003★ 48 cited

Peierls transition in the presence of finite-frequency phonons in the one-dimensional extended Peierls-Hubbard model at half-filling

P. Sengupta A. W. Sandvik, D. K. Campbell

We report quantum Monte Carlo (stochastic series expansion) results for the transition from a Mott insulator to a dimerized Peierls insulating state in a half-filled, 1D extended H…

cond-mat.str-el2003★ 22 cited

The Dynamical Cluster Approximation (DCA) versus the Cellular Dynamical Mean Field Theory (CDMFT) in strongly correlated electrons systems

K. Aryanpour, Th. A. Maier, M. Jarrell

We are commenting on the article Phys. Rev. {\bf B 65}, 155112 (2002) by G. Biroli and G. Kotliar in which they make a comparison between two cluster techniques, the {\it Cellular…