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The universality of the Tracy-Widom distribution could originate from a phase transition

Physicists from our lab have recently proposed a mechanism explaining the emergence of the Tracy-Widom distribution in a wide variety of problems in physics and mathematics. They showed that this distribution is associated to the critical behavior of a system of interacting particles, in the vicinity of a third order phase transition. The universality of

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The fate of quantum wavefunction multifractality under perturbation

Ref. : R. Dubertrand, I. García-Mata, B. Georgeot, O. Giraud, G. Lemarié, and J. Martin, Two scenarios for quantum multifractality breakdown, Phys. Rev. Lett. 112, 234101 (2014). The concept of fractal geometry was introduced by Mandelbrot in the seventies, to describe a range of phenomena characterized by the fact that a certain quantity has a

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Evolution of a complex electronic system to an ordered hidden state: optical quench in TaS2 – theory versus experiment

Contact: S. Brazovskii, brazov@lptms.u-psud.fr http://lptms.u-psud.fr/membres/brazov/ Femto-second optical techniques addressing pump-induced phase transitions (PIPT) put an ambitious goal to reach “hidden” states of matter – those which are not accessible and not known under equilibrium conditions or more conventional treatments. While there was a case of success in magnetic materials, there has been no success yet

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New solutions to the Boltzmann equation

D. Guéry-Odelin, J. G. Muga, M.J. Ruiz- Montero and E. Trizac, Exact non-equilibrium solutions of the Boltzmann equation under a time-dependent external force, Physical Review Letters 112, 180602 (2014) In 1872, Boltzmann established a key bridge between microscopic dynamics and macroscopic irreversibility, through the H theorem: a dilute gas thereby evolves towards equilibrium, where it

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G. Shlyapnikov awarded a 2013 ERC « Advanced Grant »

Georgy Shlyapnikov, Directeur de recherche CNRS at LPTMS, has been awarded an ERC Advanced Grant 2013 for his project on « New collective phases in quantum gases: from few-body to N-body physics ». The ERC Advanced Research Grants are awarded to « exceptional leaders in terms of originality and significance of their research contributions ». Their aim is to

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After 20 years the concept of ‘fractal globule’ is experimentally verified in genomics

In the paper “Comprehensive Mapping of Long-Range Interactions Reveals Folding Principles of the Human Genome” (Science 326, 289 (2009)), a team of US authors has reported the existence of a new structural organization of a DNA chain in the human genome in the form of a « fractal globule ». This first direct experimental observation of the

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