153 citations · 395 across the 4 of their papers we have counts for
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quant-ph1995
The classical limit of quantum theory
R. F. Werner
For a quantum observable depending on a parameter we define the notion `` converges in the classical limit''. The limit is a function on phase space. Con…
cond-mat1995
Boundary conditions for quantum lattice systems
M. Fannes, R. F. Werner
For classical lattice systems, the Dobrushin-Lanford-Ruelle theory of boundary conditions states that the restriction of a global equilibrium state to a subsystem can be obtained a…