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The Dilemma of Bose Solids: is He Supersolid?
Philip W Anderson
Nearly a decade ago the old controversy about possible superfluid flow in the ground state of solid He4 was revived by the apparent experimental observation of such superflow. Alth…
Theory of Supersolidity
Philip W. Anderson
After reviewing some experimental facts, and early theories, I sketch the Hartree-Fock description of Boson solids, emphasizing the contrast with the Fermion case in that the natur…
A Gross-Pitaevskii Treatment for Supersolid He
Philip W Anderson
The observations of non-linear rotational susceptibility (NCRI) in samples of solid He below 1-200 mK temperatures are conjectured to be describable in terms of a rarified Gross-Pi…
Two New Vortex Liquids
Philip W Anderson
It is suggested that the observations of nonlinear susceptibility and Nernst effect in cuprate superconductors above Tc, and those of non-classical rotational inertia in solid He,…
Physics of a Superfluid Solid
Philip Anderson
The question of whether a Bose solid has a superfluid fraction is discussed. We confirm and expand on the remark of Chester that quantum fluctuations make this inevitable, roughly…