Exact calculation of thermodynamical quantities of the integrable t-J model

Details Exact calculation of thermodynamical quantities of the integrable t-J model Exact calculation of thermodynamical quantities of the integrable t-J model

1996-06-25

arxiv.org/abs/cond-mat/9606192v1

Physics

Condensed Matter

4 pages, 5 Postscript figures, uses epsf.sty and revtex, tar'ed, gzip'ed and uuencoded

Scientific paper

The specific heat and the compressibility for the integrable t-J model are calculated showing Luttinger liquid behavior for low temperatures. A Trotter-Suzuki mapping and the quantum transfer matrix approach are utilized. Using an algebraic Bethe ansatz this method permits the exact calculation of the free energy and related quantities. A set of just two non-linear integral equations determining these quantities is studied for various particle densities and temperatures. The structure of the specific heat is discussed in terms of the elementary charge as well as spin excitations.

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