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Revisiting the Experimental Test of Mermin’s Inequalities at IBMQ

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Abstract

Bell-type inequalities allow for experimental testing of local hidden variable theories. In the present work we show the violation of Mermin’s inequalities in IBM’s five-qubit quantum computers, ruling out the local realism hypothesis in quantum mechanics. Furthermore, our numerical results show significant improvement with respect to previous implementations. The circuit implementation of these inequalities is also proposed as a way of assessing the reliability of different quantum computers.

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Notes

  1. See [9] for further details.

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Acknowledgements

We thank B. Zaldívar, A. Casas, E. López and G. Sierra for insightful conversations and advice. We also thank the IBM Quantum team for making multiple devices available via the IBM Quantum Experience. The access to the IBM Quantum Experience has been provided by the CSIC IBM Q Hub.

Funding

This work was done with financial support from the Universidad Autónoma de Madrid through the grant “Ayudas de Investigación en Estudios de Máster”.

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Authors and Affiliations

  1. Instituto de Física Teórica UAM-CSIC, Universidad Autónoma de Madrid, Cantoblanco, Madrid, Spain

    Diego González, Diego Fernández de la Pradilla & Guillermo González

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  1. Diego González
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  2. Diego Fernández de la Pradilla
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  3. Guillermo González
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Correspondence to Diego Fernández de la Pradilla.

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González, D., de la Pradilla, D.F. & González, G. Revisiting the Experimental Test of Mermin’s Inequalities at IBMQ. Int J Theor Phys 59, 3756–3768 (2020). https://doi.org/10.1007/s10773-020-04629-4

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  • DOI: https://doi.org/10.1007/s10773-020-04629-4

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