Quantum-classical transition in nonlinear dynamical systems.
نویسندگان
چکیده
Viewed as approximations to quantum mechanics, classical evolutions can violate the positive semidefiniteness of the density matrix. The nature of the violation suggests a classification of dynamical systems based on classical-quantum correspondence; we show that this can be used to identify when environmental interaction (decoherence) will be unsuccessful in inducing the quantum-classical transition. In particular, the late-time Wigner function can become positive without any corresponding approach to classical dynamics. In the light of these results, we emphasize key issues relevant for experiments studying the quantum-classical transition.
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ورودعنوان ژورنال:
- Physical review letters
دوره 88 4 شماره
صفحات -
تاریخ انتشار 2002