2022 Fiscal Year Annual Research Report

Anomalous Casimir effect in axion electrodynamics

Research Project

Project/Area Number	20J20974
Research Institution	Keio University
Principal Investigator	QIU Zebin 慶應義塾大学, 自然科学研究教育センター(日吉), 特別研究員(PD)
Project Period (FY)	2020-04-24 – 2023-03-31
Keywords	QCD / Effective Theory / Topology / Chiral Symmetry / Phase Diagram
Outline of Annual Research Achievements	I accomplished two studies on the topological phases of low-energy dense QCD. The first was a magnetized Skyrmion system describing the hadron properties altered by an external magnetic field. Our results hint at the enhancement of the baryonic confinement induced by the magnetic field, in an original approach. The second was a further investigation of a competing mesonic phase (against baryonic phase) under a strong magnetic field, namely the chiral soliton lattice. We innovatively encompass the eta meson into the chiral perturbation theory which was usually in terms of only pions. We found the ground state given such a U(2) field is a mixed soliton lattice or quasicrystal with nontrivial windings of both neutral pion and eta, which could be the first incarnation of a quasicrystal in QCD.
Research Progress Status	令和4年度が最終年度であるため、記入しない。
Strategy for Future Research Activity	令和4年度が最終年度であるため、記入しない。

(4 results)