Condensed Matter Theory

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Splitting the multiphase point

PHASE TRANSIT 57:1-3 (1996) 49-58

Abstract:

Models with competing interactions, for example the ANNNI model, can have special points at which the ground state is infinitely degenerate, so-called multiphase points. Small perturbations can lift this degeneracy and give rise to infinite sequences of long-period phases. This paper compares the effect of three possible perturbations, quantum fluctuations, thermal fluctuations and the softening of the spins from their quantised positions.
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The supersymmetric t-J model with a boundary

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL 29:19 (1996) 6183-6203
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Determinant representation for a quantum correlation function of the lattice sine-Gordon model

(1995)

Authors:

Fabian HL Essler, Holger Frahm, Alexander R Its, Vladimir E Korepin
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Exact Perturbative Solution of the Kondo Problem

Physical Review Letters American Physical Society (APS) 75:24 (1995) 4492-4495

Authors:

P Fendley, H Saleur
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A test theory of the local structure of spacetime: a Finslerian approach

Classical and Quantum Gravity 12:1 (1995) 273-278

Authors:

R Golestanian, MRH Khajehpour, R Mansouri

Abstract:

For rival theories within the framework of the test theory of Mansouri - Sexl a geometrical setting in terms of Finsler geometry has been found. It is shown that the time dilation and length contraction parameters measure the deviation from a Riemannian geometry.
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