Super Bloch oscillation in a PT symmetric system

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Turker Z., Yuce C.

PHYSICS LETTERS A, cilt.380, sa.29-30, ss.2260-2264, 2016 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 380 Sayı: 29-30
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1016/j.physleta.2016.05.008
  • Dergi Adı: PHYSICS LETTERS A
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2260-2264
  • Anahtar Kelimeler: PT symmetry, Non-Hermitian Hamiltonians, Super Bloch oscillation
  • Anadolu Üniversitesi Adresli: Evet

Özet

Wannier-Stark ladder in a PT symmetric system is generally complex that leads to amplified/damped Bloch oscillation. We show that a non-amplified wave packet oscillation with very large amplitude can be realized in a non-Hermitian tight binding lattice if certain conditions are satisfied. We show that pseudo PT symmetry guarantees the reality of the quasi energy spectrum in our system. (C) 2016 Elsevier B.V. All rights reserved.