Journal
PHYSICAL REVIEW LETTERS
Volume 123, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.123.200501
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Funding
- National Science Foundation [DGE-1842474, PHY-1720395]
- Google Inc.
- NSF STAQ project [PHY-1818914]
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Contextuality is an indicator of nonclassicality, and a resource for various quantum procedures. In this Letter, we use contextuality to evaluate the variational quantum eigensolver (VQE), one of the most promising tools for near-term quantum simulation. We present an efficiently computable test to determine whether or not the objective function for a VQE procedure is contextual. We apply this test to evaluate the contextuality of experimental implementations of VQE, and determine that several, but not all, fail this test of quantumness.
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