| Project/Area Number |
20J20974
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Single-year Grants |
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| Section | 国内 |
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| Review Section |
Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
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| Research Institution | Keio University |
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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)
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| Project Period (FY) |
2020-04-24 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2022: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2021: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2020: ¥900,000 (Direct Cost: ¥900,000)
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| Keywords | QCD / Effective Theory / Topology / Chiral Symmetry / Phase Diagram / Skyrme Model / Chiral Soliton Lattice / Topological Soliton / Casimir Effect / Chiral Anomaly / Axion Electrodynamics |
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| Outline of Research at the Start |
I study novel physical phenomena induced by quantum anomaly. One is the anomalous Casimir effect that refers to the force resulting from quantum fluctuations among the vacuum. In the presence of chiral anomaly, the Casimir force exhibits extraordinary properties such as altering its nature from attraction to repulsion. On the other hand, the curvature and torsion of spacetime also have non-trivial interplay with the chiral anomaly and they generate new type of anomalous currents in chiral systems. I'm devoted to quantifying these effects and revealing their physical significance.
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| 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.
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| Research Progress Status |
令和4年度が最終年度であるため、記入しない。
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| 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。
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