A5013097901- Atomic and Molecular Physics
- Advanced Chemical Physics Studies
- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Advanced Frequency and Time Standards
- Nuclear physics research studies
- Spectroscopy and Laser Applications
- Astrophysics and Star Formation Studies
- Molecular Spectroscopy and Structure
- Particle physics theoretical and experimental studies
- Atmospheric Ozone and Climate
- Quantum, superfluid, helium dynamics
- Scientific Measurement and Uncertainty Evaluation
- Quantum Chromodynamics and Particle Interactions
- Quantum optics and atomic interactions
- Stellar, planetary, and galactic studies
- Dark Matter and Cosmic Phenomena
- Electron and X-Ray Spectroscopy Techniques
- Laser Design and Applications
- Spectroscopy and Quantum Chemical Studies
- Advanced Physical and Chemical Molecular Interactions
- Radioactive Decay and Measurement Techniques
- High-Energy Particle Collisions Research
- Advanced NMR Techniques and Applications
- X-ray Spectroscopy and Fluorescence Analysis
Saint Petersburg State Electrotechnical University
2016-2025
Petersburg Nuclear Physics Institute
2016-2025
Novosibirsk State University
2004-2024
Kurchatov Institute
2018-2020
University of Delaware
2011-2020
UNSW Sydney
1994-2019
Budker Institute of Nuclear Physics
2004-2017
Institute of Nuclear Physics of Lyon
2016
Foundation for Research and Technology Hellas
2014
University of Crete
2014
This chapter of the report "Flavor in era LHC" Workshop discusses theoretical, phenomenological and experimental issues related to flavor phenomena charged lepton sector conserving CP-violating processes. We review current limits main theoretical models for structure fundamental particles. analyze consequences available data, setting constraints on explicit beyond standard model, presenting benchmarks discovery potential forthcoming measurements both at LHC low energy, exploring options...
Recent developments in frequency metrology and optical clocks have been based on electronic transitions atoms singly charged ions as references. These systems enabled relative uncertainties at a level of few parts $10^{-18}$. This accomplishment not only allows for extremely accurate time measurements, but also to probe our understanding fundamental physics, such variation constants, violation the local Lorentz invariance, forces beyond Standard Model Physics. In addition, novel are driving...
An ab initio method for high accuracy calculations atoms with more than one valence electron is described. The effective Hamiltonian the electrons formed using many-body perturbation theory interaction of core. configuration-interaction then used to find energy levels atom. application this thallium shows that gives an about 0.5% ionization potential and a few tenths percent first intervals. \textcopyright{} 1996 American Physical Society.
Discussion of the parity violation and break time-reversal invariance in diatomic molecules has continued for a number years. Experiments on TlF molecule gave one most stringent limits electric-dipole moment proton T-violating nuclear forces. At present, new generation experiments with paramagnetic is underway. These are aimed mainly at search electron. In this topical review we examine theoretical aspects non-conservation molecules. We focus molecular theory leaving aside part problem....
The aim of the present paper is to analyze a realistic model quantum chaotic system: spectrum and eigenstates rare-earth atom Ce. Using relativistic configuration-interaction method spectra wave functions odd even levels Ce with J=4 are calculated. It shown that structure excited states at excitation energies above 1 eV becomes similar compound in heavy nuclei. superpositions simple basis (with number ``principal'' components N\ensuremath{\sim}100), built 4f, 6s, 5d, 6p single-electron...
Sensitivity to temporal variation of the fundamental constants may be strongly enhanced in transitions between narrow close levels different nature. This enhancement realized a large number molecules due cancellation ground state fine-structure ${\ensuremath{\omega}}_{f}$ and vibrational interval ${\ensuremath{\omega}}_{v}$ [$\ensuremath{\omega}={\ensuremath{\omega}}_{f}\ensuremath{-}n{\ensuremath{\omega}}_{v}\ensuremath{\approx}0$,...
Nuclear spin-dependent parity violation arises from weak interactions between electrons and nucleons nuclear anapole moments. We outline a method to measure such effects, using Stark-interference technique determine the mixing opposite-parity rotational/hyperfine levels of ground-state molecules. The is applicable nuclei over wide range atomic number, in diatomic species that are theoretically tractable for interpretation. This should provide data on moments many previously unmeasured...
We develop a theoretical method within the framework of relativistic many-body theory to accurately treat correlation corrections in atoms with few valence electrons. This combines all-order approach currently used precision calculations properties monovalent configuration-interaction that is applicable for many-electron systems. The applied Mg, Ca, Sr, Zn, Cd, Ba, and Hg evaluate ionization energies low-lying energy levels.
We evaluated the static and dynamic polarizabilities of 5s^2 ^1S_0 5s5p ^3P_0^o states Sr using high-precision relativistic configuration interaction + all-order method. Our calculation explains discrepancy between recent experimental - dc Stark shift measurement \Delta \alpha = 247.374(7) a.u. [Middelmann et. al, arXiv:1208.2848 (2012)] earlier theoretical result 261(4) [Porsev Derevianko, Phys. Rev. A 74, 020502R (2006)]. present value 247.5 is in excellent agreement with result. also...
Recent measurements in paramagnetic molecules improved the limit on electron electric dipole moment (EDM) by an order of magnitude. Time-reversal ($T$) and parity ($P$) symmetry violation may also come from their nuclei. We point out that nuclear $T$, $P$-odd effects are amplified containing deformed nuclei, where primary arise magnetic quadrupole (MQM). perform calculations TaN, ThO, ${\mathrm{ThF}}^{+}$, ${\mathrm{HfF}}^{+}$, YbF, HgF, BaF induced MQMs. compare our results with those for...
We propose 10 highly charged ions as candidates for the development of next generation atomic clocks, quantum information, and search $\ensuremath{\alpha}$ variation. They have long-lived metastable states with transition wavelengths to ground state between 170--3000 nm, relatively simple electronic structure, stable isotopes, high sensitivity variation (e.g., ${\mathrm{Sm}}^{14+}$, ${\mathrm{Pr}}^{10+}$, ${\mathrm{Sm}}^{13+}$, ${\mathrm{Nd}}^{10+}$). predict their properties crucial...
The exchange of spin-0 or spin-1 bosons between fermions spin-polarized macroscopic objects gives rise to various spin-dependent potentials. We derive the coordinate-space nonrelativistic potentials induced by such bosons, including contact terms that can play an important role in atomic-scale phenomena, and correct for errors omissions literature. summarize properties their relevance types experiments. These underpin interpretation experiments search new spectroscopy, torsion-pendulum...
We obtain the limit on space-time variation of ratio proton mass to electron mass, mu=m(p)/m(e), based comparison quasar absorption spectra NH3 with CO, HCO+ and HCN rotational spectra. For inversion transition in (lambda approximately 1.25 cm(-1)) relative frequency shift is significantly enhanced: deltaomega/omega=-4.46deltamu/mu. This enhancement allows one increase sensitivity mu using for high redshift objects. use published data microwave object B0218+357 place deltamu/mu=(0.6+/-1.9) x...
We have calculated the atomic electric dipole moments (EDMs) induced in ${}^{199}\mathrm{Hg},$ ${}^{129}\mathrm{Xe},$ ${}^{223}\mathrm{Rn},$ ${}^{225}\mathrm{Ra},$ and ${}^{239}\mathrm{Pu}$ by their respective nuclear Schiff S. The results are [in units ${10}^{\ensuremath{-}17}S(e{\mathrm{fm}}^{3}{)}^{\ensuremath{-}1}e\mathrm{cm}]:$ ${d(}^{199}\mathrm{Hg})=\ensuremath{-}2.8,$ ${d(}^{129}\mathrm{Xe})=0.38,$ ${d(}^{223}\mathrm{Rn})=3.3,$ ${d(}^{225}\mathrm{Ra})=\ensuremath{-}8.5,$...
We show that three group IIIB divalent ions, B(+), Al(+), and In(+), have anomalously small blackbody radiation (BBR) shifts of the ns(2) (1)S(0)-nsnp (3)P(0)(o) clock transitions. The fractional BBR for these ions are at least 10 times smaller than those any other present or proposed optical frequency standards same temperature, less 0.3% Sr shift. developed a hybrid configuration-interaction + coupled-cluster method provides accurate treatment correlation corrections in such yields...
Many modern theories predict that the fundamental constants depend on time, position, or local density of matter. We develop a spectroscopic method for pulsed beams cold molecules, and use it to measure frequencies microwave transitions in CH with accuracy down 3 Hz. By comparing these those measured from sources Milky Way, we test hypothesis may differ between high low environments Earth interstellar medium. For fine structure constant find \Delta\alpha/\alpha = (0.3 +/- 1.1)*10^{-7},...
The methanol molecule CH3OH has a complex microwave spectrum with large number of very strong lines. This includes purely rotational transitions as well contributions the internal degree freedom associated hindered rotation OH group. latter takes place due to tunneling hydrogen through potential barriers between three equivalent minima. Such are highly sensitive changes in electron-to-proton mass ratio, μ = me/mp, and have different responses μ-variations. highest sensitivity is found for...
We used the monochromatic soft-x-ray beamline P04 at synchrotron-radiation facility PETRA III to resonantly excite strongest $2p-3d$ transitions in neon-like Ni XIX ions, $[2p^6]_{J=0} \rightarrow [(2p^5)_{1/2}\,3d_{3/2}]_{J=1}$ and [(2p^5)_{3/2}\,3d_{5/2}]_{J=1}$, respectively dubbed 3C 3D, achieving a resolving power of 15\,000 signal-to-background ratio 30. obtain their natural linewidths, with an accuracy better than 10\%, as well oscillator-strength $f(3C)/f(3D)$ = 2.51(11) from...
The results of ab initio calculation E1 amplitudes, lifetimes,and polarizabilities for several low-lying levels ytterbium are reported. effective Hamiltonian the valence electrons has been constructed in frame CI+MBPT method and solutions many electron equation found.
We calculated the parity-nonconserving (PNC) 6s-->7s amplitude in Cs. In Dirac-Coulomb approximation our result is good agreement with other calculations. Breit corrections to PNC and Stark-induced beta are found be -0.4% -1%, respectively. The weak charge of 133Cs Q(W) = -72.5+/-0.7 standard model.
The electron wavefunctions for two states of the PbF molecule are calculated. For ground state molecule, tensor components hyperfine interaction valence with nuclear spin Pb, electric and magnetic dipole moments matrix elements P-odd P, T-odd interactions In accordance calculation an effective spin-rotational Hamiltonian is given. includes parity-non-conserving terms external fields. spectrum found to be rather complicated; this connected large anisotropy A tensor. results present work can...
Ultracold molecules offer brand new opportunities to probe the variation of fundamental constants with unprecedented sensitivity. This paper summarizes theoretical background and current constraints on fine structure constant electron-to-proton mass ratio, as well proposals experimental efforts measure variations based ultracold molecules. In particular, we describe two novel spectroscopic schemes that have greatly enhanced sensitivity constants: resonant scattering near Feshbach resonances...