Spin quantum information transfer using dynamic quantum dots

2014 Fiscal Year Final Research Report

• Project/Area Number: 24686004
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Applied materials science/Crystal engineering
• Research Institution: NTT Basic Research Laboratories
• Principal Investigator: SANADA Haruki 日本電信電話株式会社NTT物性科学基礎研究所, 量子光物性研究部, 主任研究員 (50417094)
• Research Collaborator: KUNIHASHI Yoji ; GOTOH Hideki ; ONOMITSU Koji ; KOHDA Makoto ; NITTA Junsaku ; SANTOS Paulo V. ; SOGAWA Tetsuomi
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: スピン / スピン軌道相互作用 / 表面弾性波 / 電子スピン共鳴 / 量子ドット

Outline of Final Research Achievements

Electron spins are possible candidates as qubits for solid state quantum computer. The most promising approach for spin control is based on electron spin resonance (ESR). However, ESR requires external magnetic fields, which are generated in spaces that greatly exceed individual electrons, thus making these complex and inefficient techniques unsuitable for device applications. We carried out spin transport experiments using trajectly-controlled "dynamic dots", which are realized by applying surface acoustic waves on semiconductor quantum wells. We observed the spin behavior of ESR even in the absence of external magnetic fields. This phenomenon allows us to manipulate spins in any three-dimensional direction by designing appropriate channel structures.

Free Research Field

半導体スピントロニクス