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Braunstein-Ghosh-Severini Entropy : ウィキペディア英語版 | Braunstein-Ghosh-Severini Entropy In network theory, the Braunstein-Ghosh-Severini entropy〔Samuel L. Braunstein, Sibasish Ghosh, Simone Severini, The laplacian of a graph as a density matrix: a basic combinatorial approach to separability of mixed states, ''Annals of Combinatorics'', 10, No 3, 2006.〕〔Kartik Anand, Ginestra Bianconi, Entropy measures for networks: Toward an information theory of complex topologies, ''Phys. Rev. E'' 80, 045102(R) (2009).〕 (BGS entropy) of a network is the von Neumann entropy of a density matrix given by a normalized Laplacian matrix of the network. This definition of entropy does not have a clear thermodynamical interpretation. The BGS entropy has been used in the context of quantum gravity.〔Carlo Rovelli, Francesca Vidotto, Single particle in quantum gravity and Braunstein-Ghosh-Severini entropy of a spin network, ''Phys. Rev. D'' 81, 044038 (2010).〕 ==Notes and references==
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