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- M Moliner, D C Cabra, A Honecker, P Pujol, F Stauffer
- 2009

We investigated the classical Shastry-Sutherland lattice under an external magnetic field in order to understand the recently discovered magnetization plateaux in the rare-earth tetraborides compounds RB4. A detailed study of the role of thermal fluctuations was carried out by mean of classical spin waves theory and Monte-Carlo simulations. Magnetization… (More)

Quantum Hamiltonians that are fine-tuned to their so-called Rokhsar-Kivelson (RK) points, first presented in the context of quantum dimer models, are defined by their representations in preferred bases in which their ground state wave functions are intimately related to the partition functions of combinatorial problems of classical statistical physics. We… (More)

We study the long wavelength limit of a spin S Heisenberg antiferromagnetic chain. The fermionic Lagrangian obtained corresponds to a perturbed level 2S SU (2) Wess-Zumino-Witten model. This effective theory is then mapped into a compact U (1) boson interacting with Z 2S parafermions. The analysis of this effective theory allows us to show that when S is an… (More)

- D C Cabra, A Honecker, P Pujol
- 1998

In this paper we continue and extend our earlier study [15] of plateaux in magne-tization curves of antiferromagnetic Heisenberg spin-1/2 ladders. We first review a bosonic field-theoretical formulation of a single XXZ-chain in the presence of a magnetic field, which is then used for an Abelian bosonization analysis of N weakly coupled chains. Predictions… (More)

- A Honecker, M Picco, P Pujol
- Physical review letters
- 2001

We study the universality class of the Nishimori point in the 2D +/- J random-bond Ising model by means of the numerical transfer-matrix method. Using the domain-wall free energy, we locate the position of the fixed point along the Nishimori line at the critical concentration value p(c) = 0.1094 +/- 0.0002 and estimate nu = 1.33 +/- 0.03. Then, we obtain… (More)

- Pierre Pujol
- 1995

We study the spin-spin and energy-energy correlation functions for the 2D Ising and 3-states Potts model with random bonds at the critical point. The procedure employed is the renormalisation group approach of the perturbation series around the conformal field theories representing the pure models. For the Ising model, we obtain a crossover in the amplitude… (More)

- David Carpentier, Pierre Pujol, Kay-Uwe Giering
- Physical review. E, Statistical, nonlinear, and…
- 2005

In this paper we discuss the criticality of a quantum Ising spin chain with competing random ferromagnetic and antiferromagnetic couplings. Quantum fluctuations are introduced via random local transverse fields. First we consider the chain with couplings between first and second neighbors only and then generalize the study to a quantum analog of the… (More)

- C A Lamas, A Ralko, D C Cabra, D Poilblanc, P Pujol
- Physical review letters
- 2012

We prove a "statistical transmutation" symmetry of doped quantum dimer models on the square, triangular, and kagome lattices: the energy spectrum is invariant under a simultaneous change of statistics (i.e., bosonic into fermionic or vice versa) of the holes and of the signs of all the dimer resonance loops. This exact transformation enables us to define… (More)

- D Charrier, F Alet, P Pujol
- Physical review letters
- 2008

We study a phase transition in a 3D lattice gauge theory, a "coarse-grained" version of a classical dimer model. Duality arguments indicate that the dimer lattice theory should be dual to a XY model coupled to a gauge field with geometric frustration. The transition between a Coulomb phase with dipolar correlations and a long range ordered columnar phase is… (More)

- Pierre Pujol
- L' Orthodontie française
- 2014

The use of customized combination mechanics with two auxillaries such as mini screws and Forsus(TM) Springs that up to now have been used independently, achieved unexpected results in the correction of a non-surgical skeletal Class II malocclusion. The use of mini implants to control the canting of the occlusal plane that is frequently reported during the… (More)