Symmetries and Ultra Dense Matter of Compact Stars II: Emergence of Symmetries in Strong Nuclear Correlations
A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Physics".
Deadline for manuscript submissions: 31 December 2025 | Viewed by 8439
Special Issue Editors
Interests: theoretical nuclear; hadron physics
Special Issues, Collections and Topics in MDPI journals
Interests: high energy particle physics; nuclear physics
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
In shifting from dilute baryonic systems to superdense astrophysical systems on the verge of gravitational collapse, ranging from few-nucleon nuclei to infinite nuclear matter and superdense compact star matter, in the pursuit of strong interaction QCD with its UV completion, one would move from a pionless effective theory with only nucleons to a chiral effective field theory with both nucleons and pions. This provides stunningly simple proof of Weinberg’s “Folk Theorem” on EFT, which remains valid until the latter breaks down at densities near n_{cross-over}~ (2–3) times the normal nuclear matter density n_0. The scale for the breakdown is the mass of the lowest vector mesons ρ and ω identified as the (hidden) local fields and that of the dilaton D as the (hidden) scale field. At this scale, it is futile to attempt to precisely identify their microscopic structure in terms of the QCD variables. Hence, this cross-over regime is currently an almost entirely uncharted domain and will be addressed in the Special Issue by confronting the astrophysical observables coming from gravity waves, among other associated concepts. The theoretical approach will involve various hidden symmetries, some explicitly associated with the gauge theory QCD but more likely emergent in the strong intricate fermionic (nuclear and/or constituent quark) correlations involving the relevant hadron degrees of freedom in the background of a sliding vacuum. The relevant topics are highlighted in the keywords; they promise to be rich in surprises, not always ensuing from the inherent symmetries of QCD proper but possibly resembling what is taking place in condensed matter systems. The theoretical strategy requires both bottom–up and top–down approaches to the topology changes between solitons, quantum Hall droplets, Fermi liquids, and non-Fermi liquids, etc., moving across the cross-over density.
Prof. Dr. Mannque Rho
Prof. Dr. Chihiro Sasaki
Guest Editor
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Keywords
- superdense matter
- topology changes
- baryon parity-doublet symmetry
- Cheshire cat mechanism
- hadron-quark duality
- emergent hidden symmetries
- Weinberg’s folk theorem
- generalized Hohenberg-Kohn density functional
- Landau–Migdal Fermi liquid
- un-Fermi liquids
- speed of sound
- conformal symmetry
- color superconductivity
- neutron superfluidity
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