Room-temperature implementation of the Deutsch-Jozsa algorithm with a single electronic spin in diamond

12 Feb 2010  ·  Fazhan Shi, Xing Rong, Nanyang Xu, Ya Wang, Jie Wu, Bo Chong, Xinhua Peng, Juliane Kniepert, Rolf-Simon Schoenfeld, Wolfgang Harneit, Mang Feng, Jiangfeng Du ·

The nitrogen-vacancy defect center (NV center) is a promising candidate for quantum information processing due to the possibility of coherent manipulation of individual spins in the absence of the cryogenic requirement. We report a room-temperature implementation of the Deutsch-Jozsa algorithm by encoding both a qubit and an auxiliary state in the electron spin of a single NV center. By thus exploiting the specific S=1 character of the spin system, we demonstrate how even scarce quantum resources can be used for test-bed experiments on the way towards a large-scale quantum computing architecture.

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Quantum Physics