Zobrazeno 1 - 10
of 607
pro vyhledávání: '"Lozovik, Yu E."'
By considering a microscopical model, we derive an evolution equation for single-mode polariton condensate taking into account the fluctuations of the order parameter. We use it to derive an analytical expression for the second order correlation func
Externí odkaz:
http://arxiv.org/abs/2410.11581
Accessing two-photon statistics via Hunbary Brown and Twiss (HBT)-type measurements is essential for investigations of excitonic Bose-condensates. In this paper we make use of quantum hydrodynamics in order to study the finite-size impact on the two-
Externí odkaz:
http://arxiv.org/abs/2409.16771
It is known that the spontaneous time translation symmetry breaking can occur in systems periodically driven at a certain period. We predict a spontaneous breaking of time translation symmetry in an atom-cavity system without external driving, in whi
Externí odkaz:
http://arxiv.org/abs/2401.08824
We predict a stable density-waves-type supersolid phase of a dilute gas of tilted dipolar bosons in a two-dimensional (2D) geometry. This many-body phase is manifested by the formation of the stripe pattern and elasticity coexisting together with the
Externí odkaz:
http://arxiv.org/abs/2312.01716
An ultra-strong coupling regime takes place in a compound system when a coupling strength between the subsystems exceeds one tenth of the system eigenfrequency. It transforms into a deep-strong coupling regime when the coupling strength exceeds the s
Externí odkaz:
http://arxiv.org/abs/2303.18159
In this paper, a non-Markovian Gross-Pitaevskii equation is proposed to describe the formation of a condensate in an exciton-polariton system under incoherent pumping. By introducing spatially delta-correlated noise terms, we observe a transition fro
Externí odkaz:
http://arxiv.org/abs/2212.07152
Publikováno v:
Quantum 7, 1144 (2023)
Bose-condensation in a system of 2D quasiparticles is considered in the scope of a microscopic model. Mean-field dynamical equations are derived with the help of the Schwinger-Keldysh formalism and a simple model is proposed which allows to describe
Externí odkaz:
http://arxiv.org/abs/2209.09710
Publikováno v:
Quantum 7, 982 (2023)
Exceptional point (EP) is a spectral singularity in non-Hermitian systems. The passing over the EP leads to a phase transition, which endows the system with unconventional features that find a wide range of applications. However, the need of using th
Externí odkaz:
http://arxiv.org/abs/2207.01862
Publikováno v:
Journal of Applied Physics; 8/28/2024, Vol. 136 Issue 8, p1-19, 19p
Publikováno v:
Quantum 6, 719 (2022)
The theoretical description of non-equilibrium Bose--Einstein condensate (BEC) is one of the main challenges in modern statistical physics and kinetics. The non-equilibrium nature of BEC makes it impossible to employ the well-established formalism of
Externí odkaz:
http://arxiv.org/abs/2111.09132