487 citations · 1.6k across the 12 of their papers we have counts for
12 papers
Influence of Cooper pairing on the inelastic processes in a gas of Fermi atoms
V. S. Babichenko, Yu. Kagan
Correlation properties in ultracold Fermi gas with negative scattering length and its impact on the three-body recombination is analyzed. We find that Cooper pairing enhances the r…
The nonlinear damping of Bose-Einstein condensate oscillations at ultra-low temperatures
Yu. Kagan, L. A. Maksimov
We analyze the damping of the transverse breathing mode in an elongated trap at ultralow temperatures. The damping occurs due to the parametric resonance entailing the energy trans…
Manifestation of superfluidity in an evolving Bose-condensed gas
Yu. Kagan, L. A. Maksimov
We study the generation of excitations due to an ''impurity''(static perturbation) placed into an oscillating Bose-condensed gas in the time-dependent trapping field. It is shown t…
The spectral properties of non-condensate particles in Bose-condensed atomic hydrogen
Yu. Kagan, A. E. Muryshev
The strong spin-dipole relaxation, accompanying BEC in a gas of atomic hydrogen, determines the formation of a quasistationary state with a flux of particles in energy space to the…
Supercurrent Stability in a Quasi-1D Weakly Interacting Bose Gas
Yu. Kagan, N. V. Prokof'ev, B. V. Svistunov
We discuss a possibility of observing superfluid phenomena in a quasi-1D weakly interacting Bose gas at finite temperatures. The weakness of interaction in combination with generic…
The Rotational Structure of Molecules In the Quantum He4 and He3 Liquids
V. S. Babichenko, Yu. Kagan
It is shown that the drastic distinction in the rotational structure of molecules in the He4 and He3 liquids observed in [1] is due to the difference in the spectral density of exc…
Collapse and Bose-Einstein condensation in a trapped Bose-gas with negative scattering length
Yu. Kagan, A. E. Muryshev, G. V. Shlyapnikov
We find that the key features of the evolution and collapse of a trapped Bose condensate with negative scattering length are predetermined by the particle flux from the above-conde…
Evolution of Correlation Properties and Appearance of Broken Symmetry in the Process of Bose-Einstein Condensation
Yu. Kagan, B. V. Svistunov
We consider the self-evolution of strongly non-equilibrium interacting Bose gas. Due to the mere fact of large (as compared to unity) occupation numbers in the initial state the pr…
Evolution and global collapse of trapped Bose condensates under variations of the scattering length
U. Kagan, E. L. Surkov, G. V. Shlyapnikov
We develop the idea of selectively manipulating the condensate in a trapped Bose-condensed gas, without perturbing the thermal cloud. The idea is based on the possibility to modify…
Interplay between Heavy Fermions and Crystal Field Excitation in Kondo Lattices. Low-Temperature Thermodynamics and Inelastic Neutron Scattering Spectra of CeNiSn
Yu. Kagan, K. A. Kikoin, A. S. Mishchenko
The microscopic theory of interaction between the heavy fermions and the crystal field excitations in Kondo lattices is presented. It is shown that the heavy-fermion spectrum scale…
Evolution of a Bose-condensed gas under variations of the confining potential
Yu. Kagan, E. L. Surkov, G. V. Shlyapnikov
We discuss the dynamic properties of a trapped Bose-condensed gas under variations of the confining field and find analytical scaling solutions for the evolving coherent state (con…
Influence of nearly resonant light on the scattering length in low-temperature atomic gases
P. O. Fedichev, Yu. Kagan, G. V. Shlyapnikov +1
We develop the idea of manipulating the scattering length in low-temperature atomic gases by using nearly resonant light. As found, if the incident light is close to resonance…