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10 papers
Time-step targetting methods for real-time dynamics using DMRG
Adrian E. Feiguin, Steven R. White
We present a time-step targetting scheme to simulate real-time dynamics efficiently using the density matrix renormalization group (DMRG). The algorithm works on ladders and system…
Real time evolution using the density matrix renormalization group
Steven R. White, Adrian E. Feiguin
We describe an extension to the density matrix renormalization group method incorporating real time evolution into the algorithm. Its application to transport problems in systems o…
The transition between hole-pairs and four-hole clusters in four-leg tJ ladders
Thomas Siller, Matthias Troyer, T. M. Rice +1
Holes weakly doped into a four-leg \tj ladder bind in pairs. At dopings exceeding a critical doping of four hole clusters are observed to form in DMRG calculation…
Li Induced Spin and Charge Excitations in a Spin Ladder
Andreas Laeuchli, Didier Poilblanc, T. M. Rice +1
A lithium dopant in a cuprate spin ladder acts as a vacant (non-magnetic) site accompanied by an extra hole bound by a Coulomb potential. We find that, although the undoped ladder…
Numerical Results for the Hubbard Model: Implications for the High Tc Pairing Mechanism
Douglas J. Scalapino, Steven R. White
Numerical studies of the Hubbard model and its strong-coupling form, the t-J model, show evidence for antiferromagnetic, d_{x^2-y^2}-pairing and stripe correlations which remind on…
Why do stripes form in doped antiferromagnets and what is their relationship to superconductivity?
Steven R. White, D. J. Scalapino
Experiments show evidence for stripe formation in the underdoped cuprates. Here we discuss recent numerical calculations on the t-J model which tell us about the mechanism responsi…