Single-shot readout of an electron spin in silicon

The size of silicon transistors used in microelectronic devices is shrinking to the level where quantum effects become important. While this presents a significant challenge for the further scaling of microprocessors, it provides the potential for radical innovations in the form of spin-based quantu...

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Bibliographic Details
Published in:arXiv.org 2010-05
Main Authors: Morello, Andrea, Pla, Jarryd J, Zwanenburg, Floris A, Chan, Kok W, Huebl, Hans, Mottonen, Mikko, Nugroho, Christopher D, Yang, Changyi, van Donkelaar, Jessica A, Alves, Andrew D C, Jamieson, David N, Escott, Christopher C, Hollenberg, Lloyd C L, Clark, Robert G, Dzurak, Andrew S
Format: Article
Language:English
Subjects:
Electron spin
Electrons
Metal oxides
Microelectronics
Microprocessors
Quantum computers
Quantum computing
Quantum theory
Qubits (quantum computing)
Semiconductor devices
Shot
Silicon transistors
Single-electron transistors
Spin-orbit interactions
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Summary:The size of silicon transistors used in microelectronic devices is shrinking to the level where quantum effects become important. While this presents a significant challenge for the further scaling of microprocessors, it provides the potential for radical innovations in the form of spin-based quantum computers and spintronic devices. An electron spin in Si can represent a well-isolated quantum bit with long coherence times because of the weak spin-orbit coupling and the possibility to eliminate nuclear spins from the bulk crystal. However, the control of single electrons in Si has proved challenging, and has so far hindered the observation and manipulation of a single spin. Here we report the first demonstration of single-shot, time-resolved readout of an electron spin in Si. This has been performed in a device consisting of implanted phosphorus donors coupled to a metal-oxide-semiconductor single-electron transistor - compatible with current microelectronic technology. We observed a spin lifetime approaching 1 second at magnetic fields below 2 T, and achieved spin readout fidelity better than 90%. High-fidelity single-shot spin readout in Si opens the path to the development of a new generation of quantum computing and spintronic devices, built using the most important material in the semiconductor industry.
ISSN:2331-8422
DOI:10.48550/arxiv.1003.2679