On the Origin of Classicality: Quantum Darwinism in Superconducting Circuits

ORAL

Abstract

We outline a comprehensive exploration into the foundational ideas of Quantum Darwinism, including

the emergence of branching structures and classicality through informational theoretic quantities such as

mutual, quantum discord, and Holevo information. We detail experimental investigation of these ideas

using superconducting quantum circuits providing a robust verification of this theory. Additionally, we

propose a special class of observables that can be used as a separate quantifier for classicality by showing

a one-to-one correspondence with the classical plateau of the mutual information. This quantity, which

we provide both mathematical proof and experimental verification, proves a computationally and experi-

mentally inexpensive way to observe the emergence of classicality.

*1) R.M. acknowledges support from the TcSUH Welch Professorship Award; calculations used resources from the Research Computing Data Core at the University of Houston and through allocation PHY240046 from the Advanced Cyberinfrastructure Coordination Ecosystem: Services & Support (ACCESS) program, which is supported by U.S. National Science Foundation grants #2138259, #2138286, #2138307, #2137603, and #2138296.2) A.T. acknowledges support from the U.S. DOE under the LDRD program at Los Alamos (LA-UR-24-28443).

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Presenters

  • Kiera Salice

    • University of Houston

Authors

  • Kiera Salice

    • University of Houston

  • Zitian Zhu

    • Zhejiang Key Laboratory and Micro-nano Quantum Chips and Quantum Control, Zhejiang University

  • Zehang Bao

    • Zhejiang Key Laboratory and Micro-nano Quantum Chips and Quantum Control, Zhejiang University

  • Qiujiang Guo

    • Zhejiang University

  • Akram Touil

    • Los Alamos National Laboratory

  • Rubem Mondaini

    • University of Houston, Texas
    • University of Houston
    • University of Housto, Houston, Texas
    • Department of Physics, University of Houston, Houston, Texas 77004; Texas Center for Superconductivity, University of Houston, Houston, Texas 77204