Ultrafast single electron spin manipulation in 2D semiconductor quantum dots with optimally controlled time-dependent electric fields through spin-orbit coupling

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• 作者：Jorge A. Budagosky Marcilla ; Alberto Castro
• 关键词：Solid State and Materials
• 刊名：The European Physical Journal B - Condensed Matter
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：88
• 期：1
• 全文大小：793 KB
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• 作者单位：Jorge A. Budagosky Marcilla (1)
  Alberto Castro (1) (2)
  
  1. Institute for Biocomputation and Physics of Complex Systems, University of Zaragoza, Mariano Esquillor s/n, 50018, Zaragoza, Spain
  2. ARAID Foundation, Edificion CEEI, María Luna 11, 50018, Zaragoza, Spain
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Condensed Matter
  Physics
  Complexity
  Fluids
  Solid State Physics and Spectroscopy
  Superconductivity, Superfluidity and Quantum Fluids
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1434-6036

文摘

We have studied theoretically the possibility of ultra-fast manipulation of a single electron spin in 2D semiconductor quantum dots, by means of high-frequency time-dependent electric fields. The electron spin degree of freedom is excited through spin-orbit coupling, and the procedure may be enhanced by the presence of a static magnetic field. We use quantum optimal control theory to tailor the temporal profile of the electric field in order to achieve the most effective manipulation. The scheme predicts significant control over spin operations in times of the order of picoseconds -an ultrafast time scale that permits to avoid the effects of decoherence if this scheme is to be used as a tool for quantum information processing.