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Polaron in Bose-Einstein-Condensation System |
| HUANG Bei-Bing, WAN Shao-Long |
| Institute for Theoretical Physics and Department of Modern Physics University of Science and Technology of China, Hefei 230026 |
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HUANG Bei-Bing, WAN Shao-Long 2009 Chin. Phys. Lett. 26 080302 |
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Abstract We consider the motion of an impurity in a Bose-Einstein condensate system at T=0K with the contact interactions for boson-boson and boson-impurity. Under the forward-scattering approximation, we obtain a Frohlich-like Hamiltonian for this system, which means that a polaron can be formed. The effective mass, the phonon number and the energy to form a polaron are obtained. We also discuss the validity of the forward-scattering approximation for this system.
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| Keywords:
03.75.Hh
05.30.Jp
67.85.Bc
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Received: 14 May 2009
Published: 30 July 2009
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| PACS: |
03.75.Hh
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(Static properties of condensates; thermodynamical, statistical, and structural properties)
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05.30.Jp
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(Boson systems)
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67.85.Bc
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(Static properties of condensates)
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