TY - JOUR
T1 - Interacting bosons in a nearly resonant potential well
AU - Straley, Joseph P.
AU - Kolomeisky, Eugene B.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2007/6/25
Y1 - 2007/6/25
N2 - We establish that the ability of a localized trapping potential to bind weakly interacting bosons is dramatically enhanced in the vicinity of the threshold of formation of the single-particle bound state of the trap. Specifically, for repulsive particles and a superthreshold trapping potential the equilibrium number of bound bosons and the size of the ground state diverge upon approaching the single-particle threshold from above. For attractive interactions and a subthreshold trap, a collective bound state always forms for a sufficiently large number of bosons, despite the inability of interparticle attraction alone to form a two-body bound state.
AB - We establish that the ability of a localized trapping potential to bind weakly interacting bosons is dramatically enhanced in the vicinity of the threshold of formation of the single-particle bound state of the trap. Specifically, for repulsive particles and a superthreshold trapping potential the equilibrium number of bound bosons and the size of the ground state diverge upon approaching the single-particle threshold from above. For attractive interactions and a subthreshold trap, a collective bound state always forms for a sufficiently large number of bosons, despite the inability of interparticle attraction alone to form a two-body bound state.
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U2 - 10.1103/PhysRevA.75.063421
DO - 10.1103/PhysRevA.75.063421
M3 - Article
AN - SCOPUS:34547336717
VL - 75
IS - 6
M1 - 063421
ER -