The Quantum Emergence of Chaos

Details The Quantum Emergence of Chaos The Quantum Emergence of Chaos

2004-12-21

arxiv.org/abs/quant-ph/0412159v1

Phys. Rev. Lett. 96, 010403 (2006)

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.96.010403

The dynamical status of isolated quantum systems, partly due to the linearity of the Schrodinger equation is unclear: Conventional measures fail to detect chaos in such systems. However, when quantum systems are subjected to observation -- as all experimental systems must be -- their dynamics is no longer linear and, in the appropriate limit(s), the evolution of expectation values, conditioned on the observations, closely approaches the behavior of classical trajectories. Here we show, by analyzing a specific example, that microscopic continuously observed quantum systems, even far from any classical limit, can have a positive Lyapunov exponent, and thus be truly chaotic.

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