| 研究課題/領域番号 |
19K14713
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| 研究種目 |
若手研究
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| 配分区分 | 基金 |
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| 審査区分 |
小区分15010:素粒子、原子核、宇宙線および宇宙物理に関連する理論
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| 研究機関 | 慶應義塾大学 |
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研究代表者 |
チャッタルジー チャンドラセカール 慶應義塾大学, 自然科学研究教育センター(日吉), 訪問研究員 (40837837)
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| 研究期間 (年度) |
2019-04-01 – 2024-03-31
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| 研究課題ステータス |
交付 (2022年度)
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| 配分額 *注記 |
4,160千円 (直接経費: 3,200千円、間接経費: 960千円)
2022年度: 780千円 (直接経費: 600千円、間接経費: 180千円)
2021年度: 780千円 (直接経費: 600千円、間接経費: 180千円)
2020年度: 910千円 (直接経費: 700千円、間接経費: 210千円)
2019年度: 1,690千円 (直接経費: 1,300千円、間接経費: 390千円)
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| キーワード | Aharonov-Bohm phase / Alice strings / vortices / domain walls / topological solitons / cosmic strings / supersymmetry / superconductors / gauge theory / QCD / Beyond Standard Model / nuclear matter / dense QCD / neutron superfluidity |
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| 研究開始時の研究の概要 |
An Alice string has a non-trivial topological property that charged particles flip the sign of the electric charge after encircling the Alice string once, and consequently the charge is not globally defined. Recently we proposed a BPS construction of Alice string and constructed a BPS-saturated Alice string in U(1)x SO(3) gauge theory with charged complex scalar fields belonging to the vector representation. After performing Bogomol'nyi completion we solved the BPS equations numerically and embeded it into an N = 1 supersymmetric gauge theory.
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| 研究実績の概要 |
We have discussed what happens when a field that receives an Aharonov-Bohm (AB) phase develops a vacuum expectation value (VEV), using the example of an Alice string in a U(1)×SU(2) gauge theory coupled with complex triplet scalar fields. We have introduced scalar fields belonging to the doublet representation of SU(2), charged or chargeless under the U(1) gauge symmetry, that receives an AB phase around the Alice string. When the doublet develops a VEV, the Alice string becomes a global string in the absence of the interaction depending on the relative phase between the doublet and triplet, while in the presence of such an interaction the Alice string is confined by a soliton or domain wall, and therefore the spatial rotation around the string is spontaneously broken.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
I have discussed an application of this work to confinement of vortices, and applied to dense QCD.
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| 今後の研究の推進方策 |
We will apply our mechanism to the 2-flavor dense QCD.
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