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Pregled bibliografske jedinice broj: 179320

Časopis

Autori: Sunko, Denis K.
Naslov: The Gutzwiller wave function as a disentanglement prescription
Izvornik: European physical journal B : condensed matter physics (1434-6028) 42 (2004); 337-344
Vrsta rada: članak
Ključne riječi: Hubbard model; Strongly correlated electron systems; Metal-insulator transitions
Sažetak:
The Gutzwiller variational wave function is shown to correspond to a particular disentanglement of the thermal evolution operator, and to be physically consistent only in the temperature range U << kT << E_F, the Fermi energy of the non-interacting system. The correspondence is established without using the Gutzwiller approximation. It provides a systematic procedure for extending the ansatz to the strong-coupling regime. This is carried out to infinite order in a dominant class of commutators. The calculation shows that the classical idea of suppressing double occupation is replaced at low temperatures by a quantum RVB-like condition, which involves phases at neighboring sites. Low-energy phenomenologies are discussed in the light of this result.
Projekt / tema: 0119256
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
SCI-EXP, SSCI i/ili A&HCI
Current Contents Connect (CCC)
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Scopus
Kategorija: Znanstveni
Znanstvena područja:
Fizika
Puni text rada: 179320.gutz_cond-mat.pdf
URL Internet adrese: http://arxiv.org/abs/cond-mat/0404139
http://www.springerlink.com/index/10.1140/epjb/e2004-00388-1
URL cjelovitog teksta:
Google Scholar: The Gutzwiller wave function as a disentanglement prescription



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