A5022480410- Atomic and Subatomic Physics Research
- Dark Matter and Cosmic Phenomena
- Quantum, superfluid, helium dynamics
- Radiation Detection and Scintillator Technologies
- Mechanical and Optical Resonators
- Quantum Electrodynamics and Casimir Effect
- Particle physics theoretical and experimental studies
- Spectroscopy and Laser Applications
- Neutrino Physics Research
- Advanced Chemical Physics Studies
- Cold Atom Physics and Bose-Einstein Condensates
- Nuclear Physics and Applications
- Particle Detector Development and Performance
- Terahertz technology and applications
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Thermal Radiation and Cooling Technologies
- Luminescence Properties of Advanced Materials
- Quantum optics and atomic interactions
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Radioactive Decay and Measurement Techniques
- Quantum Information and Cryptography
- Superconducting and THz Device Technology
- Photocathodes and Microchannel Plates
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2016-2025
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro
1990-2023
Istituto Nazionale di Fisica Nucleare
2002-2023
University of Padua
2002-2022
Osservatorio Astronomico di Padova
2014-2022
University of Ferrara
2020
University of Siena
2017-2020
Istituto di Matematica Applicata e Tecnologie Informatiche
2017
Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara
2017
Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
2011
We report on the measurement of Casimir force between conducting surfaces in a parallel configuration. The is exerted silicon cantilever coated with chromium and similar rigid surface detected by looking at shifts induced frequency when latter approached. scaling distance was tested 0.5-3.0 microm range, related coefficient determined 15% precision level.
To account for the dark-matter content in our Universe, postinflationary scenarios predict QCD axion a mass range $(10--{10}^{3})\text{ }\text{ }\ensuremath{\mu}\mathrm{eV}$. Searches with haloscope experiments this require monitoring of resonant cavity modes frequency above 5 GHz, where several experimental limitations occur due to linear amplifiers, small volumes, and low quality factors copper cavities. In paper, we deal last issue, presenting result search galactic axions using based on...
A haloscope of the QUAX--$a\gamma$ experiment composed an oxygen-free high thermal conductivity-Cu cavity inside 8.1 T magnet and cooled to $\sim200$ mK is put in operation for search galactic axion with mass $m_a\simeq43~\mu\text{eV}$. The power emitted by resonant amplified a Josephson parametric amplifier whose noise fluctuations are at standard quantum limit. With data collected about 1 h frequency $\nu_c=10.40176$ GHz, reaches sensitivity necessary detection QCD-axion, setting $90\%$...
A ferromagnetic axion haloscope searches for dark matter in the form of axions by exploiting their interaction with electronic spins. It is composed an axion-to-electromagnetic field transducer coupled to a sensitive rf detector. The former photon-magnon hybrid system, and latter based on quantum-limited Josephson parametric amplifier. system consists ten 2.1 mm diameter yttrium iron garnet spheres single microwave cavity mode means static magnetic field. Our setup most spin magnetometer...
A haloscope of the QUAX--$a\ensuremath{\gamma}$ experiment, composed an high-$Q$ resonant cavity immersed in a 8 T magnet and cooled to $\ensuremath{\sim}4.5\text{ }\text{ }\mathrm{K}$ is operated search for galactic axions with mass ${m}_{a}\ensuremath{\simeq}42.8\text{ }\ensuremath{\mu}\mathrm{eV}$, not accessible other running experiments. The design hollow dielectric cylinders concentrically inserted OFHC Cu cavity, allowed us maintain loaded quality-factor...
In order to observe the Casimir radiation we propose a new experimental scheme with no mechanically moving mirror. fact estimate that power required for sustained mechanical vibration would be beyond present possibilities. Our apparatus consists of superconducting electromagnetic resonant cavity wall covered by semiconductor layer whose reflectivity is driven laser at gigahertz frequencies. The thus acts as Preliminary laboratory tests showed can indeed reflect microwaves efficiently...
Axions, originally proposed to solve the strong CP problem of quantum chromodynamics, emerge now as leading candidates WISP dark matter. The rich phenomenology associated light and stable QCD axion can be described an effective magnetic field that experimentally investigated. For QUAX experiment, matter axions are searched by means their resonant interactions with electronic spins in a magnetized sample. In principle, axion-induced magnetization changes detected embedding sample rf cavity...
A traveling wave parametric amplifier has been integrated in the haloscope of QUAX experiment. search for dark matter axions performed with a high-$Q$ dielectric cavity immersed an 8 T magnetic field and read by detection chain having system noise temperature about 2.1 K at frequency 10.353 GHz. Scanning conducted varying using sapphire rods into cavity. At multiple operating frequencies, sensitivity instrument was level viable axion models.
We demonstrate an all-optical method for manipulating the magnetization in a 1-mm yttrium-iron-garnet (YIG) sphere placed $\ensuremath{\sim}0.17\text{ }\text{ }\mathrm{T}$ uniform magnetic field. A harmonic of frequency comb delivered by multi-GHz infrared laser source is tuned to Larmor YIG drive oscillations, which turn give rise radiation field used thoroughly investigate phenomenon. The damping issue that occurs at high and presence highly magnetizated materials has been overcome...
In the search for axionic dark matter, high-frequency part of quantum chromodynamics (QCD) axion parameter space is favored, as indicated by both cosmological and astrophysical arguments recent indications from lattice QCD calculations. To extend probing range cavity haloscopes, solutions addressing unfavorable scaling volume with frequency must be developed. Here, we present a novel type high-volume thin-shell resonator haloscope dark-matter searches. The formed two nested coaxial...
In this paper, the status of experiment MIR (motion induced radiation) is reported. This aims at measuring for first time dynamical Casimir effect by using an effective motion a wall superconducting microwave resonant cavity. Effective produced periodic illumination semiconductor slab means ultra-high-frequency amplitude modulated laser.
We present a more stringent upper limit on long-range axion-mediated forces obtained by the QUAX-gpgs experiment, located at INFN – Laboratori Nazionali di Legnaro. By measuring variations of paramagnetic GSO crystal magnetization with dc-SQUID magnetometer we investigate possible coupling between electron spins and unpolarized nucleons in lead disks. The induced can be interpreted as effect spin dependent interaction mediated axions or Axion Like Particles (ALPs). corresponding strength is...
According to QED a metallic mirror set in motion quantum vacuum gives rise “dissipated” energy the form of real photons. This phenomenon, called dynamical Casimir effect, has never been observed due unsolved technical difficulties: order obtain an experimentally measurable number photons from fluctuations reflecting surface fact vibrate at very high frequencies (≃109 Hz). As these are too be achieved with purely mechanical oscillation, our idea is switch effective microwave on and off short...
New measurements to test the neutrality of matter by acoustic means are reported. The apparatus is based on a spherical capacitor filled with gaseous SF$_6$ excited an oscillating electric field. has been calibrated measuring polarizability. Assuming charge conservation in $\beta$ decay neutron, experiment gives limit $\epsilon_\text{p-e}\lesssim1\cdot10^{-21}$ for electron-proton difference, same holding neutron. Previous critically reviewed and found incorrect: present result best obtained...
We present a detection scheme to search for QCD axion dark matter, that is based on direct interaction between axions and electrons explicitly predicted by DFSZ models. The local matter field shall drive transitions Zeeman-split atomic levels separated the rest mass energy $m_a c^2$. Axion-related excitations are then detected with an upconversion involving pump laser converts absorbed ($\sim $ hundreds of $\mu$eV) visible or infrared photons, where single photon established technique....
A photon-magnon hybrid system can be realized by coupling the electron spin resonance of a magnetic material to microwave cavity mode. The quasiparticles associated with dynamics are magnon polaritons, which arise from mixing strongly coupled magnons and photons. We illustrate how these particles used probe magnetization sample remarkable sensitivity, devising suitable spin-magnetometers, ultimately directly assess oscillating fields. Specifically, capability polaritons converting...
The spin resonance of electrons can be coupled to a microwave cavity mode obtain photon-magnon hybrid system. These quantum systems are widely studied for both fundamental physics and technological applications. In this paper, the behavior large number ferrimagnetic spheres single is tested. We use second-quantization modeling harmonic oscillators theoretically describe our experimental setup understand influence several parameters. magnon-polariton dispersion relation used characterize...
The frequency band 1--15 GHz provides exciting prospects for resonant axion haloscopes as indicated by cosmological and astrophysical arguments. Among the challenges currently addressed to reach required sensitivity, development of high-quality factor cavities that tolerate multitesla fields plays a central role. We report three-dimensional resonator based on right-circular copper cavity with hollow cylinders confine higher-order modes around cylinder axis. Its effective volume at 10.3 is...