Wannier-Stark states in double-periodic lattices. I. One-dimensional lattices

Описание

Тип публикации: статья из журнала

Год издания: 2015

Идентификатор DOI: 10.1103/PhysRevA.91.053631

Ключевые слова: Ladders, Analytical expressions, One-dimensional lattice, Periodic lattices, Quantum particles, Static fields, Strong-coupling regime, Two-level system, Wannier-Stark ladder, Superlattices

Аннотация: We analyze the Wannier-Stark spectrum of a quantum particle in generic one-dimensional double-periodic lattices. In the limit of a weak static field, the spectrum is shown to be a superposition of two Wannier-Stark ladders originating from two Bloch subbands. As the strength of the field is increased, the spectrum rearranges itselfПоказать полностьюinto a single Wannier-Stark ladder. We derive analytical expressions that describe the rearrangement employing the analogy between the Wannier-Stark problem and a driven two-level system in the strong-coupling regime.

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Издание

Журнал: PHYSICAL REVIEW A

Выпуск журнала: Vol. 91, Is. 5

ISSN журнала: 10502947

Место издания: COLLEGE PK

Издатель: AMER PHYSICAL SOC

Персоны

  • Maksimov D.N. (Kirensky Institute of Physics)
  • Bulgakov E.N. (Siberian State Aerospace University)
  • Kolovsky A.R. (Siberian Federal University)