Phase coherence

1
Phase coherence and fragmentation in weakly
interacting BECs
... story based on a same-title paper to appear
in PRA 2008
Sorin Paraoanu
2
A chicken - and - egg dilema in condensed-matter
physics how and when is phase coherence
established between two independent superfluids.
Andersons scenario in He now recast in cold
cases. What breaks the U(1) symmmetry when there
is no small perturbation.