S-Wave Scattering Parameters for Positronium-Positronium Interaction and Positronium Bose-Einstein Condensates : Atoms and Molecules

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概要

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• The s-wave scattering parameters for the Positronium-Positronium (Ps-Ps) interaction are estimated semi-phenomenologically with the long-range van der Waals force and the short-range repulsive potential. The obtained values of the scattering length and the effective range are a ~ 0.44nm, and r_0 ~ 0.2nm for the symmetric channel. Stability of them is also checked with two kinds of potential with different parametrizations. Spin coupling schemes for the Ps-Ps system are discussed and the formulae of scattering length for each spin channel are derived. Using this value of the scattering length, the Gross-Pitaevskii equation can be fixed for the Positronium Bose-Einstein condensates (Ps BEC). The static properties of Ps BEC are discussed using the solutions of that equation. The critical temperature shift of the phase-transition due to the Ps-Ps interaction is also evaluated in the mean-field approximation.

• 社団法人日本物理学会の論文
• 2001-06-15

著者

• Suzuki Toru

  Department Of Ubiquitous Preventive Medicine Graduate School Of Medicine The University Of Tokyo

• Tsutsui Satoshi

  Department Of Materials Science And Technology Iwate University

• Ohyama Kiyoshi

  Plant Science Center Riken

• Oda K

  Kyoto Univ. Kyoto Jpn

• Ohyama Kanji

  Div. Appl. Life Sci. Grad. Schl. Agr. Kyoto Univ.

• Ohyama Kanji

  Graduate School Of Biological Sciences Nara Institute Of Science And Technology:laboratory Of Plant

• ODA Kenji

  Department of Hematology and Oncology, Division of Clinical Oncology, Research Institute for Radiati

• Suzuki T

  Department Of Physics Nagoya University

• Oda Kenji

  Department Of Hematology And Oncology

• MIYAKAWA Takahiko

  Department of Physics, Graduate School of Science, University of Tokyo

• YABU Hiroyuki

  Department of Physics, Tokyo Metropolitan University

• 鈴木 徹

  Department Of Physics Tokyo Metropolitan University

• Miyakawa Takahiko

  Department Of Physics Tokyo Metropolitan University

• Miyakawa Takahiko

  Department Of Physics Graduate School Of Science University Of Tokyo:optical Sciences Center Univers

• Ohyama Kanji

  Laboratory Of Plant Molecular Biology Department Of Agricultural Chemistry Faculty Of Agriculture Ky

• Yabu H

  Tokyo Metropolitan Univ.

• Yabu H

  Tokyo Metropolitan Univ. Tokyo Jpn

• Yabu Hiroyuki

  Department Of Physics Kyoto University

• Ohyama Kanji

  Dept.agric.chem. Fac.agric. Kyoto Univ.

• Suzuki Toru

  Department Of Food Science And Technology Tokyo University Of Marine Science And Technology

• Oda Kenji

  Department Of Electronic Engineering Faculty Engineering The University Of Tokushima

• Suzuki Toru

  Department Of Biosphere And Environmental Sciences Faculty Of Environment Systems Rakuno Gakuen Univ

• YABU Hiroyuki

  Institute of Theoretical Physics, University of Regensburg : Research fellow of the Alexander von Humboldt Foundation.

• SUZUKI Toshio

  Research Institute for Fundamental Physics, Kyoto University

• Suzuki Toru

  Department of Applied Electronics, Faculty of Industrial Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan

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