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Stochastic webs and quantum transport in superlattices: an introductory review

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Stochastic webs were discovered, first by Arnold for multi-dimensional Hamiltonian systems, and later by Chernikov et al. for the low-dimensional case. Generated by weak perturbations, they consist of thread-like regions of chaotic dynamics in phase space. Their importance is that, in principle, they enable transport from small energies to high energies. In this introductory review, we concentrate on low-dimensional stochastic webs and on their applications to quantum transport in semiconductor superlattices subject to electric and magnetic fields. We also describe a recently-suggested modification of the stochastic web to enhance chaotic transport through it and we discuss its possible applications to superlattices.

Keywords: quantum transport; separatrix chaos; stochastic webs; superlattices

Document Type: Research Article


Affiliations: 1: Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, Ukraine,Abdus Salam ICTP, Italy,Physics Department, Lancaster University, Lancaster, UK 2: Physics Department, Lancaster University, Lancaster, UK 3: School of Physics and Astronomy, University of Nottingham, Nottingham, UK 4: School of Engineering, University of Warwick, Coventry, UK 5: Dipartimento di Fisica, Universita di Pisa, Pisa, Italy

Publication date: May 1, 2010

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