Zobrazeno 1 - 10
of 90
pro vyhledávání: '"Temesvari, T."'
Autor:
Temesvari, T.
Publikováno v:
Nuclear Physics B, Volume 772, Issue 3, 18 June 2007, Pages 340-370
A new powerful method to test the stability of the replica symmetric spin glass phase is proposed by introducing a replicon generator function g(v). Exact symmetry arguments are used to prove that its extremum is proportional to the inverse spin glas
Externí odkaz:
http://arxiv.org/abs/cond-mat/0612523
Autor:
Temesvari, T.
Publikováno v:
J.Phys. A: Math. Gen. 39 (2006) L61-L67
Symmetry arguments are used to derive a set of exact identities between irreducible vertex functions for the replica symmetric field theory of the Ising spin glass in zero magnetic field. Their range of applicability spans from mean field to short ra
Externí odkaz:
http://arxiv.org/abs/cond-mat/0510209
Publikováno v:
Eur. Phys. J. B 33, 203-207 (2003)
We consider the spin-glass phase of the Sherrington-Kirkpatrick model in the presence of a magnetic field. The series expansion of the Parisi function $q(x)$ is computed at high orders in powers of $\tau=T_c-T$ and $H$. We find that none of the Paris
Externí odkaz:
http://arxiv.org/abs/cond-mat/0302538
Autor:
Temesvari, T., De Dominicis, C.
Publikováno v:
Phys.Rev.Lett. 89, 097204 (2002)
We use the generic replica symmetric cubic field-theory to study the transition of short range Ising spin glasses in a magnetic field around the upper critical dimension, d=6. A novel fixed-point is found, in addition to the well-known zero magnetic
Externí odkaz:
http://arxiv.org/abs/cond-mat/0207512
Publikováno v:
Phys. Rev. B 65, 224420 (2002)
We study the transition of short range Ising spin glasses in a magnetic field, within a general replica symmetric field theory, which contains three masses and eight cubic couplings, that is defined in terms of the fields representing the replicon, a
Externí odkaz:
http://arxiv.org/abs/cond-mat/0204615
Publikováno v:
Eur. Phys. J. B 25, 361-372 (2002)
Symmetry considerations and a direct, Hubbard-Stratonovich type, derivation are used to construct a replica field-theory relevant to the study of the spin glass transition of short range models in a magnetic field. A mean-field treatment reveals that
Externí odkaz:
http://arxiv.org/abs/cond-mat/0202162
Publikováno v:
Eur.Phys.J.B 18, 493-500 (2000)
The reparametrization transformation between ultrametrically organised states of replicated disordered systems is explicitly defined. The invariance of the longitudinal free energy under this transformation, i.e. reparametrization invariance, is show
Externí odkaz:
http://arxiv.org/abs/cond-mat/0007340
Publikováno v:
Eur.Phys.J.B 11, 629-634 (1999)
Replica field theory for the Ising spin glass in zero magnetic field is studied around the upper critical dimension d=6. A scaling theory of the spin glass phase, based on Parisi's ultrametrically organised order parameter, is proposed. We argue that
Externí odkaz:
http://arxiv.org/abs/cond-mat/9812034
The introduction of ``small permutations'' allows us to derive Ward-Takahashi identities for the spin-glass, in the Parisi limit of an infinite number of steps of replica symmetry breaking. The first identities express the emergence of a band of Gold
Externí odkaz:
http://arxiv.org/abs/cond-mat/9802166
Publikováno v:
J. Phys. I France 7 (1997) 105-115
The analysis of objects living on ultrametric trees, in particular the block-diagonalization of 4-replica matrices $M^{\alpha \beta ; \gamma \delta}$, is shown to be dramatically simplified through the introduction of properly chosen operations on th
Externí odkaz:
http://arxiv.org/abs/cond-mat/9703132