A5026408192- Atomic and Subatomic Physics Research
- Quantum optics and atomic interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum, superfluid, helium dynamics
- Advanced MRI Techniques and Applications
- Advanced Frequency and Time Standards
- Spectroscopy and Laser Applications
- Mechanical and Optical Resonators
- Advanced NMR Techniques and Applications
- Geophysics and Sensor Technology
- Quantum Information and Cryptography
- Magneto-Optical Properties and Applications
- Spectroscopy and Quantum Chemical Studies
- Solid-state spectroscopy and crystallography
- Photonic and Optical Devices
- Laser Design and Applications
- Physics of Superconductivity and Magnetism
- Dark Matter and Cosmic Phenomena
- Magnetic Field Sensors Techniques
- Gyrotron and Vacuum Electronics Research
- Perovskite Materials and Applications
- Solid State Laser Technologies
- Quantum chaos and dynamical systems
- Noncommutative and Quantum Gravity Theories
- Advanced Chemical Physics Studies
Ioffe Institute
2015-2024
National Research University Higher School of Economics
2021
Russian Academy of Sciences
2005-2013
ITMO University
2012
Physico-Technical Institute
2006-2009
University of Fribourg
2005-2009
Paul Scherrer Institute
2009
Technical University of Munich
2009
State Optical Institute named after SI Vavilov
1997-2008
Petersburg Nuclear Physics Institute
2006
We present a theoretical study of the spectra produced by optical--radio-frequency double resonance devices, in which resonant linearly polarized light is used optical pumping and detection processes. extend previous work presenting algebraic results are valid for atomic states with arbitrary angular momenta, rf intensities, geometries. The only restriction made assumption low intensity. discussed view their use magnetometers.
A clock comparison experiment, analyzing the ratio of spin precession frequencies stored ultracold neutrons and 199Hg atoms, is reported. No daily variation this could be found, from which set an upper limit on Lorentz invariance violating cosmic anisotropy field b perpendicular < 2 x 10(-20) eV (95% C.L.). This first for free neutron. result also interpreted as a direct gravitational dipole moment neutron |gn| 0.3 eV/c2 m spin-dependent interaction with Sun. Analyzing Earth, based previous...
We performed ultracold neutron storage measurements to search for additional losses due (n) mirror-neutron (n′) oscillations as a function of an applied magnetic field B. In the presence mirror B′, would be maximal B≈B′. did not observe any indication nn′ and placed lower limit on oscillation time τnn′>12.0 s at 95% C.L. B′ between 0 12.5 μT.Received 26 May 2009DOI:https://doi.org/10.1103/PhysRevD.80.032003©2009 American Physical Society
We present a method for measuring the magnetic field that allows hyperfine and Zeeman optical pumping, excitation detection of resonance by means single laser beam with time-modulated ellipticity. This improvement us to significantly simplify Bell-Bloom magnetometric scheme, while retaining its sensitivity. The does not require use radio frequency fields, which is essential when creating arrays sensors. results experimental studies demonstrate efficiency proposed potential applicability in...
We present the concept and results of an investigation all-optical vector-magnetic-field sensor scheme developed for biological applications such as nonzero-field magnetoencephalography magnetocardiography. The differs from classical two-beam Bell-Bloom in that detecting laser beam is split into two beams, which are introduced cell orthogonal directions, ratio amplitudes magnetic resonance signals these beams their phase difference measured; strong optical pumping lower hyperfine level...
Magnetic sensors developed for application in magnetoencephalography must meet a number of requirements; the main ones are compactness, sensitivity and response speed. We present quantum optically pumped atomic sensor with cell volume 0.5 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> that meets these requirements is operable nonzero magnetic fields. The ultimate was estimated as (using criteria ratio slope resonance signal to shot...
A new variometer is developed comprising a fast-response scalar optically pumped potassium magnetometer inside rotating magnetic field created by two-dimensional coil system mounted on quartz frame. The measures three components of the Earth's field: total intensity and two transverse components. theoretically predicted accuracy component measurement not worse than 0.1 nT. noise-limited sensitivity measured in quiet has been proved to be 25 pT rms at 0.2 s 30 1 min; comparison with proton...
We present an experimental study of the spectra produced by optical--radio-frequency double resonance in which resonant linearly polarized laser light is used optical pumping and detection processes. show that obtained for cesium are excellent agreement with a very general theoretical model developed our group [Weis, Bison, Pazgalev, Phys. Rev. A 74, 033401 (2006)] we investigate limitations this model. Finally, results discussed view their use relaxation processes aligned alkali-metal vapors.
The effect of isotope shifts nuclear magnetic resonance (NMR) frequency in xenon isotopes <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">129</sup> Xe and xmlns:xlink="http://www.w3.org/1999/xlink">131</sup> polarized by optically-oriented alkali metal atoms is not only fundamental interest, but also practical significance, since it the main factor limiting accuracy a whole class prospective navigation metrological devices. Our study parametric...