Drag dynamics in one-dimensional Fermi systems

• Ozaki, Jun'ichi

• Tezuka, Masaki

• 川上, 則雄

抄録

We study drag dynamics of several fermions in a fermion cloud in one-dimensional continuous systems, with particular emphasis on the nontrivial quantum many-body effects in systems whose parameters change gradually in real time. We adopt the Fermi-Hubbard model and the time-dependent density-matrix renormalization group (DMRG) method to calculate the drag force on a trapped fermion cluster in a cloud of another fermion species with contact interaction. The simulation result shows that a nontrivial peak in the resistance force is observed in the high-cloud-density region, which implies a criterion of effective ways in diffusive transport in a fermion cloud. We compare the DMRG simulation result with a mean-field result, and it is suggested that some internal degrees of freedom have a crucial role in the excitation process when the cloud density is high. This work emphasizes the difference between the full-quantum calculation and the semiclassical calculation, which is the quantum effects, in slow dynamics of many-body systems bound in a fermion cloud.

収録刊行物

• Physical Review A

  Physical Review A 92 (2), 2015-08-07

  American Physical Society

キーワード

• Atomic and Molecular Physics, and Optics

詳細情報

• CRID: 1050282810795480448
• NII論文ID: 120005674642
• NII書誌ID: AA10764867
• ISSN: 10502947
• ISSN: 10941622
• DOI: 10.1103/physreva.92.023607
• HANDLE: 2433/202046
• Web Site: http://link.aps.org/article/10.1103/PhysRevA.92.023607
• Web Site: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevA.92.023607/fulltext
• 本文言語コード: en
• 資料種別: journal article
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