Concept

Square root of 3

Related publications (42)

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Time resolved luminescence measurements on polydiacetylenes

Christian Blumer

In this work time resolved luminescence measurements on the red phase of 3BCMU are presented. These polydiacetylenes form an ordered and isolated one dimensional model system. This work is divided in two parts. First we present an excitation spectrum in ch ...

EPFL2006

, ,

A fast algorithm is developed for the directional correlation of scalar band-limited signals and band-limited steerable filters on the sphere. The asymptotic complexity associated to it through simple quadrature is of order O(L^5), where 2L stands for the ...

2006

Filling Kinetics of Liquids in Nanochannels down to 27 nm Deep by Capillary Force

Nico de Rooij

We report the filling kinetics of different liquids in nanofabricated capillaries with rectangular cross-section by capillary force. Three sets of channels with different geometry were employed for the experiments. The smallest dimension of the channel cro ...

2005

Temperature dependence of the photoluminescence lifetime in disordered quantum wires

Benoît Marie Joseph Deveaud, Vincenzo Savona, Andrea Feltrin

We present a theoretical model of the time-resolved excitonic photoluminescence in quantum wires. We study the role of disorder on the temperature dependence of the photoluminescence lifetime. We find that at low temperature the exciton population is not t ...

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

On the condition of a complex eigenvalue under real perturbations

Daniel Kressner

We investigate the condition number for a complex eigenvalue of a real matrix under real perturbations. Based on an explicit formula, it is shown that this number is never smaller than 1/root2 times the corresponding condition number with respect to comple ...

2004

Modeling the photoluminescence lifetime in realistic quantum wires

Benoît Marie Joseph Deveaud, Vincenzo Savona, Andrea Feltrin

We present a theoretical model of the time-resolved excitonic photoluminescence in quantum wires. We study the role of disorder and of the exciton-free-carrier interaction on the temperature dependence of the photoluminescence lifetime. We find that at low ...

2004

We pose and solve a parameter estimation problem in the presence of bounded data uncertainties. The problem involves a minimization step and admits a closed form solution in terms of the positive root of a secular equation. ...

Society for Industrial and Applied Mathematics1999

The prediction of speed and incline in outdoor running in humans using accelerometry

Kamiar Aminian, Yves Schutz

Purpose: To explore whether triaxial accelerometric measurements can be utilized to accurately assess speed and incline of running in free-living conditions. Methods: Body accelerations during running were recorded at the lower back and at the heel by a po ...

1999

Strongly driven semiconductor microcavities: From the polariton doublet to an AC Stark triplet

Romuald Houdré, Benoît Marie Joseph Deveaud, Ursula Oesterle

We report femtosecond pump and probe experiments in a semiconductor microcavity containing quantum wells. At high pump fields, the exciton-polariton Rabi doublet changes into a triplet structure. The triplet splitting increases as the square root of the in ...

1998

Particle and Heat-Transport in a Partially Stochastic Magnetic-Field

Libero Zuppiroli, Marie-Noëlle Bussac

Particle and heat transport in a low collisional plasma confined by a partially stochastic magnetic field are analysed. We show that the particle diffusion is ambipolar. Moreover near stochastic threshold, the electron heat diffusivity chi(e) is enhanced, ...

1994