Criterion for Bose-Einstein condensation in traps and self-bound systems
Criterion for Bose-Einstein condensation in traps and self-bound systems
The internal one-particle density matrix is discussed for Bose-Einstein condensates with a finite number of particles in a harmonic trap. It is found that the outcome of the diagonalization of the single-particle density matrix depends on the choice of the internal coordinates: The Pethick-Pitaevskii (PP) type of internal density matrix, …