Low-temperature density matrix renormalization group using regulated polynomial expansion

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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

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/222470

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0806.3352
 http://arxiv.org/abs/0806.3352
 Phys. Rev. B 78, 113101 (2008)
 doi:10.1103/PhysRevB.78.113101

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arXiv