Anomalous diffusion in random media of any dimensionality (2008)
Bouchaud, J.P., Comtet, A., Georges, A., Le Doussal, P.
We show, through physical arguments and a renormalization group analysis, that in the presence of long-range correlated random forces, diffusions is anomalous in any dimension. We obtain in general...
Anomalous diffusion in random media of any dimensionality (2008)
Bouchaud, J.P., Comtet, A., Georges, A., Le Doussal, P.
We show, through physical arguments and a renormalization group analysis, that in the presence of long-range correlated random forces, diffusions is anomalous in any dimension. We obtain in general...
Anomalous diffusion in random media of any dimensionality (2008)
Bouchaud, J.P., Comtet, A., Georges, A., Le Doussal, P.
We show, through physical arguments and a renormalization group analysis, that in the presence of long-range correlated random forces, diffusions is anomalous in any dimension. We obtain in general...
Lechenault, F., Dauchot, O., Biroli, G., Bouchaud, J. P.
We track the motion of a horizontally vibrated amorphous assembly of bidisperse hard disks, for densities ranging across the jamming transition. We derive on very general grounds a bound on the...
Bonville, P., Hodges, J. A., Bertin, E., Bouchaud, J. P., De Reotier, P. D., Regnault, L. P., ...
The very low temperature properties of two pyrochlore compounds, Yb2Ti2O7 and Gd2Sn2O7, were investigated using an ensemble of microscopic and bulk techniques. In both compounds, a first order...
Financial Applications of Random Matrix Theory: Old Laces and New Pieces (2005)
Potters, M., Bouchaud, J. P., Laloux, L.
This contribution to the proceedings of the Cracow meeting on `Applications of Random Matrix Theory' summarizes a series of studies, some old and others more recent on financial applications of...
Are defect models consistent with the entropy and specific heat of glass-formers? (2004)
Biroli, G., Bouchaud, J. P., Tarjus, G.
We show that point-like defect model of glasses cannot explain thermodynamic properties of glass-formers, as for example the excess specific heat close to the glass transition, contrary to the claim...
A Non-Gaussian Option Pricing Model with Skew (2004)
Closed form option pricing formulae explaining skew and smile are obtained within a parsimonious non-Gaussian framework. We extend the non-Gaussian option pricing model of L. Borland (Quantitative...
Transition and spin dynamics at very low temperature in the pyrochlores Yb2Ti2O7 and Gd2Sn2O7 (2003)
Bonville, P., Hodges, J. A., Bertin, E., Bouchaud, J. P., Ocio, M., De Reotier, P. Dalmas, ...
The very low temperature properties of two pyrochlore compounds, Yb2Ti2O7 and Gd2Sn2O7, were investigated using an ensemble of microscopic and bulk techniques. In both compounds, a first order...
Multi-scale clustering in granular surface flows (2001)
Bonamy, D., Daviaud, F., Laurent, L., Bonetti, M., Bouchaud, J. P.
We investigate steady granular surface flows in a rotating drum and demonstrate the existence of rigid clusters of grains embedded in the flowing layer. These clusters are fractal and their size is...
Frequency Dependence of Aging, Rejuvenation and Memory in a disordered ferroelectric (2000)
Bouchaud, J. P., Doussineau, P., Levelut, A.
We characterize in details the aging properties of the ferroelectric phase of K Ta_{1-x} Nb_x O_3 (KTN), where both rejuvenation and (partial) memory are observed. In particular, we carefully examine...
Hedging Large Risks Reduces the Transaction Costs (2000)
As soon as one accepts to abandon the zero-risk paradigm of BlackScholes, very interesting issues concerning risk control arise because different definitions of the risk become unequivalent. Optimal...
Taming Large Events: Optimal Portfolio Theory For Strongly Fluctuating Assets (1999)
J. P. Bouchaud, D. Sornette, C. Walter, J. P. Aguilar
This paper is not claiming mathematical rigour, but rather discusses these topics in an intuitive, and hopefully useful, manner.
Memory interference effects in spin glasses (1999)
Jonason, K., Nordblad, P., Vincent, E., Hammann, J., Bouchaud, J. P.
When a spin glass is cooled down, a memory of the cooling process is imprinted in the spin structure. This memory can be disclosed in a continuous heating measurement of the ac-susceptibility. E.g.,...
Memory and Chaos Effects in Spin Glasses (1998)
Jonason, K., Vincent, E., Hammann, J., Bouchaud, J. P., Nordblad, P.
New low frequency ac susceptibility measurements on two different spin glasses show that cooling/heating the sample at a constant rate yields an essentially reversible (but rate dependent) X(T)...
Generalized persistence exponents: an exactly soluble model (1998)
Baldassarri, A., Bouchaud, J. P., Dornic, I., Godrèche, C.
It was recently realized that the persistence exponent appearing in the dynamics of nonequilibrium systems is a special member of a continuously varying family of exponents, describing generalized...
Development of Stresses in Cohesionless Poured Sand (1998)
Cates, M. E., Wittmer, J., Bouchaud, J. P., Claudin, P.
The pressure distribution beneath a conical sandpile, created by pouring sand from a point source onto a rough rigid support, shows a pronounced minimum below the apex (`the dip'). Recent work of the...
Jamming, Force Chains and Fragile Matter (1998)
Cates, M. E., Wittmer, J., Bouchaud, J. P., Claudin, P.
We consider materials whose mechanical integrity is the result of a jamming process. We argue that such media are generically "fragile": unable to support certain types of incremental loading without...
Peierls instability of vortex tubes (1997)
Using results of Goldstone and Jaffe, we discuss the possibility of a low temperature instability of vortex tubes to a `folded' state, driven by the coupling to the normal electron states inside the...
Universality Classes for Extreme Value Statistics (1997)
The low temperature physics of disordered systems is governed by the statistics of extremely low energy states. It is thus rather important to discuss the possible universality classes for extreme...
Scaling And Intermittency In Burgers' Turbulence (1995)
: We use the mapping between Burgers' equation and the problem of a directed polymer in a random medium in order to study the fully developped turbulence in the N dimensional forced Burgers'...
SCALING AND INTERMITTENCY IN BURGERS' TURBULENCE (1995)
Bouchaud, J. P., Mezard, M., Parisi, G.
We use the mapping between Burgers' equation and the problem of a directed polymer in a random medium in order to study the fully developped turbulence in the $N$ dimensional forced Burgers'...
Self Induced Quenched Disorder: A Model for the Glass Transition (1994)
We consider a simple spin system without disorder which exhibits a glassy regime. We show that this model can be well approximated by a system with quenched disorder which is studied with the...
Towards an experimental measure of the number of metastable states in spin-glasses ? (1993)
Bouchaud, J. P., Vincent, E., Hammann, J.
We show that an 'ergodic' time scale can be extracted from the aging experiments on spin-glasses. This is the time for which a significant fraction of the metastable states have been visited....
Erratum - Anomalous diffusion in random media of any dimensionality (1988)
Bouchaud, J.P., Comtet, A., Georges, A., Le Doussal, P.
No abstract available
Pair wave functions for strongly correlated fermions and their determinantal representation (1988)
Bouchaud, J.P., Georges, A., Lhuillier, C.
We show that a (Jastrow projected or not) BCS wave function with any fixed number of fermions can be represented as a determinant. This is important for their numerical investigation, with...
Erratum - Anomalous diffusion in random media of any dimensionality (1988)
Bouchaud, J.P., Comtet, A., Georges, A., Le Doussal, P.
No abstract available
Pair wave functions for strongly correlated fermions and their determinantal representation (1988)
Bouchaud, J.P., Georges, A., Lhuillier, C.
We show that a (Jastrow projected or not) BCS wave function with any fixed number of fermions can be represented as a determinant. This is important for their numerical investigation, with...
Erratum - Anomalous diffusion in random media of any dimensionality (1988)
Bouchaud, J.P., Comtet, A., Georges, A., Le Doussal, P.
No abstract available
Pair wave functions for strongly correlated fermions and their determinantal representation (1988)
Bouchaud, J.P., Georges, A., Lhuillier, C.
We show that a (Jastrow projected or not) BCS wave function with any fixed number of fermions can be represented as a determinant. This is important for their numerical investigation, with...
Anomalous diffusion in random media of any dimensionality (1987)
Bouchaud, J.P., Comtet, A., Georges, A., Le Doussal, P.
We show, through physical arguments and a renormalization group analysis, that in the presence of long-range correlated random forces, diffusions is anomalous in any dimension. We obtain in general...
Errata - Longitudinal electronic and nuclear spin difference in atomic hydrogen (1986)
No abstract available
Rigorous bounds for 2D disordered ising models (1986)
Georges, A., Hansel, D., Le Doussal, P., Maillard, J.M., Bouchaud, J.P.
A method systematically improving the annealed bounds (for the free energy and the ground state energy) is presented and illustrated by the example of disordered Ising models. An optimization...
Errata - Longitudinal electronic and nuclear spin difference in atomic hydrogen (1986)
No abstract available
Rigorous bounds for 2D disordered ising models (1986)
Georges, A., Hansel, D., Le Doussal, P., Maillard, J.M., Bouchaud, J.P.
A method systematically improving the annealed bounds (for the free energy and the ground state energy) is presented and illustrated by the example of disordered Ising models. An optimization...
Errata - Longitudinal electronic and nuclear spin difference in atomic hydrogen (1986)
No abstract available
Rigorous bounds for 2D disordered ising models (1986)
Georges, A., Hansel, D., Le Doussal, P., Maillard, J.M., Bouchaud, J.P.
A method systematically improving the annealed bounds (for the free energy and the ground state energy) is presented and illustrated by the example of disordered Ising models. An optimization...
Longitudinal electronic and nuclear spin diffusion in atomic hydrogen (1985)
The general results recently obtained for the Boltzmann collision term in a gas of atomic hydrogen are applied to the study of longitudinal spin diffusion in high magnetic fields. This phenomenon can...
Longitudinal electronic and nuclear spin diffusion in atomic hydrogen (1985)
The general results recently obtained for the Boltzmann collision term in a gas of atomic hydrogen are applied to the study of longitudinal spin diffusion in high magnetic fields. This phenomenon can...
Longitudinal electronic and nuclear spin diffusion in atomic hydrogen (1985)
The general results recently obtained for the Boltzmann collision term in a gas of atomic hydrogen are applied to the study of longitudinal spin diffusion in high magnetic fields. This phenomenon can...