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Superfluid phase transitions in dense neutron matter.
V A Khodel1, J W Clark, M V Zverev
1McDonnell Center for the Space Sciences and Department of Physics, Washington University, St. Louis, Missouri 63130, USA.
Physical Review Letters
|July 20, 2001
Summary
Researchers explored phase transitions in dense neutron matter, a system with triplet pairing. They discovered ten new multicomponent solutions, with transitions occurring between phases exhibiting nodeless order parameters.
Area of Science:
- Nuclear Physics
- Condensed Matter Physics
- Quantum Materials
Background:
- Dense neutron matter is a key component of neutron stars.
- Understanding its superfluid properties, particularly triplet pairing, is crucial for astrophysics.
- The 3P2-3F2 model is a suitable framework for describing pairing in this system.
Purpose of the Study:
- To investigate the phase transitions in dense neutron matter with triplet pairing.
- To analytically construct the spectrum of phases within the 3P2-3F2 model.
- To identify and characterize different types of order parameters and their transitions.
Main Methods:
- Analytical construction of the phase spectrum using a separation method.
- Solving Bardeen-Cooper-Schrieffer (BCS) gap equations for arbitrary angular momentum states.
- Characterization of angle-dependent order parameters, including nodal and nodeless solutions.
Main Results:
- Identified ten real multicomponent solutions for the pairing phases.
- Found five order parameters with nodes and five without.
- Observed transitions exclusively between phases with nodeless order parameters.
Conclusions:
- The study provides a comprehensive analytical description of phase transitions in dense neutron matter.
- The findings reveal a unique behavior of phase transitions, differing from superfluid Helium-3.
- This work contributes to a deeper understanding of the exotic phases of matter under extreme conditions.