Abstract
The basis of the equation is critically examined. Here and . This equation, which relates the condensate fraction to the radial distribution function , was proposed by F. W. Cummings, G. J. Hyland, and G. Rowland [Phys. Konden. Mater. 12, 90 (1970)]. It is shown to be based on two assumptions. It cannot be derived from the Frohlich decomposition of the two-particle density matrix.
- Received 9 April 1980
DOI:https://doi.org/10.1103/PhysRevB.22.5199
©1980 American Physical Society