Multiphoton Processes in Driven Mesoscopic Systems

Details Multiphoton Processes in Driven Mesoscopic Systems Multiphoton Processes in Driven Mesoscopic Systems

2006-11-03

arxiv.org/abs/cond-mat/0611083v2

Phys. Rev. B 76, 165303 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 5 figures, extended version

Scientific paper

10.1103/PhysRevB.76.165303

We study the statistics of multi-photon absorption/emission processes in a mesoscopic ring threaded by an harmonic time-dependent flux $\Phi(t)$. For this sake, we demonstrate a useful analogy between the Keldysh quantum kinetic equation for the electrons distribution function and a Continuous Time Random Walk in energy space with corrections due to interference effects. Studying the probability to absorb/emit $n$ quanta $\hbar\omega$ per scattering event, we explore the crossover between ultra-quantum/low-intensity limit and quasi-classical/high-intensity regime, and the role of multiphoton processes in driving it.

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