Abstract
A microscopic theory of impurities in liquid helium is developed from the theory of Sunakawa and coworkers. A canonical transformation is used to renormalize the phonons. The theory is applied to3He impurities, to positive ions, to the interaction between3He impurities, and to the interaction between a3He and a positive ion. It is found that these interactions are zero in the long-wavelength limit, if the phonons are not renormalized. The coupling between the3He and the phonons due to the change in the binding energy of the3He with density variations is also considered.
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Work supported in part by the Science Research Council.
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Bowley, R.M. Microscopic theory of impurities in liquid helium. II. J Low Temp Phys 8, 261–275 (1972). https://doi.org/10.1007/BF00655083
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DOI: https://doi.org/10.1007/BF00655083