Final Report on Contract N00014-91-J-1143 (University of California Irvine)

Abstract

Over the last two years, we have used several different numerical techniques to study a variety of intrinsically correlated electron systems. The three main types of numerical techniques we have used are: (1) finite- temperature quantum Monte Carlo (QMC); (2) exact diagonalization; and (3) numerical renormalization groups. We have made substantial progress both on developing and improving the numerical algorithms and in using these methods to study interesting systems. We have developed techniques for analytically continuing imaginary-time QMC data to obtain dynamical properties, and have used these techniques to study pseudogap and gap formation in the repulsive and attractive Hubbard models. We have developed a program to calculate two particle interaction vertices with full frequency and momentum dependence using QMC, and have studied possible magnetic and superconducting instabilities in the Hubbard model.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1992
Accession Number
ADA261214

Entities

People

  • Steven R. White

Organizations

  • University of California, Irvine

Tags

DTIC Thesaurus Topics

  • Algorithms
  • Charge Density
  • Electrons
  • Fullerenes
  • Ground State
  • High Temperature
  • High Temperature Superconductors
  • Materials
  • Momentum
  • Monte Carlo Method
  • Particles
  • Perturbation Theory
  • Perturbations
  • Quasiparticles
  • Superconductivity
  • Superconductors
  • Transition Temperature

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Technical Research and Report Writing.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene
  • Quantum Computing