A Model for Conservative Chaos Constructed from Multicomponent Bose-Einstein Condensates with a Trap in Two Dimensions
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- Yamasaki Hisatsugu
- Department of Applied Physics, Osaka City University
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- Natsume Yuhei
- Graduate School of Science and Technology, Chiba University
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- Nakamura Katsuhiro
- Department of Applied Physics, Osaka City University
書誌事項
- タイトル別名
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- Model for Conservative Chaos Constructed from Multicomponent Bose Einstein Condensates with a Trap in Two Dimensions
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To elucidate the mechanism leading to the breakdown of a particle picture for multicomponent Bose–Einstein condensates (BECs) with a harmonic trap in high dimensions, we investigate the corresponding two-dimensional nonlinear Schrödinger equation (Gross–Pitaevskii equation) using a modified variational principle. A molecule of two identical Gaussian wave packets has two degrees of freedom (DFs): the separation of center of masses and the wave-packet width. Without intercomponent interaction (ICI), these DFs show independent regular oscillations with degenerate eigenfrequencies. The inclusion of ICI strongly mixes these DFs, generating a fat mode that breaks the particle picture, which, however, can be recovered by introducing a time-periodic ICI with zero average. In the case of a molecule of three wave packets for a three-component BEC, the increase of the ICI amplitude yields a transition from regular to chaotic oscillations in wave-packet breathing.
収録刊行物
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 74 (7), 1887-1890, 2005
一般社団法人 日本物理学会
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詳細情報 詳細情報について
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- CRID
- 1390282679164795904
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- NII論文ID
- 110001979632
- 210000105519
- 130004539317
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- NII書誌ID
- AA00704814
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- BIBCODE
- 2005JPSJ...74.1887Y
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 7356729
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 使用不可