A Scientist Takes On Gravity. It From Bit: The Case Of Gravity. Three weeks of speculations have come to an end.
Since this morning Verlinde's paper is available on arXiv. I encourage you to give it a try. The article is well written and the math is limited to fairly basic stuff. This combination makes it a relatively easy read. Granted, the paper requires some more gray matter cells being active than the average “Hammock Physicist” blog entry, but for an average Hammock Physicist reader probably not by an insurmountable amount. The crux of the article can be summarized in one sentence: If it smells like entropy, and it behaves like entropy, it probably is entropy. As was suggested before, one can consider Verlinde's starting point to be a reversal of concepts like the Hawking temperature of black holes and the Unruh effect.
Subsequently, Verlinde takes a deep dive: if an acceleration is proportional to a temperature, it has all the characteristics of an entropic effect. Where represents the Newtonian gravitational potential. To be continued... The entropy force: a new direction for gravity - physics-math - Editorial: A gravity story to take us out of Newton's orchard WHAT exactly is gravity?
Everybody experiences it, but pinning down why the universe has gravity in the first place has proved difficult. Although gravity has been successfully described with laws devised by Isaac Newton and later Albert Einstein, we still don't know how the fundamental properties of the universe combine to create the phenomenon. Now one theoretical physicist is proposing a radical new way to look at gravity. Erik Verlinde of the University of Amsterdam, the Netherlands, a prominent and internationally respected string theorist, argues that gravitational attraction could be the result of the way information about material objects is organised in space.
Technology Review: Blogs: arXiv blog: Gravity Emerges from Quant. One of the hottest new ideas in physics is that gravity is an emergent phenomena; that it somehow arises from the complex interaction of simpler things.
A few month’s ago, Erik Verlinde at the the University of Amsterdam put forward one such idea which has taken the world of physics by storm. Verlinde suggested that gravity is merely a manifestation of entropy in the Universe. His idea is based on the second law of thermodynamics, that entropy always increases over time. It suggests that differences in entropy between parts of the Universe generates a force that redistributes matter in a way that maximises entropy. This is the force we call gravity. What’s exciting about the approach is that it dramatically simplifies the theoretical scaffolding that supports modern physics. But perhaps the most powerful idea to emerge from Verlinde’s approach is that gravity is essentially a phenomenon of information. Jae-Weon and co assume that this erasure process must occur at the black hole horizon.
FQXiComm:Myth Gravity. The Myth of Gravity A new model in which gravity is not a fundamental force could—counterintuitively—give a controversial quantum gravity theory a boost. It may also change our picture of spacetime, and do away with dark energy. by Sophie Hebden April 24, 2010 Erik VerlindeUniversity of Amsterdam When thieves stole Erik Verlinde’s laptop and keys, while he was holidaying in the south of France, they could have had little notion that their crime would lead to a new model for gravity.
Gravity may be the force that we are most familiar with in everyday life, but physicists do not yet understand its origin. Verlinde, a string theorist at the University of Amsterdam in the Netherlands, believes that the key to understanding gravity is "information. " Entropic force? The work has been causing a stir amongst physicists. It might sound like re-inventing the wheel, but the approach implies that gravity is nothing more than the result of a system maximising its entropy, or disorder. . - Paul Frampton. A New View Of Gravity. W24 - NU! Nederlander bedenkt revolutionaire zwaartekrachttheori. NRC interview 2007.
Entropic force. Diffusion from a microscopic and macroscopic point of view.
Initially, there are solute molecules on the left side of a barrier (purple line) and none on the right. The barrier is removed, and the solute diffuses to fill the whole container. Top: A single molecule moves around randomly. Middle: With more molecules, there is a statistical trend that the solute fills the container more and more uniformly. Bottom: With an enormous number of solute molecules, all randomness is gone: The solute appears to move smoothly and deterministically from high-concentration areas to low-concentration areas. In physics, an entropic force acting in a system is a phenomenological force resulting from the entire system's statistical tendency to increase its entropy, rather than from a particular underlying microscopic force. Mathematical formulation In the canonical ensemble, the entropic force associated to a macrostate partition is given by:  where is the temperature, and Examples
Ideal chain. An ideal chain (or freely-jointed chain) is the simplest model to describe polymers, such as nucleic acids and proteins. It only assumes a polymer as a random walk and neglects any kind of interactions among monomers. Although it is simple, its generality gives us some insights about the physics of polymers. In this model, monomers are rigid rods of a fixed length l, and their orientation is completely independent of the orientations and positions of neighbouring monomers, to the extent that two monomers can co-exist at the same place.
The model N monomers form the polymer, whose total unfolded length is: , where N is the number of monomers. In this very simple approach where no interactions between monomers are considered, the energy of the polymer is taken to be independent of its shape, which means that at thermodynamic equilibrium, all of its shape configurations are equally likely to occur as the polymer fluctuates in time, according to the Maxwell–Boltzmann distribution. Since and. Emergence. In philosophy, systems theory, science, and art, emergence is conceived as a process whereby larger entities, patterns, and regularities arise through interactions among smaller or simpler entities that themselves do not exhibit such properties.
In philosophy, almost all accounts of emergence include a form of irreducibility (either epistemic or ontological) to the lower levels. Also, emergence is central in theories of integrative levels and of complex systems. For instance, the phenomenon life as studied in biology is commonly perceived as an emergent property of interacting molecules as studied in chemistry, whose phenomena reflect interactions among elementary particles, modeled in particle physics, that at such higher mass—via substantial conglomeration—exhibit motion as modeled in gravitational physics.
Definitions The idea of emergence has been around since at least the time of Aristotle. The term "emergent" was coined by philosopher G. Strong and weak emergence Dutch string theorist Erik Verlinde: gravity does not exist. The. Marie Curie. Colloquium Erik Verlinde. Zware klap voor zwaartekracht. The entropic origin of gravity sur Flickr : partage de photos !
Introducing the Professor Doctor sur Flickr : partage de photos Yeah, what about it ? sur Flickr : partage de photos ! Multitasking sur Flickr : partage de photos ! That was elegant sur Flickr : partage de photos ! Folia 4 juni 2010 pp10-11. De boekhouder van het heelal. UvA - De zwaartekracht van Erik Verlinde.