{"paper":{"title":"Bogoliubov theory of interacting bosons: new insights from an old problem","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.quant-gas","authors_text":"Loris Ferrari","submitted_at":"2016-12-12T11:19:54Z","abstract_excerpt":"In a gas of $N$ interacting bosons, the Hamiltonian $H_c$, obtained by dropping all the interaction terms between free bosons with moment $\\hbar\\mathbf{k}\\ne\\mathbf{0}$, is diagonalized exactly. The resulting eigenstates $|\\:S,\\:\\mathbf{k},\\:\\eta\\:\\rangle$ depend on two discrete indices $S,\\:\\eta=0,\\:1,\\:\\dots$, where $\\eta$ numerates the \\emph{quasiphonons} carrying a moment $\\hbar\\mathbf{k}$, responsible for transport or dissipation processes. $S$, in turn, numerates a ladder of \\textquoteleft vacua\\textquoteright$\\:|\\:S,\\:\\mathbf{k},\\:0\\:\\rangle$, with increasing equispaced energies, formed"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.03617","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}