{"id":"W2124814863","doi":"10.1103/physrevd.80.084003","title":"Quantization of unimodular gravity and the cosmological constant problems","year":2009,"lang":"en","type":"article","venue":"Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology","topic":"Cosmology and Gravitation Theories","field":"Physics and Astronomy","cited_by":193,"is_retracted":false,"has_abstract":true,"ca_institutions":"Perimeter Institute","funders":"","keywords":"Unimodular matrix; Physics; Cosmological constant; Semiclassical gravity; Quantum gravity; Semiclassical physics; Cosmological constant problem; Quantization (signal processing); Mathematical physics; Effective action; Constant curvature; Hamiltonian (control theory); Path integral formulation; Classical mechanics; Curvature; Quantum; Theoretical physics; Quantum mechanics; Dark energy; Quantum dynamics; Quantum process; Cosmology; Mathematics; Geometry","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0008221239,0.0003301175,0.0004721619,0.0008203385,0.001173257,0.001727297,0.0006999472,0.0008438263,0.002324883],"category_scores_gemma":[0.001048343,0.0001772974,0.0003827532,0.0007715839,0.005093075,0.002748654,0.001018396,0.001423343,0.0002229448],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.001873058,"about_ca_system_score_gemma":0.0009676942,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.001791692,"about_ca_topic_score_gemma":0.001704092,"domain_scores_codex":[0.9996209,0.0001444845,0.0000172371,0.00005577582,0.0001218483,0.00003955807],"domain_scores_gemma":[0.9996401,0.0001091349,0.00006637177,0.0000701372,0.00006121618,0.00005301317],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"theoretical_or_conceptual","study_design_gemma":"theoretical_or_conceptual","study_design_scores_codex":[0.000001533747,0.000002156829,0.00002022799,0.0000067162,0.000001163823,0.00001327275,0.00003556758,0.0001814759,0.00009502978,0.9982001,0.0002549306,0.00118771],"study_design_scores_gemma":[0.000002581613,0.000004255639,0.00009201078,0.000005833145,0.000001775849,0.00004379672,0.00003130279,0.001484546,0.00006192589,0.9961281,0.002139116,0.000004615247],"study_design_candidate":"theoretical_or_conceptual","study_design_consensus":"theoretical_or_conceptual","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.3593529,0.04015314,0.2314264,0.02215422,0.001842387,0.0000776317,0.0002878554,0.0003273524,0.3443781],"genre_scores_gemma":[0.9550521,0.003948677,0.02866535,0.0007590488,0.0004079568,0.0000533537,0.00005016813,0.00003702653,0.01102626],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.002324883,"threshold_uncertainty_score":0.0135901,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.01806665669629971,"score_gpt":0.3146941950036238,"score_spread":0.2966275383073241,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}