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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Limitation of the Lee-Huang-Yang interaction in forming a self-bound state in Bose-Einstein condensates

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Author(s):
Gautam, Sandeep [1] ; Adhikari, Sadhan K. [2]
Total Authors: 2
Affiliation:
[1] Indian Inst Technol Ropar, Dept Phys, Rupnagar 140001, Punjab - India
[2] Univ Estadual Paulista UNESP, Inst Fis Teor, BR-01140070 Sao Paulo, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: ANNALS OF PHYSICS; v. 409, OCT 2019.
Web of Science Citations: 0
Abstract

The perturbative Lee-Huang-Yang (LHY) interaction proportional to n(3/2), where n is the density, creates an infinitely repulsive potential at the center of a Bose-Einstein condensate (BEC) with net attraction, which stops the collapse to form a self-bound state in a dipolar BEC and in a binary BEC. However, recent microscopic calculations of the non-perturbative beyond-meanfield (BMF) interaction indicate that the LHY interaction is valid only for very small values of gas parameter x. We show that a realistic non-perturbative BMF interaction can stop collapse and form a self-bound state only in a weakly attractive binary BEC with small x values (x less than or similar to 0.01), whereas the perturbative LHY interaction stops collapse for all attractions. We demonstrate these aspects using an analytic BMF interaction with appropriate weak-coupling LHY and strong coupling limits. (C) 2019 Elsevier Inc. All rights reserved. (AU)

FAPESP's process: 16/01343-7 - ICTP South American Institute for Fundamental Research: a regional center for theoretical physics
Grantee:Nathan Jacob Berkovits
Support Opportunities: Special Projects