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Why does graphene behave as a weakly interacting system?
This work addresses the puzzling weak-coupling perturbative behavior of graphene interaction effects as manifested experimentally by calculating the effect of Coulomb interactions on the quasiparticle properties to next-to-leading order in the random phase approximation (RPA).
Quantum anomaly, universal relations, and breathing mode of a two-dimensional Fermi gas.
It is shown that the classical SO(2,1) symmetry of a harmonically trapped Fermi gas in two dimensions is broken by quantum effects and the virial theorem for the system and a universal relation for the pressure of a homogeneous gas is derived.
High-temperature expansion of the viscosity in interacting quantum gases
The frequency-dependent shear and bulk viscosity spectral functions of an interacting Fermi gas at high temperature are computed using a systematic virial expansion of the stress tensor correlation
Optical evidence for a Weyl semimetal state in pyrochlore Eu 2 Ir 2 O 7
A Weyl semimetallic state with pairs of nondegenerate Dirac cones in three dimensions was recently predicted to occur in the antiferromagnetic state of the pyrochlore iridates. Here, we show that the
Surface plasmon polaritons in topological Weyl semimetals
We consider theoretically surface plasmon polaritons in Weyl semimetals. These materials contain pairs of band touching points - Weyl nodes - with a chiral topological charge, which induces an
Many-body effects and ultraviolet renormalization in three-dimensional Dirac materials
We develop a theory for electron-electron interaction-induced many-body effects in three dimensional (3D) Weyl or Dirac semimetals, including interaction corrections to the polarizability, electron
Coarsening dynamics of binary Bose condensates.
We study the dynamics of domain formation and coarsening in a binary Bose-Einstein condensate that is quenched across a miscible-immiscible phase transition. The late-time evolution of the system is
Current response, structure factor and hydrodynamic quantities of a two- and three-dimensional Fermi gas from the operator product expansion
We apply the operator-product expansion to determine the asymptotic form of the current response of a Fermi gas in two and three dimensions. The leading-order term away from the one-particle peak is
Plasmon signature in Dirac-Weyl liquids
We consider theoretically as a function of temperature the plasmon mode arising in three-dimensional Dirac liquids, i.e., systems with linear chiral relativistic single-particle dispersion, within