Concept

Oscillateur harmonique quantique

Publications associées (172)

A Framework for Numerical Simulations of Structure Formation

In the absence of a full analytical treatment of nonlinear structure formation in the universe, numerical simulations provide the critical link between the properties of the underlying model and the features of the observed structures. Currently N-body sim ...

EPFL2011

Phonon confinement and plasmon-phonon interaction in nanowire-based quantum wells

Anna Fontcuberta i Morral, Bernt Ketterer

Resonant Raman spectroscopy is realized on closely spaced nanowire-based quantum wells. Phonon quantization consistent with 2.4-nm-thick quantum wells is observed, in agreement with cross-section transmission electron microscopy measurements and photolumin ...

2011

Vibrational Relaxation and Intersystem Crossing of Binuclear Metal Complexes in Solution

Majed Chergui, Frank van Mourik, Andrea Cannizzo, Renske Marjan van der Veen

The ultrafast vibrational-electronic relaxation upon excitation into the singlet (1)A(2u) (d sigma*-> p sigma) excited state of the d(8)-d(8) binuclear complex Pt-2(P2O5H2)(4) has been investigated in different solvents by femtosecond polychromatic f ...

2011

On the Precision of Circadian Oscillators

Thomas d'Eysmond

Precision is a crucial property of noisy circadian oscillators that can be quantified by the quality factor (Q). Until now, deterministic properties of circadian oscillations like the period or amplitude attracted most of the attention while relatively few ...

EPFL2011

Cavity Optomechanics: Cooling of a Micromechanical Oscillator into the Quantum Regime

Tobias Kippenberg, Albert Schliesser, Emanuel Gavartin, Stefan Alexander Weis

Using optical sideband cooling, a micromechanical oscillator is cooled to a phonon occupancy below 10 phonons, corresponding to a probability of finding it in its quantum ground state more than 10% of the time. ...

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

Lagrange Equations Coupled to a Thermal Equation: Mechanics as Consequence of Thermodynamics

Sylvain Bréchet, Christian Gruber

Following the analytic approach to thermodynamics developed by Stuckelberg, we study the evolution equations of a closed thermodynamic system consisting of point particles in a fluid. We obtain a system of coupled differential equations describing the mech ...

MDPI AG2011

Exciton Condensation Driving the Periodic Lattice Distortion of 1T-TiSe_{2}

Corsin Battaglia, Philipp Aebi

We address the lattice deformation of 1T-TiSe2 within the exciton condensate phase. We show that, at low temperature, condensed excitons influence the lattice through electron-phonon interaction. It is found that at zero temperature, in the exciton condens ...

2011

Cooling of a Micromechanical Oscillator into the Quantum Regime

Tobias Kippenberg, Albert Schliesser, Emanuel Gavartin, Stefan Alexander Weis

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

Human-Robot Synchrony: Flexible Assistance Using Adaptive Oscillators

Auke Ijspeert, Jesse van den Kieboom, Renaud Ronsse

We propose a novel method for movement assistance that is based on adaptive oscillators, i. e., mathematical tools that are capable of extracting the high-level features (amplitude, frequency, and offset) of a periodic signal. Such an oscillator acts like ...

2011

State-selective detection of velocity-filtered ND3 molecules

Andreas Osterwalder, Benjamin Bertsche

Translationally cold and slow ND3 is prepared by filtering the slow molecules from a thermal gas-phase sample using a curved electrostatic hexapole guide. This filter, like the curved quadrupole guide introduced by Rangwala et al. Phys. Rev. A 67 043406 (2 ...

2010

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