出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We point out that in quantum systems with many degrees of freedom the quantum entanglement of inaccessible regions generates a back-reaction which may modify the dynamics of the system. In particular we argue that in 1+1 dimensional quantum systems described by conformal field theory (CFT) the back-reaction of the inaccessible subsystems has the same effect as the coupling to 2D quantum gravity. Numerical experiments on critical 2D Ising models show that the universality class is modified by such a back-reaction and that the new critical exponents agree with those predicted by the formula of Knizhnik, Polyakov and Zamolodchikov.
