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Updated: May 22, 2026
10:03
The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
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
Summary
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.
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.
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