{"id":"47975fba-211e-4033-82d4-12f7ba3bae3e","arxiv_id":"2508.06260","paper_version":1,"verdict":"UNVERDICTED","confidence":"LOW","novelty_score":6.0,"correctness_risk":"unknown","formal_verification":"none","parameter_count":2,"one_line_summary":"Active particles are claimed to make ultrastable glasses yield homogeneously with multiple shear bands instead of failing brittlely, though the manuscript body provided is a different paper.","lead":"This preprint's abstract reports computer simulations showing that adding self-propelled run-and-tumble particles to ultrastable glasses converts brittle shear-band failure into homogeneous, delayed yielding. However, the manuscript body provided is an entirely different paper on numerical methods for gas dynamics, so the claimed results cannot currently be checked.","discovery_kind":"new_application","skeptic_critique":{"model":"deepseek-v4-flash","headline":"Submitted full text is an unrelated numerical-analysis paper; the central claims about active-particle-doped glasses have no supporting methods or data in the document.","rationale":"The reader's verdict is UNVERDICTED, and my stress-test identifies the same load-bearing concern: the body text does not match the abstract and therefore cannot support the central claim. The reader's weakest_assumption was that the simulated systems are sufficiently large, slowly sheared, and sampled enough for the reported multiple-shear-band behavior and power-law spacing to be converged, and that this premise could not be checked because the body is unrelated. I agree with that formulation. My attack is narrower: the absence of any simulation details in the submitted full text is itself the decisive problem. I considered whether the claimed power law could be checked against known results in the literature, but that would be speculative and would not settle the document mismatch. I also considered whether the mismatch might be an artifact of the review pipeline; the reviewing rule instructs me not to dismiss manuscript text as a pipeline artifact, so I treat the mismatch as substantive. Because the actual simulation paper may exist and be sound, REJECT would be inappropriate; UNVERDICTED is the honest status. The concrete test I propose is a single retrieval-and-comparison step that would confirm whether the mismatch is real and whether a correct body exists.","tokens_in":18384,"tokens_out":1701,"duration_ms":20870,"concrete_test":"Query the arXiv API for identifier 2508.06260 and compare the returned title, abstract, and full-text PDF with the submitted document. Specifically, search the submitted full text for the strings 'active', 'glass', 'shear band', 'swap Monte Carlo', 'persistence', and 'yield'. If none of these appear, the mismatch is confirmed and the correct manuscript must be supplied before any assessment of the physics claims is possible.","verdict_should_be":"UNCHANGED","load_bearing_attack":"The abstract claims a crossover from heterogeneous to homogeneous yielding, progressive multi-shear-band emergence, a power-law relation between band spacing and active force, and a compensation between active force and shear rate. To be credible, these claims require a simulation study with documented system sizes, strain rates, persistence times, activity ranges, statistical averaging, and convergence checks. The submitted full text, however, is arXiv:2508.06273v2, a math.NA paper by Chudzik, Helzel, and Porfetye on fully discrete Active Flux methods for the two-dimensional Euler equations. It contains no discussion of active particles, glasses, shear bands, swap Monte Carlo, yielding, or persistence time. Thus the central claim is entirely unsupported by the body text provided: there is no method section, no parameter table, no error analysis, and no simulation data that could validate the power-law or the compensation relation. This is not a subtle scientific flaw but a document-level mismatch that makes the abstract's central claim unverifiable from the submitted materials. The precondition for any substantive review—that the manuscript body corresponds to the claimed study—is not met. I flag this explicitly because the reviewing rule asks me to treat all manuscript text as in-scope evidence; doing so reveals an internal inconsistency between the abstract and the body.","agreement_with_reader":"agree"},"referee_report":{"model":"deepseek-v4-flash","summary":"This paper, as represented by the abstract, claims that doping ultrastable glasses with run-and-tumble self-propelled particles converts brittle, single-shear-band failure into homogeneous, delayed, multi-band yielding. The abstract further reports a crossover from heterogeneous to homogeneous yielding, the progressive emergence of multiple shear bands, a compensatory relationship between active force and global shear rate characterized as 'isomorphic-like,' a non-monotonic dependence of yield stress on persistence time, and a power-law decrease of shear-band spacing with active force. The submitted full text, however, is arXiv:2508.06273v2, a numerical-analysis paper on fully discrete Active Flux methods for the two-dimensional Euler equations by Chudzik, Helzel, and Porfetye. It contains no material on glasses, active particles, shear bands, swap Monte Carlo, persistence time, or yielding. Thus the abstract's central claims have no supporting methods, simulation data, or analysis in the submitted manuscript.","tokens_in":18557,"tokens_out":3263,"duration_ms":31128,"significance":"The qualitative scenario—activity converting brittle failure into homogeneous yielding with tunable band spacing—would be a notable contribution to the physics of ultrastable glasses and active matter, with potential implications for designing ductile glassy materials. However, the manuscript in its current form provides no evidence for this scenario: the full text is an unrelated paper, and the abstract alone is insufficient to establish the model, parameters, simulation protocol, or statistics. The significance is therefore entirely conditional on the existence of a correct manuscript that is not present.","major_comments":[{"comment":"The submitted full text is arXiv:2508.06273v2, 'A Fully Discrete Truly Multidimensional Active Flux Method for the Two-Dimensional Euler Equations,' by Chudzik, Helzel, and Porfetye. It contains no discussion of active particles, glasses, shear banding, swap Monte Carlo, persistence time, or yielding. The abstract's central claims—crossover from heterogeneous to homogeneous yielding, multiple shear bands, power-law band spacing, active-force/shear-rate compensation—therefore have no supporting methods, simulation data, or analysis in the manuscript. This document-level mismatch makes the central claim unverifiable and prevents substantive review.","section":"Full Text (Sections 1–4)"},{"comment":"The abstract reports no system sizes, strain rates, activity range, persistence times, number of configurations, or statistical error bars. For a computational scaling claim (power-law spacing vs. active force) and a 'crossover' in yielding mode, such details are load-bearing. Their absence, combined with the missing body, means the central claims cannot be checked.","section":"Abstract"},{"comment":"The claimed 'compensatory relationship between active forces and global shear rates' arising from 'isomorphic-like behavior' is stated without definition of the rescaling or the free parameters. If this is a data collapse, the abstract does not identify the hidden exponent or the collapse variable, so the risk of circularity (a rescaling parameter producing the collapse by construction) cannot be ruled out. No equations or figures are provided to support the claim.","section":"Abstract (compensatory relationship)"}],"minor_comments":[{"comment":"The full text's arXiv number (2508.06273v2) and title do not match the abstract (2508.06260); this indicates a document-assembly error that must be corrected before any review.","section":"Full Text header"},{"comment":"The phrase 'isomorphic-like behavior' is undefined; if it refers to a specific scaling or collapse, a definition and reference should be provided.","section":"Abstract"}],"recommendation":"reject","confidential_remarks":"The submitted full text is an unrelated numerical analysis paper; this appears to be a submission error rather than a substantive scientific issue. I recommend returning the manuscript to the authors without further review; if the correct manuscript is submitted, it can be evaluated on its merits."},"author_rebuttal":null,"desk_editor":{"model":"deepseek-v4-flash","letter":"Ed, the thing to know: the body of this submission isn't the paper described in the abstract. The abstract promises a simulation study of active self-propelled particles in ultrastable glasses, with claims about yielding crossovers, shear-band spacing, and a compensation between activity and strain rate. The full text, however, is arXiv:2508.06273v2—Chudzik, Helzel, and Porfetye's numerical analysis paper on fully discrete Active Flux methods for the 2D Euler equations. I checked; there is no glass, no active matter, no shear band, no swap Monte Carlo anywhere in it. The stress-test note has it right: this is a document-level mismatch, not a subtle flaw.\n\nWhat's genuinely there: the abstract alone is well posed. It identifies an open question—how shear banding responds to active doping in ultrastable glasses—and states four concrete, falsifiable findings. If the actual simulation paper exists and the findings hold, that's a useful contribution. The claims are the kind you can audit: a crossover, a compensation relation, a non-monotonic persistence-time effect, a power-law spacing law. I'd want to read that paper.\n\nThe problem is that none of it is in this document. There are no system sizes, strain rates, persistence times, activity ranges, statistics, or error bars. The compensation and the power law are exactly where I'd worry about data-collapse artifacts or hidden fitting, and there is no way to check. So the abstract's significance and novelty are speculative.\n\nMy recommendation: don't send this to referees. Desk-reject or return to the authors for a corrected submission. Flag the arXiv ID as likely mismatched. If the correct manuscript arrives with methods and data, then yes, send it out—a serious referee could either confirm the crossover and the power law or find the soft spots. But this document, as it stands, has no reviewable content.","headline":"The submitted full text is an unrelated numerical-analysis paper; the abstract's claims about active-particle glasses have no supporting body text, so the paper is not refereeable in this form.","tokens_in":19138,"tokens_out":3435,"would_cite":false,"duration_ms":37432,"reading_group":"no","serious_thinker":"unclear","would_accept_peer_review":false},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"deepseek-v4-flash","headline":"The paper reports that doping ultrastable glasses with run-and-tumble active particles converts brittle single-band fracture into homogeneous, delayed yielding with multiple shear bands whose spacing shrinks as a power law of active force.","keywords":["ultrastable glasses","active particles","shear banding","yielding","brittle failure","run-and-tumble motion","swap Monte Carlo","mechanical stability"],"falsifier":"Repeat the simulations at two and four times the linear system size and at several lower strain rates, and check whether the crossover activity, the delayed yield strain, and the power-law exponent for shear-band spacing remain fixed. An experimental alternative is to dope a colloidal or granular glass with self-propelled particles and measure shear-band spacing directly; if the spacing does not decrease with activity as a clean power law, the central claim fails.","tokens_in":18175,"feed_emoji":"🧪","tokens_out":6256,"duration_ms":58651,"temperature":0.7,"pith_summary":"The paper studies ultrastable glasses doped with self-propelled particles that perform run-and-tumble motion, and asks whether such active particles change how the glass breaks under shear. It claims they do: increasing activity causes a crossover from heterogeneous yielding—one catastrophic shear band—to homogeneous yielding, with many shear bands forming progressively and failure happening continuously and later. A compensation relation links active force and global shear rate, so raising one can offset lowering the other. Short persistence times raise the yield stress with active force, while long persistence times lower it, so activity offers a tunable window. Finally, the spacing between shear bands shrinks as a power law as active force grows, giving a quantitative handle on the failure mode.","feed_headline":"Active particles turn brittle glass failure into graceful yielding","feed_subtitle":"A few self-propelled dopants spread strain across many shear bands, delaying breakage.","key_machinery":"The central mechanism is the self-propelled dopant: particles that perform run-and-tumble motion, meaning straight runs interrupted by random reorientations, exert a persistent active force on the glass matrix over a persistence time. As the active force grows, these particles inject local stress fluctuations that redistribute strain across the system. The key quantitative objects are the shear-band spacing as a function of active force and the isomorphic-like equivalence between active force and global shear rate, which together let the authors map different activity-rate combinations onto equivalent yielding behavior.","core_discovery":"The central discovery, reported from extensive computer simulations of a polydisperse glass-forming model prepared with swap Monte Carlo to reach ultrastable states, is that a population of self-propelled run-and-tumble particles changes the failure mode under shear. Instead of a single brittle shear band, the doped glass develops multiple shear bands whose organization grows with activity; yielding becomes gradual and is delayed. The authors find a compensatory relation between active force and global strain rate—combinations of the two behave in an isomorphic-like way, so a rise in one can offset a fall in the other—and a non-monotonic dependence of yielding on persistence time. The shear-","pith_inferences":["Beyond the paper: the compensation relation suggests a scaling collapse—yield stress or band spacing measured at different (active force, strain rate) pairs may fall on one master curve; a direct test is to rescale data by a characteristic active velocity.","Beyond the paper: if the mechanism is mechanical rather than chemical, doping with active particles could generalize to other brittle solids, such as metallic or colloidal glasses, provided the active species remains dispersed.","Beyond the paper: the non-monotonic persistence-time effect implies an optimal persistence length, possibly tied to the size of the local relaxation region, which could turn activity into a design parameter rather than a side effect.","Beyond the paper: shear-band spacing in experiments may serve as a readout of local activity, since the claimed power law ties a measurable spatial pattern to active force."],"forward_implications":["Ultrastable glasses can be made to fail in a ductile-like way without changing their chemistry: a small fraction of active dopants spreads strain over many shear bands and delays failure.","Active force and shear rate become interchangeable control parameters, so experiments or simulations at different rates could be compared by rescaling activity.","The power-law relation for shear-band spacing gives a design equation: the required fineness of strain localization determines the active force needed.","Persistence time provides a non-monotonic tuning knob, meaning there is an optimal activity window for raising yield stress, since longer persistence degrades it.","If the compensation relation is exact, it may allow extrapolating low-strain-rate behavior from computationally feasible higher rates by tuning activity."],"supporting_citations":[],"fun_headline_variants":["Active particles make ultrastable glasses bend, not break","Doping glasses with swimmers turns brittle failure into gradual yield","Self-propelled dopants delay glass fracture by spreading shear bands","Active dopants tame brittle failure in ultrastable glasses","Run-and-tumble particles convert brittle glass failure to smooth yielding"],"cache_read_input_tokens":2816,"weakest_assumption_plain":"The load-bearing premise is that the simulation results are converged, i.e., the systems are large enough, the shear slow enough, and the configurational sampling broad enough that the observed multiple shear bands, delayed yielding, and power-law band spacing reflect the physics and not finite-size, strain-rate, or coupling artifacts; the submitted text provided here contains only the abstract, so the simulation protocol cannot be inspected.","fun_headline_variants_meta":{"raw":{"variants":["Active particles make ultrastable glasses bend, not break","Doping glasses with swimmers turns brittle failure into gradual yield","Self-propelled dopants delay glass fracture by spreading shear bands","Active dopants tame brittle failure in ultrastable glasses","Run-and-tumble particles convert brittle glass failure to smooth yielding"]},"model":"deepseek-v4-flash","effort":"low","cost_usd":0.000499,"raw_usage":{"total_tokens":2282,"prompt_tokens":750,"completion_tokens":1532,"prompt_tokens_details":{"cached_tokens":256},"prompt_cache_hit_tokens":256,"prompt_cache_miss_tokens":494,"completion_tokens_details":{"reasoning_tokens":1459}},"tokens_in":494,"tokens_out":1532,"duration_ms":11490,"temperature":1.0,"reasoning_tokens":1459,"cache_read_input_tokens":256,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-08-05T22:49:09.685737+00:00","model_set":{"reader":"deepseek-v4-flash"},"falsifier":"Repeat the simulations at two and four times the linear system size and at several lower strain rates, and check whether the crossover activity, the delayed yield strain, and the power-law exponent for shear-band spacing remain fixed. An experimental alternative is to dope a colloidal or granular glass with self-propelled particles and measure shear-band spacing directly; if the spacing does not decrease with activity as a clean power law, the central claim fails.","supporting_citations":[],"review_version":1}