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A Gross-Pitaevskii Treatment for Supersolid Helium

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SCIENCE
卷 324, 期 5927, 页码 631-632

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AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1169456

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Understanding the observations of nonlinear rotational susceptibility in samples of solid helium below temperatures of 1 to 200 millikelvin (mK) has been a subject of some controversy. Here, the observations are conjectured to be describable in terms of a rarified Gross-Pitaevskii superfluid of vacancies, with a transition temperature of about 50 mK, whose density is locally enhanced by crystal imperfections. The observations can be greatly affected by this density enhancement. I argue that every pure Bose solid's ground state is a supersolid.

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