Temperature crossover of decoherence rates in chaotic and regular bath dynamics

Details Temperature crossover of decoherence rates in chaotic and regular bath dynamics Temperature crossover of decoherence rates in chaotic and regular bath dynamics

2012-03-21

arxiv.org/abs/1203.4629v2

Phys. Rev. E 85, 036218 (2012)

Physics

Quantum Physics

7 pages, 3 figures

Scientific paper

10.1103/PhysRevE.85.036218

The effect of chaotic bath dynamics on the decoherence of a quantum system is examined for the vibrational degrees of freedom of a diatomic molecule in a realistic, constant temperature collisional bath. As an example, the specific case of I$_2$ in liquid xenon is examined as a function of temperature, and the results compared with an integrable xenon bath. A crossover in behavior is found: the integrable bath induces more decoherence at low bath temperatures than does the chaotic bath, whereas the opposite is the case at the higher bath temperatures. These results, verifying a conjecture due to Wilkie, shed light on the differing views of the effect of chaotic dynamics on system decoherence.

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