Preserving electron spin coherence in solids by optimal dynamical decoupling

Jiangfeng Du (), Xing Rong, Nan Zhao, Ya Wang, Jiahui Yang and R. B. Liu ()
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Jiangfeng Du: University of Science and Technology of China, Hefei, Anhui 230026, China
Xing Rong: University of Science and Technology of China, Hefei, Anhui 230026, China
Nan Zhao: The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
Ya Wang: University of Science and Technology of China, Hefei, Anhui 230026, China
Jiahui Yang: University of Science and Technology of China, Hefei, Anhui 230026, China
R. B. Liu: The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China

Nature, 2009, vol. 461, issue 7268, 1265-1268

Abstract: Quantum computing: cutting out the noise If electron spins in solid materials are to be exploited in quantum computers, there is a need to minimize the quantum 'noise' that inevitably accompanies the interaction of the spins with their environment. Experiments in single crystals of malonic acid undergoing pulsed electron paramagnetic resonance now show how this can be achieved. The use of external pulses to induce the electron spins to 'flip' an optimal number of times causes their noisy interaction with the environment to be averaged towards zero, and the timescale over which spin coherence is maintained is markedly increased — from 0.04 to 30 microseconds in the system studied.

Date: 2009
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DOI: 10.1038/nature08470

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