Phys. Rev. A 57, 3184–3187 (1998)Quantum-state sensitivity to initial conditionsReceived 25 November 1997; published in the issue dated May 1998 The different time-dependent distances of two arbitrarily close quantum or classical statistical states to a third fixed state are shown to imply an experimentally relevant notion of state sensitivity to initial conditions. A quantitative classification scheme of quantum states by their sensitivity and instability in state space is given that reduces to the one performed by classical mechanical Lyapunov exponents in the classical limit. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.57.3184
DOI:
10.1103/PhysRevA.57.3184
PACS:
03.65.Bz, 05.45.+b
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