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Levitating microdiamonds towards testing the macroscopic limits of the quantum superposition principle



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19120027

Abstract

We are building an experiment in which a levitated 1 µm diamond containing a nitrogen vacancy (NV) centre would be put into a spatial quantum superposition [1-3]. This would be able to test theories of spontaneous wavefunction collapse [4]. We have helped theory collaborators to propose how to do this experiment [5-9], as well as a much more experimentally ambitious extension which would test if gravity permits a quantum superposition [10]. There are related proposals from other groups [11-13].
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[9] J. S. Pedernales, G. W. Morley & M. B. Plenio, arXiv:1906.00835 (2019).
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[11] Z.-q. Yin, T. Li, X. Zhang & L. M. Duan, PRA 88, 033614 (2013).
[12] A. Albrecht, A. Retzker & M. B. Plenio, PRA 90, 033834 (2014).
[13] C. Marletto & V. Vedral, PRL 119, 240402 (2017).