Fractional Feynman-Kac equation for non-brownian functionals.
نویسندگان
چکیده
We derive backward and forward fractional Feynman-Kac equations for the distribution of functionals of the path of a particle undergoing anomalous diffusion. Fractional substantial derivatives introduced by Friedrich and co-workers [Phys. Rev. Lett. 96, 230601 (2006)10.1103/PhysRevLett.96.230601] provide the correct fractional framework for the problem. For applications, we calculate the distribution of occupation times in half space and show how the statistics of anomalous functionals is related to weak ergodicity breaking.
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ورودعنوان ژورنال:
- Physical review letters
دوره 103 19 شماره
صفحات -
تاریخ انتشار 2009