Study on many-body effects and frustrated magnetic superfluids of multicomponent ultracold atomic gases

2017 Fiscal Year Final Research Report

• Project/Area Number: 26287088
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Atomic/Molecular/Quantum electronics
• Research Institution: The University of Tokyo
• Principal Investigator: Masahito Ueda 東京大学, 大学院理学系研究科(理学部), 教授 (70271070)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 冷却原子気体 / 磁性超流動 / フラストレーション

Outline of Final Research Achievements

In spinor Bose-Einstein condensates, it is pointed out that an emergent energy gap exceeds the zero-point energy of the system by a factor of one hundred and it is thus experimentally observable. In Efimov effects, the discrete scaling invariance is shown to be closely related to the limit cycle of the renormalization group. In unitary gases, Tan’s contact is generalized to the p-wave case. In frustrating magnetism, geometrical frustration is shown to stabilize a metastable state and the coarsening dynamics obeys scaling with Z2 topological excitations being created in the process. Finally, anomalous transport through a quantum point contact of ultracold atoms is theoretically clarified.

Free Research Field

物理学