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  • Dimensional Quantum Memory Advantage in the Simulation of Stochastic Processes

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    Tischler165539-Published.pdf (1.228Mb)
    Author(s)
    Ghafari, Farzad
    Tischler, Nora
    Thompson, Jayne
    Gu, Mile
    Shalm, Lynden K
    Verma, Varun B
    Nam, Sae Woo
    Patel, Raj B
    Wiseman, Howard M
    Pryde, Geoff J
    Griffith University Author(s)
    Patel, Raj B.
    Wiseman, Howard M.
    Pryde, Geoff
    Tischler, Nora
    Ghafari Jouneghani, Farzad
    Year published
    2019
    Metadata
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    Abstract
    Stochastic processes underlie a vast range of natural and social phenomena. Some processes such as atomic decay feature intrinsic randomness, whereas other complex processes, e.g., traffic congestion, are effectively probabilistic because we cannot track all relevant variables. To simulate a stochastic system's future behavior, information about its past must be stored, and thus memory is a key resource. Quantum information processing promises a memory advantage for stochastic simulation. Here, we report the first experimental demonstration that a quantum stochastic simulator can encode the required information in fewer ...
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    Stochastic processes underlie a vast range of natural and social phenomena. Some processes such as atomic decay feature intrinsic randomness, whereas other complex processes, e.g., traffic congestion, are effectively probabilistic because we cannot track all relevant variables. To simulate a stochastic system's future behavior, information about its past must be stored, and thus memory is a key resource. Quantum information processing promises a memory advantage for stochastic simulation. Here, we report the first experimental demonstration that a quantum stochastic simulator can encode the required information in fewer dimensions than any classical simulator, thereby achieving a quantum advantage in minimal memory requirements using an individual simulator. This advantage is in contrast to recent proof-of-concept experiments, where the memory saving would only become accessible in the limit of a large number of parallel simulations. In those examples, the minimal memory registers of individual quantum simulators had the same dimensionality as their classical counterparts. Our photonic experiment thus establishes the potential of new, practical resource savings in the simulation of complex systems.
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    Journal Title
    Physical Review X
    Volume
    9
    Issue
    4
    DOI
    https://doi.org/10.1103/PhysRevX.9.041013
    Copyright Statement
    © The Author(s) 2019. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
    Subject
    Astronomical and Space Sciences
    Condensed Matter Physics
    Quantum Physics
    Science & Technology
    Physical Sciences
    Physics, Multidisciplinary
    COMPUTATIONAL MECHANICS
    Publication URI
    http://hdl.handle.net/10072/389477
    Collection
    • Journal articles

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