Abstract
The mathematical basis for the quantum fluctuation limit is given in [8]. Take any quasi-local system defined on a lattice Zd, let A(x) be any local observable in x ∊ Zd and ρ a state of the system. We assume that the state is space homogeneous: ρ · τx = ρ for all x ∈ Zd, τ x is the space translation automorphism over the distance x. We assume also that the state is time translation invariant. In the applications we take for the state ρ an equilibrium state.
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Verbeure, A., Zagrebnov, V.A. (1994). Quantum Fluctuation Limit: Examples from Solid State Physics. In: Fannes, M., Maes, C., Verbeure, A. (eds) On Three Levels. NATO ASI Series, vol 324. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-2460-1_18
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DOI: https://doi.org/10.1007/978-1-4615-2460-1_18
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