publications

Abdelâali Boudjemaâ 1, G. V. Shlyapnikov 2 Physical Review A 87 (2013) 025601 We discuss fluctuations in a dilute two-dimensional Bose-condensed dipolar gas, which has a roton-maxon character of the excitation spectrum. We calculate the density-density correlation function, fluctuation corrections to the chemical potential, compressibility, and the normal (superfluid) fraction. It is shown that the presence of the roton […]

O. Bohigas 1 and M. P. Pato 2 J. Phys. A: Math. Theor. 46 (2013) 115001 (11pp) The transition between Hermitian and non-Hermitian matrices of the Gaussian unitary ensemble is revisited. An expression for the kernel of the rescaled Hermite polynomials is derived which expresses the sum in terms of the highest order polynomials. From

P. Deuar 1, T. Wasak 2, P. Zin 3, 4, J. Chwedenczuk 2, M. Trippenbach 2, 3 Physical Review A 88 (2013) 013617 We investigate the factors that influence the usefulness of supersonic collisions of Bose-Einstein condensates as a potential source of entangled atomic pairs by analyzing the reduction of the number difference fluctuations between regions of opposite momenta. We show that non-monochromaticity of the mother clouds

Todd Thoresen 1 Martin Lenz 2, 1, 3 Margaret Gardel 1, 3 Biophysical Journal, Biophysical Society, 2013, 104, pp.655-665. <10.1016/j.bpj.2012.12.042> Diverse myosin II isoforms regulate contractility of actomyosin bundles in disparate physiological processes by variations in both motor mechanochemistry and the extent to which motors are clustered into thick filaments. Although the role of mechanochemistry

A. Comtet 1, 2, J. M. Luck 3, C. Texier 1, 4, Y. Tourigny 5 Journal of Statistical Physics 150 (2013) 13-65 We study products of arbitrary random real $2 \times 2$ matrices that are close to the identity matrix. Using the Iwasawa decomposition of $\text{SL}(2,{\mathbb R})$, we identify a continuum regime where the mean values and the covariances of the three Iwasawa parameters are

Sergio Rodriguez-Perez 1, Ricardo Marino 2, Marcel Novaes 1, Pierpaolo Vivo 2 Physical Review E 88 (2013) 052912 We consider statistics of electronic transport in chaotic cavities where time-reversal symmetry is broken and one of the leads is weakly non-ideal, i.e. it contains tunnel barriers characterized by tunneling probabilities $\Gamma_i$. Using symmetric function expansions and a generalized Selberg integral, we develop a systematic

Olga Valba 1 Université Paris Sud – Paris XI (15/10/2013), Sergeï Nechaev (Dir.) Complex organization is found in many biological systems. For example, biopolymers could possess very hierarchic structure, which provides their functional peculiarity. Understating such, complex organization allows describing biological phenomena and predicting molecule functions. Besides, we can try to characterize the specific phenomenon by some

Silvio Franz 1, Hugo Jacquin 2, Giorgio Parisi 3, Pierfrancesco Urbani 1, Francesco Zamponi 4 Journal of Chemical Physics 138 (2013) 12A540 We discuss the slow relaxation phenomenon in glassy systems by means of replicas by constructing a static field theory approach to the problem. At the mean field level we study how criticality in the four point correlation functions arises because of the presence

Gesualdo Delfino 1 Marco Picco 2 Raoul Santachiara 3 Jacopo Viti 4 Journal of Statistical Mechanics: Theory and Experiment, IOP Science, 2013, pp.P11011. <10.1088/1742-5468/2013/11/P11011> We study numerically the fractal dimensions and the bulk three-point connectivity for the spin clusters of the Q-state Potts model in two dimensions with $1\leq Q\leq 4$. We check that the

Eric Dumonteil 1, Satya N. Majumdar 2, Alberto Rosso 2, Andrea Zoia 1 Proceedings of the National Academy of Sciences 110 (2013) 4239-4244 Characterizing the spatial extent of epidemics at the outbreak stage is key to controlling the evolution of the disease. At the outbreak, the number of infected individuals is typically small, so that fluctuations around their average are important: then, it