Ground states of large bosonic systems: The gross Pitaevskii limit revisited Nam, Phan Rougerie, Nicolas Seiringer, Robert ; https://orcid.org/0000-0002-6781-0521 We study the ground state of a dilute Bose gas in a scaling limit where the Gross-Pitaevskii functional emerges. This is a repulsive nonlinear Schrödinger functional whose quartic term is proportional to the scattering length of the interparticle interaction potential. We propose a new derivation of this limit problem, with a method that bypasses some of the technical difficulties that previous derivations had to face. The new method is based on a combination of Dyson\'s lemma, the quantum de Finetti theorem and a second moment estimate for ground states of the effective Dyson Hamiltonian. It applies equally well to the case where magnetic fields or rotation are present. Mathematical Sciences Publishers 2016 info:eu-repo/semantics/article doc-type:article article http://purl.org/coar/resource_type/c_2df8fbb1 https://research-explorer.ista.ac.at/record/1143 Nam P, Rougerie N, Seiringer R. Ground states of large bosonic systems: The gross Pitaevskii limit revisited. <i>Analysis and PDE</i>. 2016;9(2):459-485. doi:<a href="https://doi.org/10.2140/apde.2016.9.459">10.2140/apde.2016.9.459</a> eng info:eu-repo/semantics/altIdentifier/doi/10.2140/apde.2016.9.459 info:eu-repo/semantics/altIdentifier/wos/000378287000006 info:eu-repo/semantics/altIdentifier/arxiv/1503.07061 info:eu-repo/semantics/openAccess