The half-filled Hubbard chain in the Composite Operator Method: A comparison with Bethe Ansatz
نویسندگان
چکیده
منابع مشابه
The half - filled Hubbard chain in the Composite Operator Method : A comparison with Bethe Ansatz
– The one-dimensional Hubbard model at half-filling is studied in the framework of the Composite Operator Method using a static approximation. A solution characterized by strong antiferromagnetic correlations and a gap for any nonzero on-site interaction U is found. The corresponding ground-state energy, double occupancy and specific heat are in excellent agreement with those obtained within th...
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ژورنال
عنوان ژورنال: Europhysics Letters (EPL)
سال: 1998
ISSN: 0295-5075,1286-4854
DOI: 10.1209/epl/i1998-00478-8