A5040306675- Atomic and Subatomic Physics Research
- Quantum, superfluid, helium dynamics
- Nuclear Physics and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum Electrodynamics and Casimir Effect
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Cosmology and Gravitation Theories
- Particle physics theoretical and experimental studies
- High-pressure geophysics and materials
- Advanced NMR Techniques and Applications
- Diamond and Carbon-based Materials Research
- Mechanical and Optical Resonators
- Quantum Mechanics and Applications
- Atomic and Molecular Physics
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Black Holes and Theoretical Physics
- Muon and positron interactions and applications
- Neutrino Physics Research
- Pulsars and Gravitational Waves Research
- Cold Fusion and Nuclear Reactions
- Noncommutative and Quantum Gravity Theories
- Advanced Frequency and Time Standards
Institut Laue-Langevin
2016-2025
Institut Langevin
2006-2024
Sofia University "St. Kliment Ohridski"
2023
ETH Zurich
2022
Stefan Meyer Institute for Subatomic Physics
2022
Austrian Academy of Sciences
2022
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
2012-2022
University of Turku
2022
Kurchatov Institute
2013
Technical University of Darmstadt
2009-2010
The lowest stationary quantum state of neutrons in the Earth's gravitational field is identified measurement neutron transmission between a horizontal mirror on bottom and an absorber top. Such assembly not transparent for if height smaller than "height" state.
The available data on neutron scattering were reviewed to constrain a hypothetical new short-range interaction. We show that these constraints are several orders of magnitude better than those usually cited in the range between 1 pm and 5 nm. This distance occupies an intermediate space collider searches for strongly coupled heavy bosons weak macroscopic forces. emphasize reliability insofar as they provide independent strategies. have identified promising way improve them.
We present estimations of systematic corrections and results their experimental studies for our neutron lifetime experiment carried out in 2008–2010 at ILL. Taking into account these corrections, we reduce the data three independent sets measurements (obtained during period 2008–2010) performed with different energy spectra ultracold neutrons (UCNs) trap temperatures to mean value equal 880.2(1.2) s.
The violation of Baryon Number, $\mathcal{B}$, is an essential ingredient for the preferential creation matter over antimatter needed to account observed baryon asymmetry in universe. However, such a process has yet be experimentally observed. HIBEAM/NNBAR %experiment program proposed two-stage experiment at European Spallation Source (ESS) search number violation. will include high-sensitivity searches processes that violate by one or two units: free neutron-antineutron oscillation...
We report on a new measurement of neutron beta-decay asymmetry. From the result A(0) = -0.1189(7), we derive ratio axial vector to coupling constant lambda g(A)/g(V) -1.2739(19). When included in world average for lifetime tau 885.7(7) s, this gives first element Cabibbo-Kobayashi-Maskawa (CKM) matrix V(ud). With value and Particle Data Group values V(us) V(ub), find deviation from unitarity condition row CKM Delta 0.0083(28), which is 3.0 times stated error.
We present a new constraint for the axion monopole-dipole coupling in range of $1\text{ }\text{ }\ensuremath{\mu}\mathrm{m}$--a few mm, previously unavailable experimental study. The was obtained using our recent results on observation neutron quantum states Earth's gravitational field. exploit ultimate sensitivity ultracold neutrons (UCN) lowest above material surface to any additional interaction between UCN and matter, if characteristic is within mentioned domain.
We present a design and performance tests of an intense source cold hydrogen atoms for loading large magnetic traps. Our is based on cryogenic dissociator molecular at 0.6 K followed by series thermal accommodators 0.5, 0.2 0.13 with inner surfaces covered superfluid helium film. All components are thermally anchored to corresponding stages dilution refrigerator. The provides continuous flux 7×1013 H atoms/s in temperature range 130-200 mK. have successfully used the Ioffe-Pritchard trap...
An upper limit to non-Newtonian attractive forces is obtained from the measurement of quantum states neutrons in earth's gravitational field. It established a completely new way and supports existing constraints nanometre range.
We present a theoretical study of the motion antihydrogen atom ($\overline{\mathrm{H}}$) in gravitational field Earth above material surface. predict that $\overline{\mathrm{H}}$ atom, falling surface, would settle into long-lived quantum states. point out method measuring difference energy such The allows for spectroscopy levels based on atom-interferometric principles. analyze general feasibility performing experiments this kind. provide force ($\mathit{Mg}$) acting and they might be...
We study quantum reflection of antihydrogen atoms from matter slabs due to the van der Waals/Casimir-Polder (vdW/CP) potential. By taking into account specificities and optical properties width we calculate realistic estimates for potential amplitudes. Next discuss paradoxical result larger coefficients estimated weaker potentials in terms Schwarzian derivative. analyze limiting case reflections at small energies, which are characterized by a scattering length have interesting applications...
We study theoretically the quantum motion of a neutron in horizontal waveguide gravitational field Earth. The question is equipped with mirror below and rough surface absorber above. show that such system acts as filter, i.e. it effectively absorbs states sufficiently high transversal energy but transmits low-energy states. transmitted are determined mainly by potential well formed Earth mirror. formalism developed for an absorbing applied to description recent experiment on observation...