Domain walls at the spin density wave enpoint of the organic superconductor (TMTSF)_{2}PF_{6} under pressure
Kang, W., Salameh, B., Auban Senzier, P., Jerome, D., Pasquier, C.R., Brazovskii, S. Physical Review B81 (2010) 100509
Distribution of essential interactions in model gene regulatory networks under mutation-selection balance
Z. Burda 1, A. Krzywicki 2, O. C. Martin 3, 4, M. Zagorski 1 Physical Review E: Statistical, Nonlinear, and Soft Matter Physics 82 (2010) 011908 Gene regulatory networks typically have low in-degrees, whereby any given gene is regulated by few of the genes in the network. They also tend to have broad distributions for the out-degree. What mechanisms might be responsible for these
Disorder-driven quantum phase transitions in superconductors and magnets
Lev Ioffe 1, Marc Mezard 2 Physical Review Letters 105 (2010) 037001 We develop an analytical theory, based on the quantum cavity method, describing the quantum phase transitions in low-temperature, strongly disordered ferromagnets and superconductors. At variance with the usual quantum critical points, we find a phase diagram with two critical points separating three phases. When the disorder increases,
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Dimeric and dipolar ground state orders in colloidal molecular crystals
Trizac, E., El Shawish, S., Dobnikar, J. Anais da Academia Brasileira de Ciencias82 (2010) 87-94
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Decomposition of spectral density in individual eigenvalue contributions
O. Bohigas 1, M. P. Pato 1, 2 Journal of Physics A Mathematical and Theoretical 43 (2010) 365001 The eigenvalue densities of two random matrix ensembles, the Wigner Gaussian matrices and the Wishart covariant matrices, are decomposed in the contributions of each individual eigenvalue distribution. It is shown that the fluctuations of all eigenvalues, for medium matrix sizes, are described
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Critical interfaces of the Ashkin-Teller model at the parafermionic point
Picco, M., Santachiara, R. Journal of Statistical Mechanics(2010) P07027
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Critical interface: twisting spin glasses at $T_c$
E. Brézin 1, S. Franz 2, G. Parisi 3, 4 Physical Review B 82 (2010) 144427 We consider identical copies of spin glasses in finite dimension coupled at the boundaries. This allows to identify the spin glass analogous of twisted boundary conditions in ferromagnetic system and leads to the definition of an interface free-energy that is positively defined and that should scale
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Constraints on stable equilibria with fluctuation-induced forces
Sahand Jamal Rahi 1, Mehran Kardar 1, Thorsten Emig 2, 3 Physical Review Letters 105 (2010) 070404 We examine whether fluctuation-induced forces can lead to stable levitation. First, we analyze a collection of classical objects at finite temperature that contain fixed and mobile charges, and show that any arrangement in space is unstable to small perturbations in position. This extends Earnshaw’s theorem
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Condensation Transition in Polydisperse Hard Rods
M. R. Evans 1, S. N. Majumdar 2, I. Pagonabarraga 3, E. Trizac 2 The Journal of Chemical Physics 132 (2010) 014102 We study a mass transport model, where spherical particles diffusing on a ring can stochastically exchange volume $v$, with the constraint of a fixed total volume $V=\sum_{i=1}^N v_i$, $N$ being the total number of particles. The particles, referred to as $p$-spheres,
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Coherent dynamics of macroscopic electronic order through a symmetry-breaking transition
R. Yusupov 1, T. Mertelj 1, V. V. Kabanov 1, S. Brazovskii 2, P. Kusar 1, J. -H. Chu 3, I. R. Fisher 3, D. Mihailovic 1 Nature Physics 6 (2010) 681-684 The temporal evolution of systems undergoing symmetry breaking phase transitions (SBTs) is of great fundamental interest not only in condensed matter physics, but extends from cosmology to brain function and finance \cite{topology,Kibble,Eltsov,Finance}. However, the study of such transitions is