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8 papers · 1 filter
Transition frequency shifts with fine-structure constant variation for Yb II
S. G. Porsev, V. V. Flambaum, J. R. Torgerson
In this paper we report calculations of the relativistic corrections to transition frequencies (q factors) of Yb II for the transitions from the odd-parity states to the metastable…
Calculation of P,T-odd electric dipole moments for diamagnetic atoms Xe, Yb, Hg, Rn, and Ra
V. A. Dzuba, V. V. Flambaum, S. G. Porsev
Electric dipole moments of diamagnetic atoms of experimental interest are calculated using the relativistic Hartree-Fock and random-phase approximation methods, the many-body pertu…
Magic frequencies for cesium primary frequency standard
V. V. Flambaum, V. A. Dzuba, A. Derevianko
We consider microwave hyperfine transitions in the ground state of cesium and rubidium atoms which are presently used as the primary and the secondary frequency standards. The atom…
Micromagic clock: microwave clock based on atoms in an engineered optical lattice
K. Beloy, A. Derevianko, V. A. Dzuba +1
We propose a new class of atomic microwave clocks based on the hyperfine transitions in the ground state of aluminum or gallium atoms trapped in optical lattices. For these element…
New Limits on Coupling of Fundamental Constants to Gravity Using Sr Optical Lattice Clocks
S. Blatt, A. D. Ludlow, G. K. Campbell +13
The - clock transition frequency in neutral Sr has been measured relative to the Cs standard by three independent laboratories…
Production of high energy particles in laser and Coulomb fields and e^+e^- antenna
M. Yu. Kuchiev
A strong laser field and the Coulomb field of a nucleus can produce e^{+}e^{-} pairs. It is shown for the first time that there is a large probability that electrons and positrons…