44 citations · 158 across the 9 of their papers we have counts for
9 papers
Extracting the symmetries of nonequilibrium quantum many-body systems
Aleksandr N. Mikheev, Viktoria Noel, Ido Siovitz +3
Symmetries play a pivotal role in our understanding of the properties of quantum many-body systems. While there are theorems and a well-established toolbox for systems in thermal e…
Bogoliubov phonons in a Bose-Einstein condensate from the one-loop perturbative renormalization group
Niklas Rasch, Aleksandr N. Mikheev, Thomas Gasenzer
Wilson's renormalization-group approach to the weakly-interacting single-component Bose gas is discussed within the symmetry-broken, condensate phase. Extending upon the work by Bi…
Universal dynamics and non-thermal fixed points in quantum fluids far from equilibrium
Aleksandr N. Mikheev, Ido Siovitz, Thomas Gasenzer
Closed quantum systems far from thermal equilibrium can show universal dynamics near attractor solutions, known as non-thermal fixed points, generically in the form of scaling beha…
Non-thermal fixed points of universal sine-Gordon coarsening dynamics
Philipp Heinen, Aleksandr N. Mikheev, Christian-Marcel Schmied +1
We examine coarsening of field-excitation patterns of the sine-Gordon (SG) model, in two and three spatial dimensions, identifying it as universal dynamics near non-thermal fixed p…
Anomalous scaling at non-thermal fixed points of the sine-Gordon model
Philipp Heinen, Aleksandr N. Mikheev, Thomas Gasenzer
We extend the theory of non-thermal fixed points to the case of anomalously slow universal scaling dynamics according to the sine-Gordon model. This entails the derivation of a kin…
Stability analysis of non-thermal fixed points in longitudinally expanding kinetic theory
Aleksandr N. Mikheev, Aleksas Mazeliauskas, Jürgen Berges
We use the Hamiltonian formulation of kinetic theory to perform a stability analysis of non-thermal fixed points in a non-Abelian plasma. We construct a perturbative expansion of t…
Non-thermal fixed points: Universal dynamics far from equilibrium
Christian-Marcel Schmied, Aleksandr N. Mikheev, Thomas Gasenzer
In this article we give an overview of the concept of universal dynamics near non-thermal fixed points in isolated quantum many-body systems. We outline a non-perturbative kinetic…
Low-energy effective theory of non-thermal fixed points in a multicomponent Bose gas
Aleksandr N. Mikheev, Christian-Marcel Schmied, Thomas Gasenzer
Non-thermal fixed points in the evolution of a quantum many-body system quenched far out of equilibrium manifest themselves in a scaling evolution of correlations in space and time…
Prescaling in a far-from-equilibrium Bose gas
Christian-Marcel Schmied, Aleksandr N. Mikheev, Thomas Gasenzer
Non-equilibrium conditions give rise to classes of universally evolving configurations of quantum-many body systems at non-thermal fixed points. While the fixed point and thus full…