{"work":{"id":"90c5dd9b-c814-4e32-9cbf-da5c2bed61c2","openalex_id":null,"doi":null,"arxiv_id":"0803.3085","raw_key":null,"title":"Monodromy in the CMB: Gravity Waves and String Inflation","authors":null,"authors_text":"E","year":2008,"venue":"hep-th","abstract":"We present a simple mechanism for obtaining large-field inflation, and hence a gravitational wave signature, from string theory compactified on twisted tori. For Nil manifolds, we obtain a leading inflationary potential proportional to phi^(2/3) in terms of the canonically normalized field phi, yielding predictions for the tilt of the power spectrum and the tensor-to-scalar ratio, $n_s\\approx 0.98$ and $r\\approx 0.04$ with 60 e-foldings of inflation; we note also the possibility of a variant with a candidate inflaton potential proportional to phi^(2/5). The basic mechanism involved in extending the field range -- monodromy in D-branes as they move in circles on the manifold -- arises in a more general class of compactifications, though our methods for controlling the corrections to the slow-roll parameters require additional symmetries.","external_url":"https://arxiv.org/abs/0803.3085","cited_by_count":null,"metadata_source":"pith","metadata_fetched_at":"2026-05-24T23:55:06.925658+00:00","pith_arxiv_id":"0803.3085","created_at":"2026-05-12T03:31:19.711960+00:00","updated_at":"2026-05-24T23:55:06.925658+00:00","title_quality_ok":true,"display_title":"Silverstein and A","render_title":"Silverstein and A"},"hub":{"state":{"work_id":"90c5dd9b-c814-4e32-9cbf-da5c2bed61c2","tier":"hub","tier_reason":"10+ Pith inbound or 1,000+ external citations","pith_inbound_count":14,"external_cited_by_count":null,"distinct_field_count":5,"first_pith_cited_at":"2019-07-10T01:01:01+00:00","last_pith_cited_at":"2026-05-20T12:24:00+00:00","author_build_status":"not_needed","summary_status":"needed","contexts_status":"needed","graph_status":"needed","ask_index_status":"not_needed","reader_status":"not_needed","recognition_status":"not_needed","updated_at":"2026-05-25T04:35:29.297593+00:00","tier_text":"hub"},"tier":"hub","role_counts":[{"context_role":"background","n":6}],"polarity_counts":[{"context_polarity":"background","n":6}],"runs":{},"summary":{},"graph":{},"authors":[]}}