Numerical test of the Edwards conjecture shows that all packings are equally probable at jamming

Stefano Martiniani, KJ Schrenk, K Ramola, B Chakraborty & Daniel Frenkel
In the late 1980s, Sam Edwards proposed a possible statistical-mechanical framework to describe the properties of disordered granular materials1. A key assumption underlying the theory was that all jammed packings are equally likely. In the intervening years it has never been possible to test this bold hypothesis directly. Here we present simulations that provide direct evidence that at the unjamming point, all packings of soft repulsive particles are equally likely, even though generically, jammed packings...
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