Breakdown of an Electric-Field Driven System: A Mapping to a Quantum Walk
2005; American Physical Society; Volume: 94; Issue: 10 Linguagem: Inglês
10.1103/physrevlett.94.100602
ISSN1092-0145
AutoresTakashi Oka, Norio Konno, Ryotaro Arita, Hideo Aoki,
Tópico(s)Advancements in Semiconductor Devices and Circuit Design
ResumoQuantum transport properties of electron systems driven by strong electric fields are studied by mapping the Landau-Zener transition dynamics to a quantum walk on a semi-infinite one-dimensional lattice with a reflecting boundary, where the sites correspond to energy levels and the boundary the ground state. Quantum interference induces a distribution localized around the ground state, and a delocalization transition occurs when the electric field is increased, which describes the dielectric breakdown in the original electron system.
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