van der Waals Universality near a Quantum Tricritical Point

被引：27

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

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 124卷 / 14期

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.

引用

页数：6

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