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M. Baldo Luis Najera-Santos (Laboratoire Kastler Brossel)PhysicsPoster
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...
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Valentin Métillon (LKB - Collège de France)PhysicsPoster
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...
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Dr Tommaso Morresi (Sorbonne Université, UPMC)PhysicsPoster
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...
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Zhibo WuPhysicsPoster
The steadily increasing luminosity of LHC requires an upgrade to high rate and high-resolution capable detector technology for the inner end cap of the muon spectrometer of the ATLAS experiment. For precision tracking, large area Micromegas quadruplets are produced, in order to provide 8 consecutive active layers with 100 micron spatial resolution per individual plane. As for validation of the...
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Maxence Revolle (CEA Saclay)PhysicsPoster
Micro-Pattern Gas Detectors (MPGD) are now commonly used in particle physics experiences (COMPASS,ALICE,ATLAS...), mainly as a particle tracker. For the new Electron Ion Collider (EIC) in the USA, planned for 2030, a collaboration between CEA-Saclay, Brookhaven National Laboratory and Stony Brooks University have been created with the goal of improving MPGDs based tracking chambers. By using...
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M. Hugo Jonquiere (ONERA)PhysicsPoster
La complexité des optiques spatiales va croissante (Projet ELT : 981 segments de 1.5 m de diamètre, de formes différentes, Miroirs free-form, etc...) tandis que dans le même temps, les cadences de production s’accélèrent (Exemple : Projet ELT : 3 ans pour produire 981 segments).
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Les gammes d’instruments métrologiques doivent s’adapter et requièrent des solutions industrielles performantes et... -
Marc Arène (APC)PhysicsPoster
Gravitational waves are ripples of space time typically produced by inspiraling pairs of neutron stars and/or black holes, our sources. Once detected by the ground-based LIGO and Virgo interferometers, the next step is to estimate the parameters of these sources such as their distance, localization in the sky, masses of each component etc.
This task is currently carried out by MCMC...
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Peng PAN (ISMO-CNRS-UniversitéPariSaclay)PhysicsPoster
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...
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Aishik Ghosh (LAL)PhysicsPoster
Accurate simulations of a showers from particles from the Large Hadron Collider in the ATLAS calorimeter are incredibly resource intensive, consuming the largest fraction of CPU time on the CERN computing grid. Generative Adversarial Networks are investigated as a scalable solution for modelling the response of the electromagnetic calorimeter for photons over a range of energies. Steps have...
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M. Mathieu LE VERGE SERANDOUR (Collège de France)PhysicsPoster
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...
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Osmin LacombePhysicsPoster
Supersymmetry (SUSY) was first introduced to address unanswered aspects of the Standard Model of particle physics such as the unification of gauge couplings at high energies. It then proved useful in broader theoretical contexts, from string theory to dark-matter models. SUSY assumes the existence of N symmetries relating fermionic and bosonic fields. When N>1, it is referred to as...
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Nicolas Baillot d'Etivaux (IPN Lyon)PhysicsPoster
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...
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M. Saroch Leedumrongwatthanakun (LKB, Département de Physique, Ecole Normale Supérieure)PhysicsPoster
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...
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Hugo PerrinPhysicsPoster
Quantum walks can be seen as the quantum counterpart of the classical random walk on lattice. They lead to a dynamic which is very different from the tight binding hamiltonian framework and its schrodinger equation. Other features from both systems can be compared and I mainly focus on the effect of a transverse magnetic field to the lattice. In the hamiltonian case, when we plot the...
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Hamza El Bouhargani (AstroParticle and Cosmology laboratory (APC))PhysicsPoster
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....
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Lina HOUMMI (University of Liverpool/Synchrotron SOLEIL)PhysicsPoster
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...
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Ayoub Aouina (LSI)PhysicsPoster
In material science we often use model systems to describe real materials. In this talk we are interested in the question of how to import, in principle exactly, a quantity of interest from a model into a real system. The prescription how to do that is what we call "connector theory" [1]. An enormous advantage of this strategy is that model results can be obtained once forever and tabulated....
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Gregory PAGE (LPTMC)PhysicsPoster
A new class of 2D billiards, defined by a unit circle enclosing a geometrically variable, central scattering ellipse is introduced.
The system exhibits mixed dynamics which is explored via Recurrence plots (RPs) and the associated recurrence quantification analysis (RQA), with a focus on long-term motion starting from the unstable period 2 orbit.
The main result shows the existence of a...
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Dr Soufiya MIZANI (1Laboratory of condensed matter, faculty of sciences Ben M`sick (URAC.10). University Hassan II of Casablanca, Morocco), Dr Hicham ZERRADI (1Laboratory of condensed matter, faculty of sciences Ben M`sick (URAC.10). University Hassan II of Casablanca, Morocco), Prof. Aouatif DEZAIRI (1Laboratory of condensed matter, faculty of sciences Ben M`sick (URAC.10). University Hassan II of Casablanca, Morocco)PhysicsPoster
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...
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M. Francesco Mori (LPTMS, Université Paris-Sud)PhysicsPoster
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...
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Armand Barbot (PMMH, CNRS UMR 7636, ESPCI Paris, PSL University, Sorbonne Université, Université de Paris, F-75005 Paris, France)PhysicsPoster
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...
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