Quantum dynamics of a particle in the vicinity of a hyperbolic point is considered. Expectation values of dynamical variables are calculated, and the singular behavior is analyzed. Exponentially fast extension of quantum dynamics is obtained, and conditions for this realization are analyzed.
Estimating the expectation values of spin 1/2 observables with finite resources
Quantum Dynamics of Topological Singularities: Feynman's Influence Functional Approach
Quantum dynamics and entanglement in coherent transport of atomic population
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