High-frequency crossover from vortex-mass enhancement to pinning.

Starting from lattice dynamics, Ginzburg Landau Theory is used to study phonon contributions to the effective vortex mass of a moving Abrikosov lattice driven by a small driving force, in this case circularly polarized light. A general expression is obtained of dynamical additional mass, which is capable of including both acoustic and optical phonon contributions. At the level of linear response, this frequency-dependent mass increases with driving frequency.

Mass of Abrikosov vortex in high-temperature superconductor YBa[Formula: see text]Cu[Formula: see text]O[Formula: see text].

For more than four decades, mass of Abrikosov vortices defied experimental observations. We demonstrate a method of its detection in high-temperature superconductors. Similarly to electrons, fluxons circulate in the direction given by the magnetic field, causing circular dichroism.

Local conservation laws in ultracold Fermi systems with time-dependent interaction potential.

In the context of an ultracold Fermi gas, we derive conservation laws for mass, energy and momentum based on a generalized nonlocal Boltzmann equation with gradient corrections in the collision integral. The corrections are expressed in terms of effective collision duration, particle displacement and changes of total momentum and energy. Their origin is in the in-medium T matrix.

Comment on "Nonequilibrium thermodynamics with binary quantum correlations".

The article [Phys. Rev. E 96, 032106 (2017)10.

Space-time versus particle-hole symmetry in quantum Enskog equations.

The nonlocal scattering-in and scattering-out integrals of the Enskog equation have reversed displacements of colliding particles reflecting that the scattering-in and -out processes are conjugated by the space and time inversions. Generalizations of the Enskog equation to Fermi liquid systems are hindered by the need for particle-hole symmetry which contradicts the reversed displacements. We resolve this problem with the help of the optical theorem.