A5088626694- Atomic and Subatomic Physics Research
- Dark Matter and Cosmic Phenomena
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum optics and atomic interactions
- Electromagnetic Compatibility and Measurements
- Geophysics and Sensor Technology
- Atomic and Molecular Physics
- Magneto-Optical Properties and Applications
- Antenna Design and Analysis
- Particle Detector Development and Performance
- Antenna Design and Optimization
- Geomagnetism and Paleomagnetism Studies
- Pulsars and Gravitational Waves Research
- Muon and positron interactions and applications
- Advanced Frequency and Time Standards
- Particle physics theoretical and experimental studies
- Quantum, superfluid, helium dynamics
- Quantum Mechanics and Applications
- Mechanical and Optical Resonators
- Quantum Electrodynamics and Casimir Effect
- Advanced MRI Techniques and Applications
- Particle accelerators and beam dynamics
- Solar and Space Plasma Dynamics
- Advanced Chemical Physics Studies
- Optical Polarization and Ellipsometry
University of Pavia
2024
Laboratoire National des Champs Magnétiques Intenses
2013-2023
Université Grenoble Alpes
2017-2023
Centre National de la Recherche Scientifique
2010-2023
Institut National des Sciences Appliquées de Toulouse
2012-2023
Université Toulouse III - Paul Sabatier
2008-2021
Istituto di Scienza e Tecnologie dell'Informazione "Alessandro Faedo"
2017
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
1998-2017
University of Pisa
1998-2017
National Interuniversity Consortium for the Physical Sciences of Matter
2017
We have searched for light scalar and/or pseudoscalar particles that couple to two photons by studying the propagation of a laser beam ($\ensuremath{\lambda}=514$ nm) through transverse magnetic field. A limit 3.5\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}10}$ rad was set on possible optical rotation polarization an effective path length 2.2 km in 3.25 T find coupling...
Recently, axionlike particle search has received renewed interest. In particular, several groups have started ``light shining through a wall'' experiments based on magnetic field and laser both continuous, which is very demanding in terms of detector background. We present here the $2\ensuremath{\sigma}$ limits obtained so far with our novel setup consisting pulsed laser. we found that two photons inverse coupling constant $M$ $>8\ifmmode\times\else\texttimes\fi{}{10}^{5}\text{ }\text{...
When polarized light passes through a material in the presence of strong magnetic field, birefringence is observed. This known as Cotton-Mouton effect. Owing to increasing sophistication both experimental and computational techniques, this particular aspect magneto-optics has been investigated increasingly last few years. In review basic facts concerning experiment theory are discussed tables summarizing all currently gas-phase data presented.
Recently, axionlike particle search has received renewed interest, and several groups have started experiments. In this paper, we present the final results of our experiment on photon-axion oscillations in presence a magnetic field, which took place at Laboratoire pour l'Utilisation des Lasers Intenses, Palaiseau, France. Our null measurement allowed us to exclude existence axions with inverse coupling constant $M>9.\ifmmode\times\else\texttimes\fi{}{10}^{5}\text{ }\text{ }\mathrm{GeV}$ for...
In this paper we set a framework in which experiments whose goal is to test QED predictions can be used more general way nonlinear electrodynamics (NLED) contains low-energy as special case. We review some of these and establish limits on the different free parameters by generalizing NLED. finally discuss implications bound systems isolated charged particles for has been widely successfully tested.
We are searching for the coherent production of light pseudoscalar or scalar particles in a 12-m optical cavity placed 5-T transverse magnetic field. From level observed rotation we have set limit on coupling such to two photons, ${\mathit{g}}_{\mathit{a}\ensuremath{\gamma}\ensuremath{\gamma}}$2.5\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}6}$ ${\mathrm{GeV}}^{\mathrm{\ensuremath{-}}1}$, provided...
While measurements of the hyperfine structure hydrogen-like atoms are traditionally regarded as test bound-state QED, we assume that theoretical QED predictions accurate and discuss information about electromagnetic protons could be extracted from experimental values ground state splitting in hydrogen muonic hydrogen. Using recent results on proton polarizability effects obtain for Zemach radius value 1.040(16) fm. We compare it to various estimates uncertainty which is shown larger 0.016...
We describe the principle and status of PVLAS experiment which is being assembled at INFN Laboratori Nazionali di Legnaro (Legnaro, Padua, Italy) to look for coherent effects, related QED vacuum structure, on propagation a polarized light beam in strong magnetic field.
In this letter we describe our novel photon regeneration experiment for the axionlike particle search using a x-ray beam with energy of 50.2 keV and 90.7 keV, two superconducting magnets 3 T, Ge detector high quantum efficiency. A counting rate regenerated photons compatible zero has been measured. The corresponding limits on pseudoscalar particle-two coupling constant is obtained as function mass. Our setup widens window purely terrestrial experiments devoted to by photons. It also opens...
In this paper we present the realization of further steps toward measurement magnetic birefringence a vacuum using pulsed fields. After describing our experiment, report calibration apparatus nitrogen gas and discuss precision giving detailed error budget. Our best upper limit is...
We perform saturated absorption spectroscopy on the D$\_2$ line for room temperature rubidium atoms immersed in magnetic fields within 0.05-0.13 T range. At those medium-high field values hyperfine structure excited state is broken by Zeeman effect, while ground and shifts are comparable. The observed spectra composed a large number of lines. identify them as absorptions two-level systems, three-level systems V configuration four-level N or double-N where two optical transitions not sharing...
We calculate the optical properties of a vacuum when static magnetic field ${B}_{0}$ and electric ${E}_{0}$ are applied perpendicular to direction light propagation. Apart from known Cotton-Mouton Kerr effects, with crossed fields we find magnetoelectric linear birefringence axes parallel external fields. With Jones under 45\ifmmode^\circ\else\textdegree\fi{} Both birefringences in ${E}_{0}{B}_{0},$ have same magnitude.
In this work we present data characterizing the sensitivity of Biréfringence Magnetique du Vide (BMV) instrument. BMV is an experiment attempting to measure vacuum magnetic birefringence (VMB) via measurement ellipticity induced in a linearly polarized laser field propagating through birefringent region presence external field. Correlated measurements noise alongside main detection channel allow us separate measured sensing from inherent apparatus. To end, model different sources for...
A particle $\ensuremath{\phi}$ coupling to two photons couples also radiatively charged particles, like protons. If the is a light scalar, this induced leads spin-independent non-Newtonian forces. We show that experimental constraints on exotic, fifth-type forces lead stringent $\ensuremath{\phi}\ensuremath{\gamma}\ensuremath{\gamma}$ coupling. discuss impact recent PVLAS results and role of paraphoton models introduced solve PVLAS-CAST puzzle.
We report frequency locking of a Nd:YAG tunable laser to 2000 finesse 87-cm-long Fabry–Pérot cavity in air using the Pound–Drever technique. The novelty is that necessary phase modulation beam obtained directly instead an external modulator (Pockels cell). spurious relative amplitude this method was ∼3×10−5 with index β∼1 and spectral density difference between below 1 mHz/√Hz region 1–500 Hz.
The tensor components of the electric dipole polarizability at a wavelength 632.8 nm, those magnetizability and anisotropy static hypermagnetizability furan, thiophene, selenophene are computed using density functional theory (DFT). polarizable continuum model (PCM) is employed to describe system in condensed phase. We can thus compare temperature dependence Cotton–Mouton constant for three molecules, both gas phase, pure liquids, solutions, with results experiment performed 17 T radial...