publications

Christophe Texier 1, 2, Pascal Degiovanni 3 Journal of Physics A 36 (2003) 12425-12452 We consider graphs made of one-dimensional wires connected at vertices, and on which may live a scalar potential. We are interested in a scattering situation where such a network is connected to infinite leads. We study the correlations of the charge in such graphs out of […]

Alain Comtet 1, 2, Jean Desbois 1 Journal of Physics A 36 (2003) L255-L262 We consider a planar Brownian motion starting from $O$ at time $t=0$ and stopped at $t=1$ and a set $F= \{OI_i ; i=1,2,…, n\}$ of $n$ semi-infinite straight lines emanating from $O$. Denoting by $g$ the last time when $F$ is reached by the Brownian motion,

Bogomolny, E., Schmit, C. Nonlinearity 16 (2003) 2035-2059

Marc Mézard 1, Federico Ricci-Tersenghi 2, Riccardo Zecchina 3 Journal of Statistical Physics 111 (2003) 505-533 We derive analytical solutions for p-spin models with finite connectivity at zero temperature. These models are the statistical mechanics equivalent of p-XORSAT problems in theoretical computer science. We give a full characterization of the phase diagram: location of the phase transitions (static and dynamic), together

Vladimir S. Dotsenko 1, Jesper-Lykke Jacobsen 2, Xuan Son Nguyen 1, Raoul Santachiara 1 Nuclear Physics B 631 (2002) 426-446 We study systems of M Potts models coupled by their local energy density. Each model is taken to have a distinct number of states, and the permutational symmetry S_M present in the case of identical coupled models is thus broken initially. The duality transformations

Patricio Leboeuf 1, Alejandro Monastra 1 Annals of Physics 297 (2002) 127-156 We investigate the probability distribution of the quantum fluctuations of thermodynamic functions of finite, ballistic, phase-coherent Fermi gases. Depending on the chaotic or integrable nature of the underlying classical dynamics, on the thermodynamic function considered, and on temperature, we find that the probability distributions are dominated either

Serguei Brazovskii 1 Journal de Physique IV Colloque 12 (2002) 149 Recently the ferroelectric anomaly (Nad, Monceau, et al) followed by the charge disproportionation (Brown, et al) have been discovered in (TMTTF)2X compounds. The corresponding theory of the combined Mott-Hubbard state describes both effects by interference of the build-in nonequivalence of bonds and the spontaneous one of

Serguei Matveenko 1, Serguei Brazovskii 2 Journal de Physique IV Colloque 12 (2002) 73 For a one-dimensional electron-phonon system we consider the photon absorption involving electronic excitations within the pseudogap energy range. In the framework of the adiabatic approximation for the electron – phonon interactions these processes are described by nonlinear configurations of an instanton type. We calculate the

Markus Muller 1, Florent Krzakala 1, Marc Mézard 1 European Physical Journal E 9 (2002) 67-77 We study the force-induced unfolding of random disordered RNA or single-stranded DNA polymers. The system undergoes a second order phase transition from a collapsed globular phase at low forces to an extensive necklace phase with a macroscopic end-to-end distance at high forces. At low temperatures,

Marc Mézard 1, Riccardo Zecchina 2 Physical Review E: Statistical, Nonlinear, and Soft Matter Physics 66 (2002) 056126 We study the problem of satisfiability of randomly chosen clauses, each with K Boolean variables. Using the cavity method at zero temperature, we find the phase diagram for the K=3 case. We show the existence of an intermediate phase in the