Stoffel, Andre; Gulacsi, Miklos
We study in random-phase approximation the newly discovered supersolid phase of 4He and present in detail its finite temperature properties. 4He is described within a hard-core quantum lattice gas model, with nearest and next-nearest neighbour interactions taken into account. We rigorously calculate all pair correlation functions in a cumulant decoupling scheme. Our results support the importance of the vacancies in the supersolid phase. We show that in a supersolid the net vacancy density...[Show more]
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