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![]() | Wu, Yong-Shi | Wave function describing superfluidity in a perfect crystal | We propose a many-body wave function that exhibits both diagonal and off-diagonal long-range order. Incorporating short-range correlations due to interatomic repulsion, this wave function is shown to allow condensation of zero-point lattice vibrations and phase rigidity. In the presence of an exter... | 2005-07-01 |