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The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
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Published on: September 30, 2014

Bridging the gap by squeezing superfluid matter.

Mark G Alford1, Sanjay Reddy, Kai Schwenzer

  • 1Department of Physics, Washington University, St. Louis, Missouri 63130, USA.

Physical Review Letters
|May 1, 2012
PubMed
Summary
This summary is machine-generated.

Cooper pairing in dense matter usually suppresses transport. However, large-amplitude density oscillations can strongly enhance Urca reactions, restoring transport properties in nuclear, hyperonic, and quark matter.

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Area of Science:

  • Nuclear Physics
  • Astrophysical Matter Physics
  • Condensed Matter Physics

Background:

  • Cooper pairing in dense matter creates an energy gap, suppressing fermionic excitations and transport.
  • Urca reactions are crucial for energy transport in dense matter but are typically suppressed by pairing gaps.

Purpose of the Study:

  • Investigate the impact of density oscillations on Urca reactions in various dense matter types.
  • Quantify the enhancement of neutrino emissivity and bulk viscosity due to Urca processes under oscillating conditions.

Main Methods:

  • Theoretical analysis of Urca reactions in hadronic, hyperonic, and quark matter.
  • Modeling the effects of large-amplitude density oscillations on fermionic pairing and transport properties.

Main Results:

  • Density oscillations significantly enhance Urca reaction rates, approaching ungapped levels.
  • Neutrino emissivity and bulk viscosity are strongly affected by these oscillations.
  • The enhancement is observed across different matter compositions and pairing patterns.

Conclusions:

  • Dynamic density oscillations can overcome the suppression of transport properties caused by Cooper pairing.
  • Urca processes are robust and can be reactivated in dense matter under specific oscillatory conditions.