# Is Gravity Just an Illusion Caused by Entropy? New Theory Explains How. Source: https://www.youtube.com/watch?v=qNt2bhPS9ts Recap page: https://rapidrecap.app/video/qNt2bhPS9ts Generated: 2025-10-08T15:32:52.313+00:00 --- ## Quick Overview The video concludes that the theory of Entropic Gravity, which posits gravity arises from entropy changes rather than being a fundamental interaction, is likely flawed because it fails to incorporate necessary quantum symmetries required by Einstein's General Relativity, leading the presenter to rate the idea an 8 out of 10 on the "Bullshit meter" while acknowledging the value of the associated platform, Ground News, for providing balanced media coverage. **Key Points:** - Entropic Gravity suggests gravity is caused by entropy increase, not a fundamental interaction, a concept explored in papers by Ted Jacobson (1995) and Erik Verlinde (2011). - The recent paper "On the Quantum Mechanics of Entropic Forces" by Carney et al. (2025) attempts to derive Newton's laws from quantum bits (qubits) with spin, suggesting gravity is not quantum itself. - The presenter argues that the proposed 'Toy Model' in the recent work lacks the necessary symmetries required to recover Einstein's General Relativity equations, marking it as 'crap' in that regard. - The video rates the current status of Entropic Gravity theories an 8 out of 10 on the "Bullshit meter" due to this fundamental mathematical shortcoming. - The presenter praises the media aggregation platform Ground News, which is featured throughout the video, for its ability to collect and summarize news from various political biases, giving users a balanced view. - Ground News features a 'Blindspot' section to highlight stories disproportionately covered by one side of the political spectrum, such as the California Solar Energy Plant closing being covered 100% by right-leaning sources in one instance. ![Screenshot at 0:01: Introduction screen displaying the title 'Entropic Gravity' next to Sabine Hossenfelder, signaling the video's focus on this non-fundamental approach to gravity.](https://ss.rapidrecap.app/screens/qNt2bhPS9ts/00-00-01.png) **Context:** This video from Sabine Hossenfelder reviews recent provocative ideas in theoretical physics, specifically focusing on Entropic Gravity theories which attempt to derive gravity from thermodynamic principles, particularly entropy, rather than treating it as a fundamental force like the other three forces in the Standard Model of Particle Physics. The discussion centers on two key historical papers and a very recent 2025 paper that tries to formulate this idea using quantum mechanics and qubits, which the presenter critically analyzes for mathematical consistency. ## Detailed Analysis Sabine Hossenfelder discusses the concept of Entropic Gravity, tracing its origins back to Ted Jacobson (1995) and Erik Verlinde (2011), which proposes that gravity is an emergent phenomenon caused by the increase of entropy, similar to how temperature or pressure emerge from particle motion. The main focus is a new 2025 paper, "On the Quantum Mechanics of Entropic Forces," which attempts to model this by suggesting space is occupied by quantum bits (qubits) with spin, leading to an entropic force that mimics gravity. Hossenfelder critiques this new work, stating that while it successfully derives Newton's law, it fails to recover the full symmetries of Einstein's General Relativity, leading her to rate the mathematical underpinning an 8 out of 10 on her "Bullshit meter." She contrasts this with the Standard Model, where all other forces are quantum mechanical, and questions whether gravity, in this entropic view, should still be considered non-quantum. Finally, the video transitions to promoting the Ground News platform, which aggregates news from across the political spectrum, demonstrating its utility by showing how it surfaces politically biased coverage, such as the closure of the Ivanpah Solar Power Facility being reported exclusively by right-leaning sources. ### Entropic Gravity Theories - Originating with Jacobson (1995) and Verlinde (2011) - Gravity is described as an entropic force caused by entropy increase, not a fundamental interaction - This view contrasts with the Standard Model where gravity is hypothesized to be mediated by a graviton. ### Critique of Carney et al. (2025) Paper - New theory uses quantum bits with spin in a 'Toy Model' to derive Newton's laws - The model fails to incorporate necessary symmetries to fully recover Einstein's General Relativity equations - Presenter rates the mathematical foundation an 8/10 on the 'Bullshit meter'. ### Gravitationally Induced Decoherence - The paper suggests that if space is made of qubits, decoherence induced by gravity might be observable, ruling out quantum gravity effects - The presenter finds this prediction questionable. ### Ground News Platform Promotion - The video heavily promotes the Ground News app for providing unbiased news summaries by aggregating sources across the political spectrum - It features a 'Blindspot' tool showing which news outlets disproportionately cover stories from the Left or Right. ![Screenshot at 0:01: Introduction slide explicitly naming the topic: "Entropic Gravity".](https://ss.rapidrecap.app/screens/qNt2bhPS9ts/00-00-01.png) ![Screenshot at 0:08: Text overlay showing the fundamental relation for Jacobson's work: KQ = TAS connecting heat, entropy, and temperature to spacetime horizons.](https://ss.rapidrecap.app/screens/qNt2bhPS9ts/00-00-08.png) ![Screenshot at 0:45: Display of Einstein's field equation juxtaposed with the terms "Entropy?" and "Temperature?", questioning their role in gravity's origin.](https://ss.rapidrecap.app/screens/qNt2bhPS9ts/00-00-45.png) ![Screenshot at 1:00: Introduction of Ted Jacobson, whose 1990s work established the thermodynamic connection to gravity.](https://ss.rapidrecap.app/screens/qNt2bhPS9ts/00-01-00.png) ![Screenshot at 1:19: Title slide of Erik Verlinde's 2011 paper, "On the origin of gravity and the laws of Newton," which advanced the entropic idea.](https://ss.rapidrecap.app/screens/qNt2bhPS9ts/00-01-19.png) ![Screenshot at 1:58: Text overlay asking the central question of the quantum approach: "Entropy of what?"](https://ss.rapidrecap.app/screens/qNt2bhPS9ts/00-01-58.png) ![Screenshot at 2:13: A diagram illustrating a lattice of spins \(arrows\) with a mass 'm' in the center, representing the quantum model basis.](https://ss.rapidrecap.app/screens/qNt2bhPS9ts/00-02-13.png) ![Screenshot at 2:47: A graphic showing the four fundamental forces \(General Relativity, Electromagnetism, Weak Nuclear, Strong Nuclear\) with a question mark asking if they are "all quantum?"](https://ss.rapidrecap.app/screens/qNt2bhPS9ts/00-02-47.png) ![Screenshot at 3:05: Graphic summarizing the entropic gravity chain: mass -\> alignment -\> order, implying mass leads to spin alignment, which creates order.](https://ss.rapidrecap.app/screens/qNt2bhPS9ts/00-03-05.png) ![Screenshot at 4:28: The presenter's "Bullshit meter" pointing strongly into the red zone \(8 out of 10\), indicating strong skepticism about the theory's current mathematical validity regarding GR symmetries.](https://ss.rapidrecap.app/screens/qNt2bhPS9ts/00-04-28.png)