Third order corrections to the ground state energy of a Bose gas in the Gross-Pitaevskii regime

Abstract

For a translation invariant system of $N$ bosons in the Gross-Pitaevskii regime, we establish a precise bound for the ground state energy $E_N$. While the leading, order $N$, contribution to $E_N$ has been known since [30,28] and the second order corrections (of order one) have been first determined in [5], our estimate also resolves the next term in the asymptotic expansion of $E_N$, which is of the order $(\log N)/N$.

Final version

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Cited by in corpus (2)

• The excitation spectrum of a Bose gas with an impurity in the Gross-Pitaevskii regime
• Validity of the Fröhlich model for a mobile impurity in a Bose-Einstein condensate