Ground state of the Gross–Pitaevskii equation with a harmonic potential in the energy-critical case

Article type: Research Article

Authors: Pelinovsky, Dmitry E.^{; *} | Sobieszek, Szymon

Affiliations: Department of Mathematics and Statistics, McMaster University, Hamilton, Ontario, Canada, L8S 4K1

Correspondence: [*] Corresponding author. E-mail: [email protected].

Abstract: Ground state of the energy-critical Gross–Pitaevskii equation with a harmonic potential can be constructed variationally. It exists in a finite interval of the eigenvalue parameter. The supremum norm of the ground state vanishes at one end of this interval and diverges to infinity at the other end. We explore the shooting method in the limit of large norm to prove that the ground state is pointwise close to the Aubin–Talenti solution of the energy-critical wave equation in near field and to the confluent hypergeometric function in far field. The shooting method gives the precise dependence of the eigenvalue parameter versus the supremum norm.

Keywords: Gross–Pitaevskii equation, ground state, energy-critical case, shooting method

DOI: 10.3233/ASY-241897

Journal: Asymptotic Analysis, vol. 139, no. 1-2, pp. 1-29, 2024