报告题目: |
Two-body scattering in a unitary gas: anomalous phase shifts and dimers |
报告人: |
Junliang Song |
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Institute of Quantum Optics and
Quantum Information of Austrian Academy of Sciences,
Innsbruck, Austria
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报告时间: |
2011-09-16 15:00 |
报告地点: |
清华大学高等研究院 科学馆322报告厅 |
主办单位: |
高等研究院 |
简介: |
Few-body scattering plays an important role in the low energy properties of quantum gases. In a many-body system, two-body scattering properties can be significantly modified by the medium. We show that in a unitary gas of Fermi-Fermi mixtures, anomalous scattering phase shifts and quasi-dimers with negative masses can appear, as a result of Pauli blocking. We also apply these results to study the lifetime of quasi-particles and dimers at resonances.
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