{"id":"W4407841549","doi":"10.1103/physreva.111.022813","title":"Investigating the <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:mn>4</mml:mn> <mml:msub> <mml:mi>D</mml:mi> <mml:mrow> <mml:mn>3</mml:mn> <mml:mo>/</mml:mo> <mml:mn>2</mml:mn> </mml:mrow> </mml:msub> <mml:mrow> <mml:mo>|</mml:mo> <mml:mn>3</mml:mn> <mml:mo>,</mml:mo> <mml:mo>±</mml:mo> <mml:mn>2</mml:mn> <mml:mo>〉</mml:mo> </mml:mrow> </mml:mrow> </mml:math> – <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:mrow> <mml:mn>4</mml:mn> <mml:msub> <mml:mi>D</mml:mi> <mml:mrow> <mml:mn>5</mml:mn> <mml:mo>/</mml:mo> <mml:mn>2</mml:mn> </mml:mrow> </mml:msub> <mml:mrow> <mml:mo>|</mml:mo> <mml:mn>3</mml:mn> <mml:mo>,</mml:mo> <mml:mo>±</mml:mo> <mml:mn>2</mml:mn> <mml:mo>〉</mml:mo> </mml:mrow> </mml:mrow> </mml:math> transition in <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"> <mml:msup> <mml:mrow> <mml:mi>Nb</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>4</mml:mn> <mml:mo>+</mml:mo> </mml:mrow> </mml:msup> </mml:math> for a THz atomic clock","year":2025,"lang":"lv","type":"article","venue":"Physical review. A/Physical review, A","topic":"Advanced Frequency and Time Standards","field":"Physics and Astronomy","cited_by":1,"is_retracted":false,"has_abstract":true,"ca_institutions":"Perimeter Institute","funders":"Ministry of Colleges and Universities; Physical Research Laboratory; Indian Space Research Organisation; National Natural Science Foundation of China; Government of Canada; Innovation, Science and Economic Development Canada; Arthritis National Research Foundation","keywords":"Chemistry","routes":{"ca_aff":true,"ca_fund":true,"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":[0.008062407,0.002018291,0.001219346,0.003670214,0.003785936,0.01599428,0.004554075,0.004384711,0.1667323],"category_scores_gemma":[0.02525943,0.001885509,0.002565139,0.004148447,0.002490087,0.02302296,0.006474013,0.006379519,0.1321383],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.006741323,"about_ca_system_score_gemma":0.008517369,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.06008101,"about_ca_topic_score_gemma":0.06200664,"domain_scores_codex":[0.9907321,0.002396276,0.0007954679,0.001339532,0.00382029,0.0009163467],"domain_scores_gemma":[0.987926,0.00270772,0.0006014943,0.002856578,0.005179702,0.0007285262],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"not_applicable","study_design_gemma":"bench_or_experimental","study_design_scores_codex":[0.000338297,0.0002991189,0.001341248,0.0005835667,0.00005541666,0.0004695521,0.002164816,0.002386137,0.00554075,0.1481667,0.7326486,0.1060059],"study_design_scores_gemma":[0.0000360592,0.00002340916,0.0005622136,0.0002192701,0.00001745724,0.0001147241,0.0006482812,0.004148814,0.004914494,0.01776009,0.9715034,0.00005176332],"study_design_candidate":"bench_or_experimental","study_design_consensus":null,"genre_codex":"other","genre_gemma":"empirical","genre_scores_codex":[0.01067102,0.00229734,0.2666973,0.04134814,0.004858643,0.001063543,0.0377018,0.04120601,0.5941563],"genre_scores_gemma":[0.07862492,0.004152997,0.203683,0.01493343,0.001062067,0.001285181,0.0884616,0.05398532,0.5538115],"genre_candidate":"empirical","genre_consensus":null,"teacher_disagreement_score":0.1667323,"threshold_uncertainty_score":0.5577753,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.01847036570683756,"score_gpt":0.2710325436038098,"score_spread":0.2525621778969722,"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."}}