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pro vyhledávání: '"Mikheev, Aleksandr N."'
Autor:
Mikheev, Aleksandr N., Noel, Viktoria, Siovitz, Ido, Strobel, Helmut, Oberthaler, Markus K., Berges, Jürgen
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 equilibrium, much less is known about the role of symmetries and their
Externí odkaz:
http://arxiv.org/abs/2407.17913
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 Bijlsma and Stoof [Phys. Rev. A 54, 5085 (1996), see http://doi.org/10.1
Externí odkaz:
http://arxiv.org/abs/2402.19239
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 behavior in space and time. A systematic classification and comprehensive
Externí odkaz:
http://arxiv.org/abs/2304.12464
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 kinetic equation for the momentum occupancy of the scalar field from a no
Externí odkaz:
http://arxiv.org/abs/2212.01163
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 points. The SG model is relevant in many different contexts, from solit
Externí odkaz:
http://arxiv.org/abs/2212.01162
Publikováno v:
Phys. Rev. D 105, 116025 (2022)
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 the Fokker-Planck collision kernel in an adiabatic approximation and sh
Externí odkaz:
http://arxiv.org/abs/2203.02299
Publikováno v:
International Journal of Modern Physics A VOL. 34, NO. 29 (2019)
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 theory derived within a Schwinger-Keldysh closed-time path-integral ap
Externí odkaz:
http://arxiv.org/abs/1810.08143
Publikováno v:
Phys. Rev. A 99, 063622 (2019)
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. We develop a low-energy effective theory of non-thermal fixed points
Externí odkaz:
http://arxiv.org/abs/1807.10228
Publikováno v:
Phys. Rev. Lett. 122, 170404 (2019)
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 scaling in space and time is generically reached at very long evoluti
Externí odkaz:
http://arxiv.org/abs/1807.07514
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