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Numerical Study of One‐Dimensional Strongly Correlated Systems
Author(s) -
Kumari K.,
Singh I.
Publication year - 1995
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221900214
Subject(s) - pairing , hubbard model , singlet state , inverse , condensed matter physics , quantum monte carlo , monte carlo method , physics , square (algebra) , statistical physics , moment (physics) , mathematics , quantum mechanics , superconductivity , statistics , geometry , excited state
The path‐integral formulation along with the quantum Monte Carlo method is used to study the physical properties of the one‐dimensional Hubbard model for various band fillings and values of interaction strength U . Results for singlet and triplet pairing correlations, local square magnetic moment, total energy, probability of double occupancy, and nearest‐neighbour charge‐density correlations are presented. These results are explored at β (inverse temperature) = 2.0, 1.0, and 0.5 for the linear chain N = 16. These results show that the effect of correlation on the physical quantities is small for low band‐filling and it becomes most evident for the half‐filled band at finite temperatures.