Topological Excitations in Spinor Bose-Einstein Condensates(QCD Phase Diagram,New Frontiers in QCD 2010-Exotic Hadron Systems and Dense Matter-)

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概要

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• A rich variety of order parameter manifolds of multicomponent Bose-Einstein condensates (BECs) admit various kinds of topological excitations, such as fractional vortices, monopoles, skyrmions, and knots. In this paper, we discuss two topological excitations in spinor BECs: non-Abelian vortices and knots. Unlike conventional vortices, non-Abelian vortices neither reconnect themselves nor pass through each other, but create a rung between them in a topologically stable manner. We discuss the collision dynamics of non-Abelian vortices in the cyclic phase of a spin-2 BEC. In the latter part, we show that a knot, which is a unique topological object characterized by a linking number or a Hopf invariant [π_3(S^2)=Z], can be created using a conventional quadrupole magnetic field in a cold atomic system.

• 2010-12-17

著者

• KAWAGUCHI Yuki

  Department of Physics, Graduate School of Science, Kyoto University

• Kawaguchi Yuki

  Department Of Food Science And Nutrition Nara Women's University

• Ueda Masahito

  Department of physics, University of Tokyo

• Kawaguchi Yuki

  Department Of Physics University Of Tokyo

• NITTA Muneto

  Department of Physics, Graduate School of Science, Osaka University

• Nitta Muneto

  Department Of Physics And Research And Education Center For Natural Sciences Keio University

• Nitta Muneto

  Tokyo Inst. Tech.

• Nitta Muneto

  Department Of Physics Purdue University:(present Address)department Of Physics Tokyo Institute Of Te

• Ueda Masahito

  Department Of Physics The University Of Tokyo

• KOBAYASHI Michikazu

  Department of Basic Science, Graduate School of Arts and Sciences, University of Tokyo

• Kobayashi Michikazu

  Department Of Basic Science The University Of Tokyo

• Ueda Masahito

  Department Of Physical Electronics Hiroshima University:core Research For Evolutional Science And Te

• KAWAGUCHI Yuki

  Department of Physics, University of Tokyo

• UEDA Masahito

  Department of Physics, The University of Tokyo

• UEDA Masahito

  Department of Mechanical Engineering, College of Science and Technology, Nihon University

関連論文

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• Stability of Magnetically Trapped Bose-Einstein Condensates (Condensed Matter: Structure, Mechanical and Thermal Properties)
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