{"id":"7565aee1-183f-4bca-aa76-b065bb6df1a9","arxiv_id":"2504.12056","paper_version":1,"verdict":"CONDITIONAL","confidence":"MODERATE","novelty_score":6.0,"correctness_risk":"medium","formal_verification":"none","parameter_count":0,"one_line_summary":"In Brownian SYK models, operator size under the bath-traced Lindblad definition shows a scrambling signature only for intra-system interactions, with the same early-time critical point as the full-contour definition, plus finite-size corrections.","lead":"This paper compares two ways of measuring how quantum information spreads in an open system, where a small system is coupled to a large bath. It works out exactly, in solvable Brownian SYK models, when one definition shows a scrambling transition, and finds finite-size corrections missed by the earlier effective theory.","discovery_kind":"extension","skeptic_critique":null,"referee_report":null,"author_rebuttal":null,"desk_editor":null,"rs_alignment":null,"lean_confirmation":null,"pith_extraction":null,"created_at":"2026-08-16T12:41:09.675700+00:00","model_set":{"reader":"deepseek-v4-flash"},"falsifier":null,"supporting_citations":[],"review_version":1}