Bridging the gap by shaking superfluid matter

Details Bridging the gap by shaking superfluid matter Bridging the gap by shaking superfluid matter

2011-10-27

arxiv.org/abs/1110.6213v1

Physics

Nuclear Physics

Nuclear Theory

5 pages, 4 figures

Scientific paper

In cold compact stars, Cooper pairing between fermions in dense matter leads to the formation of a gap in their excitation spectrum and typically exponentially suppresses transport properties. However, we show here that weak Urca reactions become strongly enhanced and approach their ungapped level when the star undergoes density oscillations of sufficiently large amplitude. We study both the neutrino emissivity and the bulk viscosity due to direct Urca processes in hadronic, hyperonic and quark matter and discuss different superfluid and superconducting pairing patterns.

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