Publication Date:
2018-10-06
Description:
Author(s): J. T. Muhonen, J. P. Dehollain, A. Laucht, S. Simmons, R. Kalra, F. E. Hudson, A. S. Dzurak, A. Morello, D. N. Jamieson, J. C. McCallum, and K. M. Itoh At the heart of quantum mechanics is the idea that we cannot observe a physical system without affecting it. This is normally taken to mean that the act of measurement produces uncontrolled disturbances, and “collapses” quantum superposition states. Here, the authors demonstrate the preparation of arbitrary quantum states of the nuclear spin of a single 31 P donor in silicon, while operating and measuring only the donor-bound electron. The “partial collapse” resulting from a sequence of weak nuclear spin measurement is shown to be a fully coherent process, which can even be reversed. The change in the nuclear spin state can also be used as a physical meter to probe the measurement strength, proportional to the electron tunnel rate, by analyzing events where no tunneling occurs. [Phys. Rev. B 98, 155201] Published Fri Oct 05, 2018
Keywords:
Semiconductors I: bulk
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
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