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Finite size effects in the XXZ and sine-Gordon models with two boundaries

Title
Finite size effects in the XXZ and sine-Gordon models with two boundaries
Authors
Ahn C.Nepomechie R.I.
Ewha Authors
안창림
SCOPUS Author ID
안창림scopus
Issue Date
2004
Journal Title
Nuclear Physics B
ISSN
0550-3213JCR Link
Citation
vol. 676, no. 3, pp. 637 - 658
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We compute the boundary energy and the Casimir energy for both the spin-1/2 XXZ quantum spin chain and (by means of the light-cone lattice construction) the massive sine-Gordon model with both left and right boundaries. We also derive a nonlinear integral equation for the ground state of the sine-Gordon model on a finite interval. These results, which are based on a recently-proposed Bethe ansatz solution, are for general values of the bulk coupling constant, and for both diagonal and nondiagonal boundary interactions. However, the boundary parameters are restricted to obey one complex (two real) constraints. © 2003 Elsevier B.V. All rights reserved.
DOI
10.1016/j.nuclphysb.2003.11.012
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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