Abstract
We analyze the behavior of quarks coupled to a gauge theory in dimensions. In the limit of strong coupling, the model reduces to a Wess-Zumino-Novikov-Witten (WZNW) model. At nonzero density, excitations near the Fermi surface form a non-Fermi liquid. With flavors, the finite density of quarks reduce to a free field, which governs fluctuations in baryon number, together with a WZNW nonlinear sigma model at level , from the pion/kaon modes. We compute the singularity in the charge susceptibility at the Fermi surface and the attendant power-law correlations. We suggest that this is relevant to the quarkyonic regime of cold, dense QCD in () dimensions, in the limit that the Fermi surface is covered by many small patches, and the theory is effectively one dimensional. In this regime the dominant excitations near the Fermi surface are not baryons, but gapless bosonic modes.
2 More- Received 22 December 2021
- Accepted 4 February 2022
DOI:https://doi.org/10.1103/PhysRevD.105.054035
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society