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We study the non-linear BGK model in 1d coupled to a spatially varying thermostat. We show existence, local uniqueness and linear stability of a steady state when the linear coupling term is large compared to the non-linear self interaction…

偏微分方程分析 · 数学 2023-05-03 Josephine Evans , Angeliki Menegaki

Within a phenomenological holographic model in $(4+1)$-bulk dimensions, defined by Einstein-gravity with a negative cosmological constant, coupled to a Dirac-Born-Infeld and a Chern-Simons term, we explore the fate of BF-bound violation for…

高能物理 - 理论 · 物理学 2017-12-06 Arnab Kundu

We study the holographic field theory dual of a probe SU(2) Yang-Mills field in a background $(4+1)$-dimensional asymptotically Anti-de Sitter space. We find a new ground state when a magnetic component of the gauge field is larger than a…

高能物理 - 理论 · 物理学 2015-06-11 Yan-Yan Bu , Johanna Erdmenger , Jonathan P. Shock , Migael Strydom

We use holography to study the spinodal instability of a four-dimensional, strongly-coupled gauge theory with a first-order thermal phase transition. We place the theory on a cylinder in a set of homogeneous, unstable initial states. The…

高能物理 - 理论 · 物理学 2017-07-05 Maximilian Attems , Yago Bea , Jorge Casalderrey-Solana , David Mateos , Miquel Triana , Miguel Zilhao

A study of two-dimensional QCD on a spatial circle with Majorana fermions in the adjoint representation of the gauge groups SU(2) and SU(3) has been performed. The main emphasis is put on the symmetry properties related to the homotopically…

高能物理 - 理论 · 物理学 2009-10-28 F. Lenz , M. Shifman , M. Thies

The finite temperature transition of QCD can be seen as a change in the structure of the hadrons and as a symmetry breaking transition -- a change in the structure of the vacuum. These phenomena are observed differently and carry…

We analyze the phases of the Sakai-Sugimoto model at finite temperature and baryon chemical potential. Baryonic matter is represented either by 4-branes in the 8-branes or by strings stretched from the 8-branes to the horizon. We find the…

高能物理 - 理论 · 物理学 2009-03-04 Oren Bergman , Gilad Lifschytz , Matthew Lippert

Using effective potential approach for composite operators we have formulated quantum model of the QCD vacuum. It is based on the existence and importance of the nonperturbative $q^{-4}$, topologically nontrivial excitations of the gluon…

高能物理 - 唯象学 · 物理学 2007-05-23 V. Gogohia

Three-dimensional gapless semiconductors with quadratic band touching, such as HgTe, $\alpha$-Sn, or Pr$_2$Ir$_2$O$_7$ are believed to display a non-Fermi-liquid ground state due to long-range electron-electron interaction. We argue that…

强关联电子 · 物理学 2016-04-07 Lukas Janssen , Igor F. Herbut

The linear $SU(2)_L \times SU(2)_R$ sigma-model occupies a unique place in elementary particle physics and quantum field theory. It has been recently realized that when a chemical potential for hypercharge is added, it becomes a toy model…

高能物理 - 唯象学 · 物理学 2009-11-10 V. P. Gusynin , V. A. Miransky , I. A. Shovkovy

We use a quantum Monte Carlo method to study the ground state and thermodynamic phase transitions of the spin supersolid phase in the S=1 Heisenberg model with uniaxial anisotropy. The thermal melting of the supersolid phase shows unqiue…

强关联电子 · 物理学 2009-11-13 P. Sengupta , C. D. Batista

We solve the relativistic Navier-Stokes equations with homogeneous boost-invariant boundary conditions, and perform a stability analysis of the solution. We show that, if the bulk viscosity has a peak around $T_c$ as inferred from QCD-based…

高能物理 - 唯象学 · 物理学 2008-11-26 Giorgio Torrieri , Igor Mishustin

Stochastic electrodynamics is a classical theory which assumes that the physical vacuum consists of classical stochastic fields with average energy $\frac{1}{2}\hbar \omega$ in each mode, i.e., the zero-point Planck spectrum. While this…

量子物理 · 物理学 2017-08-16 Theo M. Nieuwenhuizen , Matthew T. P. Liska

We study the chiral phase transition in a magnetic field at finite temperature and chemical potential within the Sakai-Sugimoto model, a holographic top-down approach to (large-N_c) QCD. We consider the limit of a small separation of the…

高能物理 - 理论 · 物理学 2011-03-18 Florian Preis , Anton Rebhan , Andreas Schmitt

We perform a numerical study of transport properties of a one-dimensional chain with couplings decaying as an inverse power $r^{-(1+\sigma)}$ of the intersite distance $r$ and open boundary conditions, interacting with two heat reservoirs.…

统计力学 · 物理学 2023-09-01 Francesco Andreucci , Stefano Lepri , Stefano Ruffo , Andrea Trombettoni

We prove that nontrivial vacuum states which can arise in hot QCD are associated with the tachyonic regime of hadronic matter fluctuations. This allows us to improve the condition for such states to appear.

高能物理 - 理论 · 物理学 2007-05-23 Fuad M. Saradzhev

We study the equation of state of a strongly interacting theory of relativistic bosons and chiral fermions in the vicinity and above the chiral phase transition temperature. Our model resembles presently used low-energy models of QCD in…

高能物理 - 唯象学 · 物理学 2010-04-06 Jens Braun

Nonintegrable many-body quantum systems typically thermalize at long times through the mechanism of quantum chaos. However, some exceptional systems, such as those harboring quantum scars, break thermalization, serving as testbeds for…

Using the effective potential approach for composite operators we have formulated the quantum model of the QCD vacuum. It is based on the existence and importance of the nonperturbative $q^{-4}$-type dynamical, topologically nontrivial…

高能物理 - 唯象学 · 物理学 2009-10-31 V. Gogohia , H. Toki , T. Sakai , Gy. Kluge

The Kuramoto model is a mean-field model for the synchronisation behaviour of oscillators, which exhibits Landau damping. In a recent work, the nonlinear stability of a class of spatially inhomogeneous stationary states was shown under the…

偏微分方程分析 · 数学 2020-01-14 Helge Dietert