Low-temperature density matrix renormalization group using regulated polynomial expansion

Abstract

We propose a density matrix renormalization group (DMRG) technique at finite temperatures. As is the case of the ground state DMRG, we use a single-target state that is calculated by making use of a regulated polynomial expansion. Both static and dynamical quantities are obtained after a random-sampling and averaging procedure. We apply this technique to the one-dimensional Hubbard model at half filling and find that this gives excellent results at low temperatures.

5 pages, 3 figures. Accepted for publication in Phys. Rev. B

References in corpus (8)

• Finite Temperature Density Matrix Renormalization using an enlarged Hilbert space
• Thermodynamics of the anisotropic Heisenberg chain calculated by the density matrix renormalization group method
• Optical conductivity of the half-filled Hubbard chain
• Low Temperature Lanczos Method
• Thermodynamics and excitations of the one-dimensional Hubbard model
• Thermodynamic Density Matrix renormalization Group Study of the Magnetic Susceptibility of Half-integer Quantum Spin Chains
• Dynamical density matrix renormalization group study of photoexcited states in one-dimensional Mott insulators
• Temperature and Dimensionality Dependences of Optical Absorption Spectra in Mott Insulators

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