van der Waals Universality near a Quantum Tricritical Point

被引:26
作者
Mestrom, P. M. A. [1 ]
Colussi, V. E. [1 ]
Secker, T. [1 ]
Groeneveld, G. P. [1 ]
Kokkelmans, S. J. J. M. F. [1 ]
机构
[1] Eindhoven Univ Technol, POB 513, NL-5600 MB Eindhoven, Netherlands
关键词
BOSE-EINSTEIN CONDENSATE; EXCITATIONS; COLLAPSE; SYSTEMS; LIQUID;
D O I
10.1103/PhysRevLett.124.143401
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We study the three-body scattering hypervolume D of atoms whose scattering length a is on the order of or smaller than the typical range r(vdW) of the van derWaals attraction. We find that the real part of D behaves universally in this weakly interacting regime (vertical bar a vertical bar/r(vdW) less than or similar to 1) in the absence of trimer resonances. This universality originates from hard-spherelike collisions that dominate elastic three-body scattering. We use this result to make quantitative predictions for the thermodynamics and elementary excitations of an atomic Bose-Einstein condensate in the vicinity of a quantum tricritical point, including quantum droplets stabilized by effective three-body interactions.
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页数:6
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