Publications associées à Matrice densité

A first-principles description of proton-driven spin diffusion

Herein we design a reduced Liouville space for the simulation of proton-driven spin diffusion. Using this approach, the experimentally observed carbon-13 polarisation transfer in a powder sample undergoing magic-angle spinning is quantitatively described, ...

ROYAL SOC CHEMISTRY2012

Penrose-Onsager Criterion Validation in a One-Dimensional Polariton Condensate

Benoît Marie Joseph Deveaud, Konstantinos Lagoudakis, Francesco Manni

We perform quantum tomography on one-dimensional polariton condensates, spontaneously occurring in linear disorder valleys in a CdTe planar microcavity sample. By the use of optical interferometric techniques, we determine the first-order coherence functio ...

Amer Physical Soc2012

Measuring nonadiabaticity of molecular quantum dynamics with quantum fidelity and with its efficient semiclassical approximation

Jiri Vanicek, Tomas Zimmermann

We propose to measure nonadiabaticity of molecular quantum dynamics rigorously with the quantum fidelity between the Born-Oppenheimer and fully nonadiabatic dynamics. It is shown that this measure of nonadiabaticity applies in situations where other criter ...

American Institute of Physics2012

Fringe demodulation using the two-dimensional phase differencing operator

Pramod Rastogi

The Letter proposes a method for phase estimation from a fringe pattern. The proposed method relies on a parametric approach where the phase is locally approximated as a two-dimensional (2D) polynomial, with the ensuing polynomial coefficients as the respe ...

Optical Society of America2012

Universal Rateless Codes From Coupled LT Codes

Rüdiger Urbanke, Vahid Aref

It was recently shown that spatial coupling of individual low-density parity-check codes improves the belief-propagation threshold of the coupled ensemble essentially to the maximum a posteriori threshold of the underlying ensemble. We study the performanc ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2011

A 6.5 - 50 GHz battery-powered compact rotary joint for polarization ellipticity measurements

Jean-François Zürcher

A simple, efficient, and compact rotary joint has been designed, realized, and measured. It has been used intensively to perform polarization ellipticity measurements on various circularly polarized antennas (e.g., helical antennas and circularly polarized ...

Wiley-Blackwell2011

Nonlinear Motion Control of CPG-based Movement with Applications to a Class of Swimming Robots

Auke Ijspeert, Yannick Morel, Mathieu Porez

In bio-inspired robotics, use of a Central Pattern Generator (CPG) to coordinate actuation is fairly common. The gait achieved depends on a number of CPG parameters, which can be adjusted to control the robot's motion. This paper presents an output feedbac ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2011

Optical properties of clusters and molecules from real-time time-dependent density functional theory using a self-consistent field

Efthimios Kaxiras, Sheng Meng, Jun Ren

We present a detailed study of optical absorption spectra of finite-size structures, using a method based on time-dependent density-functional theory (TDDFT), which involves a self-consistent field for the propagation of the Kohn-Sham wavefunctions in real ...

2010

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Matrice densité

A first-principles description of proton-driven spin diffusion

Penrose-Onsager Criterion Validation in a One-Dimensional Polariton Condensate

Measuring nonadiabaticity of molecular quantum dynamics with quantum fidelity and with its efficient semiclassical approximation

Fringe demodulation using the two-dimensional phase differencing operator

Compressive Sensing under Matrix Uncertainties: An Approximate Message Passing Approach

Universal Rateless Codes From Coupled LT Codes

A 6.5 - 50 GHz battery-powered compact rotary joint for polarization ellipticity measurements

Accelerating GW calculations with optimal polarizability basis

Nonlinear Motion Control of CPG-based Movement with Applications to a Class of Swimming Robots

Optical properties of clusters and molecules from real-time time-dependent density functional theory using a self-consistent field

Graph Chatbot

Chattez avec Graph Search

Optical properties of clusters and molecules from real-time time-dependent density functional theory using a self-consistent field

Measuring nonadiabaticity of molecular quantum dynamics with quantum fidelity and with its efficient semiclassical approximation

A 6.5 - 50 GHz battery-powered compact rotary joint for polarization ellipticity measurements

Nonlinear Motion Control of CPG-based Movement with Applications to a Class of Swimming Robots

Accelerating GW calculations with optimal polarizability basis

Penrose-Onsager Criterion Validation in a One-Dimensional Polariton Condensate

A first-principles description of proton-driven spin diffusion

Compressive Sensing under Matrix Uncertainties: An Approximate Message Passing Approach

Universal Rateless Codes From Coupled LT Codes

Fringe demodulation using the two-dimensional phase differencing operator