A single-atom quantum memory in silicon

Solomon Freer, Stephanie Simmons, Arne Laucht, Juha T. Muhonen, Juan P. Dehollain, Rachpon Kalra, Fahd A. Mohiyaddin, Fay E. Hudson, Kohei M. Itoh, Jeffrey C. McCallum, David N. Jamieson, Andrew S. Dzurak, Andrea Morello

研究成果: Article査読

31 被引用数 (Scopus)


Long coherence times and fast gate operations are desirable but often conflicting requirements for physical qubits. This conflict can be resolved by resorting to fast qubits for operations, and by storing their state in a 'quantum memory' while idle. The 31 P donor in silicon comes naturally equipped with a fast qubit (the electron spin) and a long-lived qubit (the 31 P nuclear spin), coexisting in a bound state at cryogenic temperatures. Here, we demonstrate storage and retrieval of quantum information from a single donor electron spin to its host phosphorus nucleus in isotopically enriched 28 Si. The fidelity of the memory process is characterised via both state and process tomography. We report an overall process fidelity %, and memory storage times up to 80 ms. These values are limited by a transient shift of the electron spin resonance frequency following high-power radiofrequency pulses.

ジャーナルQuantum Science and Technology
出版ステータスPublished - 2017 3月 1

ASJC Scopus subject areas

  • 原子分子物理学および光学
  • 材料科学(その他)
  • 物理学および天文学(その他)
  • 電子工学および電気工学


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