Quantum thermodynamics follows the approach of classical thermodynamics to study the energy exchange during the interaction of quantum systems. It defines the quantum counterparts of heat, work, and entropy, and it provides equations that constrain the variation of these quantities. The Maxwell's demon Gedankenexperiment portrays a tiny being that uses the information on individual molecules...
Cavity quantum electrodynamics (CQED) is a field where the emission properties of atomes are modified by coupling with modes of cavities. Using Rydberg atoms coupled with ultra high finesse microwave cavities, the CQED team of LKB achieved a strong coupling regime, where the interaction of atoms with light is much stronger than decoherence. The very long life-time of the cavities made it...
The aim of this work is the calculation of vibrational properties of hydrogen-rich materials where Nuclear Quantum Effects play an important role. The computational methods are based on Molecular Dynamics simulations combined with Quantum Monte Carlo (QMC) for the electronic part and a Langevin thermostat correlated according to the covariance matrix of QMC nuclear forces. In particular, we...
Schematic representation of grazing incidence diffraction (GIFAD) discovered in the group by Patrick Rousseau. At grazing incidence, the fast He projectile with keV energy is diffracted by the well-ordered rows of atoms by successive gentle collisions. The He projectile is repelled by the surface electronic density so that GIFAD can be seen as a helium tip AFM operated in the reciprocal...
We investigate the role of cell contractility and molecular adhesion in the formation of the blastocoel during early mouse embryo development, a fluid-filled lumen that positions the first axis of symmetry of the embryo. We show that hundreds of micron-sized fluid filled cavities appear throughout the entire embryo on basolateral (adhesive) sides of cells, fracking cell-cell contacts. Via a...
In the last decades, nuclear equation of state has been a dealing problem. Measuring neutron stars (NSs) radii can bring a key information on nuclear matter properties at very high densities. We employ an empirical parameterization of the equation of state with a Markov-Chain Monte Carlo approach in a Bayesian framework, to consistently fit the spectra of 7 selected NSs. Despite previous...
High-speed data transfer through optical fibres using spatial multiplexing is practically limited by modal crosstalk. Instead of considering this modal crosstalk as a limitation, we here harness its mode mixing to process quantum optical information. We implement a programmable linear optical network based on the concept of inverse photonic design exploiting the technology of wavefront...
Inflation theories elegantly address a number of problems raised by the standard Hot Big Bang scenario, however one of its major predictions, the existence of a stochastic background of cosmological gravitational waves, is yet to be confirmed. Currently the most promising, if not the only, way to achieving this is through the observation of the Cosmic Microwave Background (CMB) polarization....
The SOLEIL synchrotron is the French national third generation light source storage ring, which provides photon beams to 29 beamlines from infrared to hard X-rays. Future synchrotron sources aim at increasing the brilliance by decreasing the electron beam emittance, down to the natural diffraction limit: they are Diffraction Limited Storage Rings (DLSRs). In order to improve its performance...
the Experimental and theoretical research related to improving the transfer of A number of authors have carried out heat using nanoparticles and their results showed that the heat transfer of nanofluids is very important in this context our work presents a critical model for improved heat transfer This work is done on the basis of a 2D numerical dimension of heat transport models, which can be...
The properties of extremes of a stochastic process/time series of a given duration $T$ are of fundamental importance in describing a plethora of natural phenomena. For example, this time series may represent the amplitude of earthquakes in a specific seismic region, the amount of yearly rainfall in a given area, the temperature records in a given weather station, etc. The study of extremes in...
Many phenomena remain poorly understood in amorphous materials such as plasticity and shear banding, their brittleness and disordered structure making it difficult to study them experimentally. As a consequence, we use model two-dimensional Lennard-Jones glasses and measure their local yield stress, a measure of the local softness, as presented in [1]. This method is nonperturbative and is...
