Screening effects in plasma with charged Bose condensate

Dolgov, A. D.; Lepidi, Angela; Piccinelli, Gabriella

doi:10.1103/physrevd.80.125009

Cited by 17 publications

(35 citation statements)

References 31 publications

(68 reference statements)

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“…This coincides with the dispersion relations for the zero sound mode found in (17). Unlike in the previous Subsection, however, a solution also exists in the opposite limit, x 1: indeed, assuming that x 1, one gets Π m …”

Section: A More Realistic Modelsupporting

confidence: 55%

Field theory for zero sound and ion acoustic wave in astrophysical matter

Gabadadze

Rosen

2016

Phys. Rev. D

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We set up a field theory model to describe the longitudinal low energy modes in high density matter present in white dwarf stars. At the relevant scales, ions -the nuclei of oxygen, carbon and helium -are treated as heavy point-like spin-0 charged particles in an effective field theory approach, while the electron dynamics is described by the Dirac Lagrangian at the one-loop level. We show that there always exists a longitudinal gapless mode in the system irrespective whether the ions are in a plasma, crystal, or quantum liquid state. For certain values of the parameters, the gapless mode can be interpreted as a zero sound mode and, for other values, as an ion acoustic wave; we show that the zero sound and ion acoustic wave are complementary to each other. We discuss possible physical consequences of these modes for properties of white dwarfs.

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Section: A More Realistic Modelsupporting

confidence: 55%

Field theory for zero sound and ion acoustic wave in astrophysical matter

Gabadadze

Rosen

2016

Phys. Rev. D

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“…This leads to the surprising conclusion that contact interactions due to nuclear forces may compete with dipole-dipole interactions between the deuterons. A very similar situation involving dipole-dipole interactions occurs in the physics of W boson condensation in the early Universe [19]. There the W boson contact interactions are fixed by gauge symmetry and are known to favor the ferromagnetic phase.…”

Section: Symmetries Of the Deuteron Liquidmentioning

confidence: 92%

The phases of deuterium at extreme densities

Bedaque

Buchoff

Cherman

2011

J. High Energ. Phys.

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We consider deuterium compressed to higher than atomic, but lower than nuclear densities. At such densities deuterium is a superconducting quantum liquid. Generically, two superconducting phases compete, a "ferromagnetic" and a "nematic" one. We provide a power counting argument suggesting that the dominant interactions in the deuteron liquid are perturbative (but screened) Coulomb interactions. At very high densities the ground state is determined by very small nuclear interaction effects that probably favor the ferromagnetic phase. At lower densities the symmetry of the theory is effectively enhanced to SU (3), and the quantum liquid enters a novel phase, neither ferromagnetic nor nematic. Our results can serve as a starting point for investigations of the phase dynamics of deuteron liquids, as well as exploration of the stability and dynamics of the rich variety of topological objects that may occur in phases of the deuteron quantum liquid, which range from Alice strings to spin skyrmions to Z2 vortices.

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“…This process is expected to imply non-trivial interactions before decoupling in the radiation epoch (Dolgov et al 2009). However, this is out of the scope of the present paper and for that reason it is left for future work.…”

Section: Discussionmentioning

confidence: 99%

Ultra Light Bosonic Dark Matter and Cosmic Microwave Background

Rodríguez‐Montoya

Magaña

Matos

et al. 2010

ApJ

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In this paper, we consider the hypothesis in which a species of ultra light bosonic dark matter (ULBDM) with mass m B ∼ 10 −22 eV could be the dominant dark matter (DM) in the universe. As a first approach we work in the context of kinetic theory, where ULBDM is described by the phase space distribution function whose dynamics is dictated by the Boltzmann-Einstein equations. We investigate the effects that this kind of DM imprints in the acoustic peaks of the cosmic microwave background. We find that the effect of the Bose-Einstein statistics is small, albeit perceptible, and is equivalent to an increase of nonrelativistic matter. It is stressed that in this approach, the mass-to-temperature ratio necessary for ULBDM to be a plausible DM candidate is about five orders of magnitude. We show that reionization is also necessary and we address a range of consistent values for this model. We find that the temperature of ULBDM is below the critical value implying that Bose-Einstein condensation is inherent to the ULBDM paradigm.

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Screening effects in plasma with charged Bose condensate

Cited by 17 publications

References 31 publications

Field theory for zero sound and ion acoustic wave in astrophysical matter

Field theory for zero sound and ion acoustic wave in astrophysical matter

The phases of deuterium at extreme densities

Ultra Light Bosonic Dark Matter and Cosmic Microwave Background

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