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6CCVD Research

Experimental test of Leggett's inequalities with solid-state spins

At a Glance

Section titled “At a Glance”
MetadataDetails
Publication Date2020-07-09
JournalPhysical review. A/Physical review, A
AuthorsXianzhi Huang, Xiaolong Ouyang, Wenqian Lian, Wengang Zhang, Xin Wang
InstitutionsTsinghua University
Citations2

Abstract

Section titled “Abstract”

Bell’s theorem states that no local hidden variable model is compatible with quantum mechanics. Surprisingly, even if we release the locality constraint, certain nonlocal hidden variable models, such as the one proposed by Leggett, may still be at variance with the predictions of quantum physics. Here, we report an experimental test of Leggett’s nonlocal model with solid-state spins in a diamond nitrogen-vacancy center. We entangle an electron spin with a surrounding weakly coupled $^{13}C$ nuclear spin and observe that the entangled states violate Leggett-type inequalities by more than four and seven standard deviations for six and eight measurement settings, respectively. Our experimental results are in full agreement with quantum predictions and violate Leggett’s nonlocal hidden variable inequality with a high level of confidence.

Tech Support

Section titled “Tech Support”

Original Source

Section titled “Original Source”

References

Section titled “References”
  1. 2004 - Speakable and Unspeakable in Quantum Mechanics: Collected Papers on Quantum Philosophy [Crossref]

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