{"paper":{"title":"Gravitational waves in the presence of a cosmological constant","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"hep-th","authors_text":"Daniel Puigdom\\`enech, Dom\\`enec Espriu, Jos\\'e Bernabeu","submitted_at":"2011-06-22T17:17:24Z","abstract_excerpt":"We derive the effects of a non-zero cosmological constant $\\Lambda$ on gravitational wave propagation in the linearized approximation of general relativity. In this approximation we consider the situation where the metric can be written as $g_{\\mu\\nu}= \\eta_{\\mu\\nu}+ h_{\\mu\\nu}^\\Lambda + h_{\\mu\\nu}^W$, $h_{\\mu\\nu}^{\\Lambda,W}<< 1$, where $h_{\\mu\\nu}^{\\Lambda}$ is the background perturbation and $h_{\\mu\\nu}^{W}$ is a modification interpretable as a gravitational wave. For $\\Lambda \\neq 0$ this linearization of Einstein equations is self-consistent only in certain coordinate systems. The cosmolo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.4511","kind":"arxiv","version":1},"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"}