12,583 research outputs found
Chromomagnetic Instability and Induced Magnetic Field in Neutral Two-Flavor Color Superconductivity
We find that the chromomagnetic instability existing in neutral two- flavor
color superconductivity at moderate densities is removed by the formation of an
inhomogeneous condensate of charged gluons and the corresponding induction of a
magnetic field. It is shown that this inhomogeneous ground state is
energetically favored over a homogeneous one. The spontaneous induction of a
magnetic field in a color superconductor at moderate densities can be of
interest for the astrophysics of compact stellar objects exhibiting strong
magnetic fields as magnetars.Comment: Version to appear in PR
Magnetic Response in Anyon Fluid at High Temperature
The magnetic response of the charged anyon fluid at temperatures lower and
larger than the fermion enery gap is investigated in the
self-consistent field approximation. We prove that the anyon system with
boundaries exhibits a total Meissner effect at temperatures smaller than the
fermion energy gap (). The London penetration length at
is of the order . At a
new phase, characterized by an inhomogeneous magnetic penetration, is found. We
conclude that the energy gap, defines a scale that separates two
phases: a superconducting phase at , and a non-superconducting
one at .Comment: 7 pages, Talk presented at SILAFAE'98. April 8-11, 1998, San Juan,
Puerto Ric
Novel Topological Effects in Dense QCD in a Magnetic Field
We study the electromagnetic properties of dense QCD in the so-called
Magnetic Dual Chiral Density Wave phase. This inhomogeneous phase exhibits a
nontrivial topology that comes from the fermion sector due to the asymmetry of
the lowest Landau level modes. The nontrivial topology manifests in the
electromagnetic effective action via a chiral anomaly term , with a dynamic axion field given by the
phase of the dual chiral density wave condensate. The coupling of the axion
with the electromagnetic field leads to several macroscopic effects that
include, among others, an anomalous, nondissipative Hall current, an anomalous
electric charge, magnetoelectricity, and the formation of a hybridized
propagating mode known as an axion polariton. Connection to topological
insulators and Weyls semimetals, as well as possible implications for heavy-ion
collisions and neutron stars are all highlighted.Comment: Section 3 completely revised, discussions added, and typos correcte
Effects of Bose-Einstein Condensation on forces among bodies sitting in a boson heat bath
We explore the consequences of Bose-Einstein condensation on
two-scalar-exchange mediated forces among bodies that sit in a boson gas. We
find that below the condensation temperature the range of the forces becomes
infinite while it is finite at temperatures above condensation.Comment: 10 pages, 2 figure
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