Papers by Philippe Jacquod
AIP Conference Proceedings
Bookmarks Related papers MentionsView impact
Phys Rev a, 2010
Motivated by atomic optics experiments, we investigate a class of fidelity functions describing t... more Motivated by atomic optics experiments, we investigate a class of fidelity functions describing the reconstruction of quantum states by time-reversal operations as M{sub Da}(t)=|<|e{sup iH}{sup t/2}e{sup iH}{sup t/2}e{sup -iH}{sup t/2}e{sup -iH}{sup t/2}|>|². We show that the decay of M{sub Da} is quartic in time at short times and that it freezes well above the ergodic value at long times, when
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Phys Rev Lett, 2004
Bookmarks Related papers MentionsView impact
Phys Rev B, 2001
We calculate the Josephson coupling energy $U_J(\phi)$ (related to the supercurrent $I=(2e/\hbar)... more We calculate the Josephson coupling energy $U_J(\phi)$ (related to the supercurrent $I=(2e/\hbar) dU_J/d\phi$) for a disordered normal metal between two superconductors with a phase difference $\phi$. We demonstrate that the symmetry of the scattering matrix of non-interacting quasiparticles in zero magnetic field implies that $U_J(\phi)$ has a minimum at $\phi=0$. A maximum (that would lead to a $\pi$-junction or negative superfluid density) is excluded for any realization of the disorder.
Bookmarks Related papers MentionsView impact
Physical Review B, 2001
Bookmarks Related papers MentionsView impact
Physical Review B, 2000
Bookmarks Related papers MentionsView impact
Physical Review B, 2001
Bookmarks Related papers MentionsView impact
physica status solidi (b), 1998
ABSTRACT
Bookmarks Related papers MentionsView impact
ABSTRACT
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
We present a calculation of the electrically induced spin accumulation in mesoscopic systems in p... more We present a calculation of the electrically induced spin accumulation in mesoscopic systems in presence of both Rashba (with strength alpha) and Dresselhaus (with strength beta)spin-orbit interactions. For diffusive systems, we follow a diffusion equation approach to show that magnetoelectric effects disappear and that there is thus no spin accumulation when alpha=±beta. We show however that the singularity is broadened and that the suppression of spin accumulation becomes physically relevant (i) in finite-sized systems, (ii) in the presence of a cubic Dresselhaus interaction, or (iii) for finite frequency measurements. For ballistic systems, we present a novel scattering approach to (global) spin accumulation where charge and spin-dependent chemical potentials are extracted by an external probe. In this way the total spin accumulation, including its average and mesoscopic fluctuations, as well as its correlations with spin currents can be calculated from the statistics of transmis...
Bookmarks Related papers MentionsView impact
We construct a scattering theory of weakly nonlinear thermoelectric transport through mesoscopic ... more We construct a scattering theory of weakly nonlinear thermoelectric transport through mesoscopic conductors. To preserve gauge invariance interaction induced potentials within the conductor must be self-consistently determined. We describe how to do this and apply our theory to calculating the leading nonlinear contribution to both electrical and heat currents. We present sum rules for our nonlinear response coefficients that must hold for current conservation and gauge invariance to be satisfied. We illustrate the method by investigating the thermoelectric response of a quantum point contact and a resonant tunneling barrier.
Bookmarks Related papers MentionsView impact
A number of theoretical investigations show that spin currents can be magneto-electrically genera... more A number of theoretical investigations show that spin currents can be magneto-electrically generated by passing electric currents through spin-orbit coupled quantum dots. Measuring these currents has however not been achieved to date. In this talk, we present a theoretical proposal for measuring such mesoscopic spin currents with a voltage probe connected to the quantum dot via a single channel quantum
Bookmarks Related papers MentionsView impact
Physical Review B, 1997
Bookmarks Related papers MentionsView impact
Physical Review E, 2001
Bookmarks Related papers MentionsView impact
When electrons are added to a quantum dot in the Coulomb blockade regime, the effective single-pa... more When electrons are added to a quantum dot in the Coulomb blockade regime, the effective single-particle wave functions and energies change, a phenomenon known in the statistical regime as electron scrambling. We have investigated the effect of electron-electron interactions on scrambling using the self-consistent Hartree-Fock approximation for both diffusive and ballistic dots. We have studied the dependence of the scrambling rate on the physical parameters of the dot for various boundary conditions. In particular, hard-wall boundary conditions allow the accumulation of surface charges that lead to increased fluctuations and faster scrambling. We discuss the significance of these results for Coulomb blockade tunneling experiments.
Bookmarks Related papers MentionsView impact
Physical Review Letters, 2002
Bookmarks Related papers MentionsView impact
Physical Review Letters, 1997
Bookmarks Related papers MentionsView impact
Uploads
Papers by Philippe Jacquod