20 citations · 42 across the 7 of their papers we have counts for
7 papers
Nonlinear Spectroscopic Effects in Quantum Gases Induced by Atom-Atom Interactions
Alexander Safonov, Irina Safonova, Igor Yasnikov
We consider nonlinear spectroscopic effects - interaction-enhanced double resonance and spectrum instability - that appear in ultracold quantum gases owing to collisional frequency…
Interaction-enhanced double resonance in cold gases
Alexander Safonov, Irina Safonova, Igor Yasnikov
A new type of double-resonance spectroscopy of a quantum gas based on interaction-induced frequency modulation of a probe transition has been considered. Interstate interaction of…
Comment on "Clock Shift in High Field Magnetic Resonance of Atomic Hydrogen"
A. I. Safonov, I. I. Safonova, I. S. Yasnikov
In this Comment, we reanalyze the experiments on the collision frequency shift of the b-c and a-d hyperfine transitions in three-dimensional atomic hydrogen in the presence of, res…
Low-Temperature Mobility of Surface Electrons and Ripplon-Phonon Interaction in Liquid Helium
A. I. Safonov, I. I. Safonova, S. S. Demukh
The low-temperature dc mobility of the two-dimensional electron system localized above the surface of superfluid helium is determined by the slowest stage of the longitudinal momen…
Hyperfine frequency shift in two-dimensional atomic hydrogen
A. I. Safonov, I. I. Safonova, I. S. Yasnikov
We propose the explanation of a surprisingly small hyperfine frequency shift in the two-dimensional (2D) atomic hydrogen bound to the surface of superfluid helium below 0.1 K. Owin…
Thermal compression of two-dimensional atomic hydrogen to quantum degeneracy
S. Vasilyev, J. Jarvinen, A. I. Safonov +1
We describe experiments where 2D atomic hydrogen gas is compressed thermally at a small "cold spot" on the surface of superfluid helium and detected directly with electron-spin res…