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Open Quantum Systems Decoherence Superconducting Qubits

Leggett-Garg test of superconducting qubit addressing the clumsiness loophole

arXiv
Authors: Emilie Huffman, Ari Mizel

Year

2016

Paper ID

43488

Status

Preprint

Abstract Read

~2 min

Abstract Words

93

Citations

N/A

Abstract

The Leggett-Garg inequality holds for any macrorealistic system that is being measured noninvasively. A violation of the inequality can signal that a system does not conform to our primal intuition about the physical world. Alternatively, a violation can simply indicate that "clumsy" experimental technique led to invasive measurements. Here, we consider a recent Leggett-Garg test designed to try to rule out the mundane second possibility. We tailor this Leggett-Garg test to the IBM 5Q Quantum Experience system and find compelling evidence that qubit Q2 of the system cannot be described by noninvasive macrorealism.

Why This Paper Matters

  • This paper contributes to the Superconducting Qubits research area in the Quantum Articles archive.
  • It adds a 2016 reference point for readers tracking recent quantum research.
  • The Leggett-Garg inequality holds for any macrorealistic system that is being measured noninvasively.

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