Concept

Quantum turbulence

Related publications (103)

Comparison between fluid electron-temperature-gradient driven simulations and Tore Supra experiments on electron heat transport

In recent years, much attention has been devoted to the electron-temperature-gradient (ETG) driven instability as a possible explanation for the high electron thermal conductivity found in most tokamaks. The present contribution assesses whether a specific ...

2007

Towards thermal equilibrium in the Bose-Einstein condensation of microcavity polaritons

Vincenzo Savona, Davide Sarchi

By comparing a kinetic and a thermal-equilibrium theory of polariton Bose-Einstein condensation, we study under what conditions the dynamical condensation under steady-state non-resonant pumping can approach thermal equilibrium. In particular, we study the ...

2007

Na2V3O7: An unusual low-dimensional quantum magnet

Frédéric Mila

Results of present and previous measurements of the23Na NMR response, dc- and ac-magnetic susceptibilities and the specific heat ofNa2V3O7at low temperatures suggest that this material is close to a quantum critical point (QCP) atm0H¼0 T. The experimental ...

2006

Cavitation effects on fluid-structure interaction in the case of a 2D hydrofoil

Philippe Ausoni

In the present study, we have carried out an experimental investigation on the fluid-structure interaction caused by Karman vortices in the wake of a truncated 2D hydrofoil. The instrumentation involves a high frequency accelerometer and high speed visuali ...

2005

Photoluminescence spectra and level repulsion in quantum wires

Benoît Marie Joseph Deveaud, Vincenzo Savona, Andrea Crottini, Andrea Feltrin, Xiao Wang

Luminescence spectra of V-groove GaAs/AlGaAs quantum wires are investigated by spatially resolved photoluminescence (PL) spectroscopy using a low temperature scanning near-field optical microscope (SNOM). The statistical analysis of these spectra in terms ...

V C H PUBLISHERS, SUITE 909, 220 E 23RD ST, NEW YORK, NY 10010 USA2004

Vortex dynamics in two-dimensional Josephson junction arrays

The dynamic response of two-dimensional Josephson junction arrays close to, but above the Berezinskii-Kosterlitz-Thouless (BKT) transition temperature is described in terms of the vortex dielectric function ε(ω) and the flux noise spectrum S φ (ω). They ar ...

American Physical Society2003

Divertor detachment during pure helium plasmas in JET

Richard Pitts, Marco Wischmeier

A campaign of pure helium discharges in the JET tokamak equipped with the MarkIIGB divertor has been performed. This paper describes some of the experimental observations of divertor detachment obtained in L-mode density ramp He discharges and presents a s ...

2003

Superfluid and normal-fluid density in the cuprate superconductors

Giorgio Margaritondo, László Forró, Helmuth Berger

As carriers are introduced into the cuprates (by doping the insulating "parent" compounds) spectral weight appears in the optical spectrum at photon energies below the charge-transfer gap. This spectral weight increases as the doping level increases. Magne ...

2001

Superfluid and normal-fluid densities in the high-T-c superconductors

Giorgio Margaritondo, László Forró, Helmuth Berger

In clean metallic superconductors, 100% of the mobile carriers participate ill the condensate, so that the London penetration depth (which measures the electromagnetic screening by the superconductor) indicates charge densities comparable to those inferred ...

2000

ab-plane optical properties of Ni-doped Bi2Sr2CaCu2O8+delta

Giorgio Margaritondo, Helmuth Berger

The ab-plane optical reflectance of single crystal of Bi2Sr2Ca(Cu1-xNix)(2)O8+d, for x = 0.0215, has been measured from 80 to 40 000 cm(-l) (10 meV-5 eV) and at temperatures between 20 and 300 K. Through Ni substitution, the optical conductivity shows a br ...

1999

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