# Curie-Weiss model of the quantum measurement process

@inproceedings{Allahverdyan2003CurieWeissMO, title={Curie-Weiss model of the quantum measurement process}, author={Armen E. Allahverdyan and Roger Balian and Th. M. Nieuwenhuizen}, year={2003} }

- Published 2003

– A Hamiltonian model is solved, which satisfies all requirements for a realistic ideal quantum measurement. The system S is a spin1 2 , whose z-component is measured through coupling with an apparatus A = M + B, consisting of a magnet M formed by a set of N 1 spins with quartic infinite-range Ising interactions, and a phonon bath B at temperature T . Initially A is in a metastable paramagnetic phase. The process involves several time-scales. Without being much affected, A first acts on S… CONTINUE READING