Zobrazeno 1 - 10
of 624
pro vyhledávání: '"Hove, J."'
Publikováno v:
Phys Rev Lett, 97, 247201 (2006)
Quantum phase transitions in Mott insulators do not fit easily into the Landau-Ginzburg-Wilson paradigm. A recently proposed alternative to it is the so called deconfined quantum criticality scenario, providing a new paradigm for quantum phase transi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0609336
Publikováno v:
Phys. Rev. B 74, 104507 (2006)
The geometric properties of critical fluctuations in the 3D XY model are analyzed. The 3D XY model is a lattice model describing superfluids. We present a direct evaluation of the Hausdorff dimension D_H of the vortex loops which are the critical flu
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607830
Publikováno v:
PRB 75, 104405 (2007)
We have considered the $S=1/2$ antiferromagnetic Heisenberg model in two dimensions, with an additional Ising \nnn interaction. Antiferromagnetic \nnn interactions will lead to frustration, and the system responds with flipping the spins down in the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0605118
Publikováno v:
Phys. Rev. Lett. 96, 219702 (2006)
A short Reply to the Comment of Prokof'ev and Svistunov, cond-mat/0504008, is given.
Externí odkaz:
http://arxiv.org/abs/cond-mat/0506023
Autor:
Hove, J.
Publikováno v:
J. Phys. A, Math. Gen. 38 (2005) 10893-10904
Due to Fortuin and Kastelyin the $q$ state Potts model has a representation as a sum over random graphs, generalizing the Potts model to arbitrary $q$ is based on this representation. A key element of the Random Cluster representation is the combinat
Externí odkaz:
http://arxiv.org/abs/cond-mat/0503049
Autor:
Hove, J.
We describe method for calculating the density of states by combining several canonical monte carlo runs. We discuss how critical properties reveal themselves in $g(\epsilon)$ and demonstrate this by applying the method several different phase transi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0401482
Publikováno v:
Phys.Rev.E68:046107,2003
Using Monte Carlo simulations we have studied the $d=3$ $Z_q$ clock model in two different representations, the phase-representation and the loop/dumbbell-gas (LDG) representation. We find that for $q \ge 5$ the critical exponents $\alpha$ and $\nu$
Externí odkaz:
http://arxiv.org/abs/cond-mat/0301499
Publikováno v:
Phys.Rev. B67 (2003) 205104
Large-scale Monte Carlo simulations are employed to study phase transitions in the three-dimensional compact abelian Higgs model in adjoint representations of the matter field, labelled by an integer q, for q=2,3,4,5. We also study various limiting c
Externí odkaz:
http://arxiv.org/abs/cond-mat/0301297
Paper has been withdrawn, see comment.
Comment: Paper has been withdrawn; see cond-mat/0301499
Comment: Paper has been withdrawn; see cond-mat/0301499
Externí odkaz:
http://arxiv.org/abs/cond-mat/0212255
Publikováno v:
Phys.Rev.Lett. 89 (2002) 226403
We use a novel method of computing the third moment M_3 of the action of the 2+1-dimensional compact Higgs model in the adjoint representation with q=2 to extract correlation length and specific heat exponents nu and alpha, without invoking hyperscal
Externí odkaz:
http://arxiv.org/abs/cond-mat/0207501