Sites log: Verlinde-Erik

Run 1: 2026-10-04 (Investigator, Step I). First run, so there was nothing to recheck. Browsing took about 4.5 minutes by date +%s (1791148018 to 1791148292), within the 10-minute cap; it was stopped early to write up and leave the queue below for the next run. Downloads: none. Downloading a file needs the owner's explicit permission in the session, so every useful document is recorded by URL (all are open access: arXiv, Nature Communications CC BY, World Scientific free access).

Keywords tried

• Verlinde, Erik (arXiv author search URL, not loaded); arXiv author id verlinde_e_1 (404)
• "Verlinde" entropic gravity arXiv 2016 OR 2020 OR 2023 OR 2024 OR 2025 "emergent gravity"
• INSPIRE a E.P.Verlinde.1 (sort mostrecent)
• Erik Verlinde Spinozapremie 2011 zwaartekracht entropie (Dutch)
• "Verlinde" "Is Einstein een beetje achterhaald" Volkskrant 2009
• quantumuniverse.nl "De zwaartekracht als entropische kracht"
• Verlinde "Hidden Phase Space of our Universe" Strings 2011 Uppsala
• "Why does gravity know about microscopic entropy" Verlinde
• GQuEST interferometer Zurek Verlinde spacetime fluctuations experiment results
• arxiv "Response of interferometers to the vacuum of quantum gravity" Carney
• Direct arXiv IDs: 1611.02269, 1612.03034, 2106.11677, 1009.5414, 1104.4650, 1902.08207, 2404.07524, 2409.03894, 1706.00785, 1108.5240

Keywords for the next run (not yet tried): "entropic force" "holographic screen" equipartition criticism; "Verlinde" "Bekenstein bound" holographic screen; "Unruh temperature" "Newton's second law" entropic inertia; "Chen Li" "first law of thermodynamics on holographic screens" (PLB 700, 380, 2011); GRANIT neutron "excited state" decay result; GQuEST 2025 OR 2026 results; "KiDS" "emergent gravity" 2023..2026; "Verlinde" "Tully-Fisher" "apparent dark matter" cluster test; Herman Verlinde (twin brother, frequent co-author; avoid confusion); "Verlinde" 2010 Utrecht colloquium; Delpher/LexisNexis "Verlinde zwaartekracht" Dec 2009; Hossenfelder "Comments on and comments on comments on Verlinde" (title from memory, low confidence).

Leads for review

1. The inventor's own work

• Verlinde 2026, IJMPA 41(26) 2647002, "Why does gravity know about microscopic entropy?" (Festschrift for 't Hooft). [web] https://www.worldscientific.com/doi/10.1142/S0217751X26470020. Restates claims 1-2 as an "adiabatic reaction force" (Born-Oppenheimer, Hertz phase-space invariant). States that an entropic force "acts without increasing the entropy" and that the sign comes out right only because S is invariant (bears on the deep read's sign notes for 4.25 and 5.27/5.30). Says the slow system keeps its quantum coherence in the Born-Oppenheimer regime, which answers the neutron and decoherence objections. Ties Jacobson's derivation to Wald entropy as "the reverse argument" (claim 4 and the circularity question). Dates the first presentation to a Dec 2009 Utrecht colloquium and names inertia as his addition to Jacobson's argument.
• Verlinde 2016, "Emergent Gravity and the Dark Universe", arXiv:1611.02269, SciPost Phys. 2, 016 (2017). [web] https://arxiv.org/abs/1611.02269. This turns the 2010 interpretation into a model with a new low-acceleration prediction (an extra "dark gravity" force set by a_0 = cH_0) and adds a volume-law entropy. Bears on claims 5 and 6. Reviewers should note that its assumptions differ from the 2010 paper's (area law only).
• Verlinde & Zurek 2019/2021, arXiv:1902.08207, PLB 822, 136663; also 1911.02018 (JHEP 2020) and 2208.01059 (PRD 2022). [web] These make claim 6 (fluctuations) quantitative, as "geontropic" spacetime fluctuations observable in interferometers.
• Strings 2011 talk "The Hidden Phase Space of Our Universe" (slides: member.ipmu.jp mirror; video: YouTube T1rxAhUl5BE). [web] The first dark-matter extension. Not yet read.
• Publication record: the project paper is JHEP 04 (2011) 029 (INSPIRE). Compare it with arXiv v1, the project copy, for changes. Also a 2020 proceedings item, "Entropy, Gravity and Galactic Dynamics" (pp.187-191, volume not identified).

2. Supporting information by others

• Brouwer et al. 2017, MNRAS 466, 2547 (KiDS x GAMA, 33,613 galaxies). The EG prediction, with no free parameters, is "in good agreement" with galaxy-galaxy lensing in four mass bins. The authors call it "only a first step". [web] https://arxiv.org/abs/1612.03034
• Brouwer et al. 2021, A&A 650, A113 (KiDS-1000 lensing RAR; Verlinde is a co-author, so an interested party). The RAR "agrees well" with MOND and EG predictions. However, a difference of at least 6 sigma between early- and late-type galaxies is something current MG theories "would be unable to explain" unless circumgalactic gas is added. LambdaCDM (MICE) also fits. [web] https://arxiv.org/abs/2106.11677
• Chaichian, Oksanen, Tureanu 2011, PLB 702, 419: EG does not necessarily contradict GRANIT bound neutron states. Spontaneous decays of excited states, which future experiments could observe, would need extra ingredients. [web] https://arxiv.org/abs/1104.4650
• GQuEST (Vermeulen et al., PRX 15, 011034, 2025): a tabletop photon-counting interferometer designed to detect Verlinde-Zurek "geontropic" fluctuations. It is a design paper; no result was found yet. [web] https://arxiv.org/abs/2404.07524
• Vonk 2012 (quantumuniverse.nl): a plain-language Dutch explainer of the polymer analogy, useful for the primer. [web]
• Pardo 2017/2020 (partly supportive): EG reproduces Tully-Fisher with no free parameters and fits massive spirals. See priority 3 for the dwarf-galaxy result.

3. Closely related work (including critiques, recorded as the sources' own characterizations)

• Jacobson 1995 (PRL 75, 1260) and Padmanabhan 2010 (Rep. Prog. Phys. 73, 046901): the thermodynamic derivations of gravity that Verlinde builds on. The 2026 note names Jacobson as the closest precursor. Bianconi 2025, "Gravity from entropy" (PRD 111, 066001), is a later entropic approach. Parker & Jeynes (QGT, 2019/2021) is another entropic approach. Immediate 2010 follow-ups: Cai-Cao-Ohta (Friedmann equations), Easson-Frampton-Smoot (accelerating universe), Smolin (LQG), Shu-Gong, Lee-Kim-Lee. [web, via Wikipedia]
• Visser 2011, JHEP 10, 140: "real and significant problems" for Verlinde-type entropic Newtonian gravity with general potentials. Multiple heat baths are needed. This bears on Section 4 of the paper (claim 3). [web] https://arxiv.org/abs/1108.5240
• Wang & Braunstein 2018, Nat. Commun. 9, 2977: holographic screens away from horizons fail the first law except under spherical symmetry, "undermining the key thermodynamic assumption" (claims 1, 3, 4). A reader comment argues this does not apply to the 2016 volume-law model. [web] https://www.nature.com/articles/s41467-018-05433-9
• Kobakhidze 2011, PRD 83, 021502: ultra-cold neutron bound states "disprove" entropic gravity (claims 1, 6). [web] https://arxiv.org/abs/1009.5414. Inventor's response in principle: the coherence argument in the 2026 note.
• Pardo 2020, JCAP 12, 012: for 452 isolated dwarfs, EG "severely underpredicts" maximum velocities above ~100 km/s and overpredicts below. [web] https://arxiv.org/abs/1706.00785
• Nieuwenhuizen 2017, Fortschr. Phys. 65, 1600050: Abell 1689 lensing rules out EG without eV neutrinos. [web, via Wikipedia; primary not opened]
• Carney, Karydas, Sivaramakrishnan 2026, PRD 113, 106002: standard graviton effective field theory predicts Delta L ~ 1e-35 m, so a large interferometer signal would mean EFT breaks down. This sets out what GQuEST would decide. [web] https://arxiv.org/abs/2409.03894
• Tower Wang 2012 (arXiv:1211.5722) and Mäkelä 2010 (arXiv:1001.3808): not opened.

4. Historical record

• 12 Dec 2009: first public announcement in de Volkskrant (van Calmthout, "Is Einstein een beetje achterhaald?"). Blocked this run. In the same month (per Verlinde 2026) came the Utrecht University colloquium attended by 't Hooft. 6 Jan 2010: arXiv:1001.0785. [web]
• 2010: wide press coverage (NYT 12 Jul 2010; New Scientist 20 Jan 2010; Wired). Strominger quoted as saying reactions ranged from "can't be right" to "right and we already knew it". [web, via Wikipedia]
• 6 Jun 2011: NWO Spinoza Prize, EUR 2.5 million (ScienceGuide; Astroblogs). 1 Jul 2011: Strings 2011 talk. Apr 2011: JHEP publication. [web]
• Nov 2016: EG paper, with Dutch national news coverage (NOS). Dec 2016: the Leiden lensing test. 2021: KiDS-1000 RAR. 2025: GQuEST design published. 2026: Festschrift note. The record does not go silent; the programme continues in mainstream journals. [web]