{"id":"W2891857191","doi":"10.1103/physrevlett.121.100502","title":"Observation of Topologically Protected Edge States in a Photonic Two-Dimensional Quantum Walk","year":2018,"lang":"en","type":"article","venue":"Physical Review Letters","topic":"Topological Materials and Phenomena","field":"Physics and Astronomy","cited_by":129,"is_retracted":false,"has_abstract":true,"ca_institutions":"University of Calgary; Canadian Institute for Advanced Research","funders":"Chinese Academy of Sciences; National Natural Science Foundation of China","keywords":"Quantum walk; Floquet theory; Physics; Quantum; Lattice (music); Statistical physics; Topology (electrical circuits); Quantum mechanics; Theoretical physics; Quantum computer; Mathematics; Nonlinear system","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":"codex-gemma-dda1882f352a","candidate_categories":["insufficient_payload"],"consensus_categories":[],"category_scores_codex":[0.0001636621,0.0001595608,0.0004408831,0.00002038048,0.00003741931,0.00001114346,0.0001541815,0.000008611099,0.001019696],"category_scores_gemma":[0.00001887372,0.0001116635,0.0001106322,0.0002140215,0.0001705396,0.00007245662,0.00005031503,0.0001171379,0.00006933066],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.00001428445,"about_ca_system_score_gemma":0.00001811082,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.000287591,"about_ca_topic_score_gemma":0.000002676619,"domain_scores_codex":[0.9988632,0.0001423999,0.0003517069,0.0002483064,0.0001456821,0.0002486687],"domain_scores_gemma":[0.9994364,0.00009873297,0.0001691322,0.0001841856,0.00005861547,0.000052941],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"bench_or_experimental","study_design_gemma":"theoretical_or_conceptual","study_design_scores_codex":[0.0001976507,0.001351525,0.01444686,0.001018291,0.0001154627,0.000005698892,0.0003229429,0.0004212222,0.8799461,0.08775544,0.0008790193,0.01353976],"study_design_scores_gemma":[0.004950596,0.002456355,0.3111863,0.005979802,0.0002335781,0.000002705598,0.00005962677,0.02156417,0.08312377,0.559669,0.008393546,0.002380497],"study_design_candidate":"bench_or_experimental","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9966274,0.0002470679,0.0001358198,0.002153157,0.00007423902,0.0004938756,0.00002488329,0.00001788411,0.0002256598],"genre_scores_gemma":[0.9962588,0.00002685308,0.0004184691,0.002910589,0.0002685548,0.00006416222,0.00004061194,0.000007740237,0.000004236187],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.7968224,"threshold_uncertainty_score":0.9998935,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.02647796860104165,"score_gpt":0.2912447255402161,"score_spread":0.2647667569391745,"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."}}