Abstract
The one-band Hubbard model is considered in the slave-boson formulation first introduced by Kotliar and Ruckenstein. It is shown that a mean-field approximation, where broken-symmetry states appropriate for a bipartite lattice are allowed, leads to a quantitative agreement with quantum Monte Carlo results for local observables over a wide range of interactions (0U\ensuremath{\le}20t) and doping (0n〉\ensuremath{\le}1). Thus, our saddle-point solutions constitute an excellent starting point for a systematic treatment of fluctuations.
Keywords
PhysicsQuantum Monte CarloSlave bosonHubbard modelSaddleBosonSaddle pointMonte Carlo methodObservableStatistical physicsQuantum mechanicsSuperconductivityMathematicsStatistics
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Publication Info
- Year
- 1990
- Type
- article
- Volume
- 65
- Issue
- 11
- Pages
- 1379-1382
- Citations
- 97
- Access
- Closed
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Cite This
L. Lilly,
A. Muramatsu,
W. Hanke
(1990).
Slave-boson mean field versus quantum Monte Carlo results for the Hubbard model.
Physical Review Letters
, 65
(11)
, 1379-1382.
https://doi.org/10.1103/physrevlett.65.1379
Identifiers
- DOI
- 10.1103/physrevlett.65.1379