منابع مشابه
RPA approach to supersolidity
We investigate the newly discovered supersolid phase by solving in random phase approximation the anisotropic Heisenberg model of the hard-core boson He lattice. We include nearestand next-nearest-neighbor interactions and calculate exactly all pair correlation functions in a cumulant expansion scheme. Here we clarify the controversy over the role of the vacancies and defects, which have long b...
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15 صفحه اولRPA - Approach to the Excitations of the Nucleon ,
The tensor-RPA approach developed previously in part I is applied to the Nambu-Jona-Lasinio (NJL) model. As a rst step we investigate the structure of Dirac-Hartree-Fock solutions for a rotationally and isospin invariant ground-state density. Whereas vacuum properties can be reproduced, no solitonic connguration for a system with unit baryon number is found. We then solve the tensor-RPA equatio...
متن کاملDark Matter and Supersolidity
The recet experiments on supersolidity sheds new light on the issue of Dark matter and the missing mass. The origin of collisionless cold dark matter has been traced back to its origin to the supersolid model of quantum vacuum.
متن کاملFate of vacancy-induced supersolidity in 4He.
The supersolid state of matter, exhibiting nondissipative flow in solids, has been elusive for 35 years. The recent discovery of a nonclassical moment of inertia in solid 4He by Kim and Chan provided the first experimental evidence, although the interpretation in terms of supersolidity of the ideal crystal phase remains a subject to debate. Using quantum Monte Carlo methods we investigate the l...
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ژورنال
عنوان ژورنال: EPL (Europhysics Letters)
سال: 2009
ISSN: 0295-5075,1286-4854
DOI: 10.1209/0295-5075/85/20009