Concept

Correlation function (quantum field theory)

Publications associées (29)

Multipartite polariton entanglement in semiconductor microcavities

We study the entanglement of multiple polariton modes, which results in continuous variable cluster states suitable for quantum computation. Schemes are based on parametric scattering between spin-polarized lower and upper polariton branches in planar micr ...

2011

Effective spin-flip scattering in diffusive superconducting proximity systems with magnetic disorder

Dmitri Ivanov

We revisit the problem of diffusive proximity systems involving superconductors and normal metals (or ferromagnets) with magnetic disorder. On the length scales much larger than its correlation length, the effect of sufficiently weak magnetic disorder may ...

2009

Indirect detection of nitrogen-14 in solid-state NMR spectroscopy

Simone Cavadini

This thesis describes new methods for the detection of 14N nuclei by solid-state nuclear magnetic resonance. So far, the low natural abundance (0.4 %) 15N isotope has been widely used to study nitrogen-containing samples because of its spin-1/2 nature. The ...

EPFL2009

Bi-planar 2D-to-3D Registration in Fourier Domain for Stereoscopic X-Ray Motion Tracking

Jean-Philippe Thiran, Kamiar Aminian, Meritxell Bach Cuadra, Dominique Zosso, Benoît Le Callennec

In this paper we present a new method to track bone movements in stereoscopic X-ray image series of the knee joint. The method is based on two different X-ray image sets: a rotational series of acquisitions of the still subject knee that will allow the tom ...

2008

Efficient estimators for quantum instanton evaluation of the kinetic isotope effects: Application to the intramolecular hydrogen transfer in pentadiene

Jiri Vanicek

The quantum instanton approximation is used to compute kinetic isotope effects for intramolecular hydrogen transfer in cis-1,3-pentadiene. Due to the importance of skeleton motions, this system with 13 atoms is a simple prototype for hydrogen transfer in e ...

2007

Path integral evaluation of the kinetic isotope effects based on the quantum instanton approximation

Jiri Vanicek

A general method for computing kinetic isotope effects is described. The method uses the quantum-instanton approxn. and is based on the thermodn. integration with respect to the mass of the isotopes and on the path-integral Monte- A general method for comp ...

JINR2005

Dephasing representation: Employing the shadowing theorem to calculate quantum correlation functions

Jiri Vanicek

Due to the Heisenberg uncertainty principle, various classical systems differing only on the scale smaller than Planck's cell correspond to the same quantum system. We use this fact to find a unique semiclassical representation without the Van Vleck determ ...

2004

A general approach to the electronic spin relaxation of Gd(III) complexes in solutions. Monte Carlo simulations beyond the Redfield limit

André Merbach, Lothar Helm, Alain Borel

The time correlation functions of the electronic spin components of a metal ion without orbital degeneracy in solution are computed. The approach is based on the numerical solution of the time-dependent Schrödinger equation for a stochastic perturbing Hami ...

2001

On space-time scaling of cumulated rainfall fields

Andrea Rinaldo, Paolo d'Odorico

In the study of space-time rainfall it is particularly important to establish characteristic properties to guide both theoretical and modeling research efforts. In the present paper, new observational analyses on the scaling properties of time-evolving cum ...

1998

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