{"paper":{"title":"Lorentzian LQG vertex amplitude","arxiv_id":"0710.5043","primary_cat":"gr-qc","submitted_at":"2007-10-26T09:58:19+00:00","version_compiled":"v2"},"notice":"Every quoted sentence is the authors' text from the arXiv listing abstract. Labels and probabilities are the outputs of classifier-1.13-20260917 on the question bank abstract-p1-20260923, exactly as returned. No sentence in this record was written by a language model.","schema":"pith.compiled-record/v0","status":"compiled","abstract":{"source":"arXiv listing abstract v2","sentences":[{"i":0,"p":1.0,"id":"s0","own":true,"role":"contribution","text":"We generalize a model recently proposed for Euclidean quantum gravity to the case of Lorentzian signature.","hedge":{"p":0.99,"label":"asserted"},"own_p":0.92,"main_claim_p":0.19,"quantitative":false,"quantitative_p":0.08,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":1.0,"interpretation":0.0}},{"i":1,"p":0.89,"id":"s1","own":true,"role":"result","text":"The main features of the Euclidean model are preserved in the Lorentzian one.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.76,"main_claim_p":0.28,"quantitative":false,"quantitative_p":0.16,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.89,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.01,"interpretation":0.1}},{"i":2,"p":0.99,"id":"s2","own":true,"role":"result","text":"In particular, the boundary Hilbert space matches the one of SU(2) loop quantum gravity.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.72,"main_claim_p":0.19,"quantitative":false,"quantitative_p":0.39,"role_probabilities":{"gap":0.0,"method":0.0,"result":0.99,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.0,"interpretation":0.01}},{"i":3,"p":0.87,"id":"s3","own":true,"role":"method","text":"As in the Euclidean case, the model can be obtained from the Lorentzian Barrett-Crane model from a flipping of the Poisson structure, or alternatively, by adding a topological term to the action and taking the small Barbero-Immirzi parameter limit.","hedge":{"p":0.94,"label":"asserted"},"own_p":0.55,"main_claim_p":0.15,"quantitative":false,"quantitative_p":0.41,"role_probabilities":{"gap":0.0,"method":0.87,"result":0.02,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.1,"interpretation":0.01}}]},"compiled":{"main_claim":{"p":0.8,"text":"The main features of the Euclidean model are preserved in the Lorentzian one.","location":"abstract s1","hedge_strength":{"p":1.0,"label":"asserted"}},"provenance":{"route":{"via":"OpenRouter","model":"classifier-1.13","endpoint":"https://openrouter.ai/api/v1/systemone","provider":"TypeSafe"},"packing":"one request per paper","requests":1,"input_tokens":3581,"cost_usd_reported":0.00015},"compiled_at":"2026-09-23","bank_version":"abstract-p1-20260923","model_version":"classifier-1.13-20260917","abstract_states":{"claims_first":0.05,"states_limitation":0.07,"human_participants":0.01,"controlled_comparison":0.04,"randomized_assignment":0.01,"states_quantitative_result":0.03,"compares_with_prior_results":0.89,"mentions_code_or_data_availability":0.02},"evidential_basis":{"p":0.94,"value":"proof or derivation","probabilities":{"argument":0.05,"literature":0.01,"proof_or_derivation":0.94,"analysis_of_existing_data":0.0,"observation_or_experiment":0.0,"simulation_or_computation":0.0}},"contribution_type":{"p":1.0,"value":"theoretical result","probabilities":{"review":0.0,"method_or_tool":0.0,"empirical_study":0.0,"simulation_study":0.0,"theoretical_result":1.0,"dataset_or_benchmark":0.0,"position_or_commentary":0.0}},"contribution_statement":{"p":1.0,"text":"We generalize a model recently proposed for Euclidean quantum gravity to the case of Lorentzian signature.","location":"abstract s0"}},"coverage":{"tier":"abstract","levels_run":["P abstract"],"not_examined":["full text","figures and tables","references and citing sentences","relations to other papers"],"sources_read":["arXiv listing abstract v2"],"levels_not_run":["S sections","T body sentences","C citations","R cross-paper relations"],"sentences_examined":4,"sentences_in_abstract":4},"measured_accuracy":{"url":"https://pith.science/accuracy","measured_on":"2026-10-02","method":"two independent model families labelled a fresh random sample blind; the figure is how often the published label matches their consensus","sentence_role_agreement":0.92,"main_claim_agreement":0.908,"typed_citation_agreement":0.933,"typed_citation_agreement_95_interval":[0.917,0.945],"review_comments_accurate":0.758,"review_comments_accurate_95_interval":[0.684,0.82],"review_caught_admitted_error_found_or_related":0.448}}