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  <doc>
    <id>8950</id>
    <completedYear/>
    <publishedYear>2022</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
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    <pageLast/>
    <pageNumber/>
    <edition/>
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    <type>article</type>
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    <title language="eng">Low-Rank Tensor Decompositions of Quantum Circuits</title>
    <abstract language="eng">Quantum computing is arguably one of the most revolutionary and disruptive technologies of this century. Due to the ever-increasing number of potential applications as well as the continuing rise in complexity, the development, simulation, optimization, and physical realization of quantum circuits is of utmost importance for designing novel algorithms. We show&#13;
how matrix product states (MPSs) and matrix product operators (MPOs) can be used to express certain quantum states, quantum gates, and entire quantum circuits as low-rank tensors. This enables the analysis and simulation of complex quantum circuits on classical computers and to gain insight into the underlying structure of the system. We present different examples to demonstrate the advantages of MPO formulations and show that they are more efficient than conventional techniques if the bond dimensions of the wave function representation can be kept small throughout the simulation.</abstract>
    <parentTitle language="eng">Journal of Computational Physics</parentTitle>
    <identifier type="arxiv">2205.09882</identifier>
    <enrichment key="PeerReviewed">no</enrichment>
    <enrichment key="SubmissionStatus">under review</enrichment>
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    <author>Patrick Gelß</author>
    <submitter>Patrick Gelß</submitter>
    <author>Stefan Klus</author>
    <author>Sebastian Knebel</author>
    <author>Zarin Shakibaei</author>
    <author>Sebastian Pokutta</author>
    <collection role="projects" number="no-project">no-project</collection>
    <collection role="persons" number="pokutta">Pokutta, Sebastian</collection>
    <collection role="institutes" number="ais2t">AI in Society, Science, and Technology</collection>
    <collection role="persons" number="gelß">Gelß, Patrick</collection>
    <collection role="persons" number="knebel">Knebel, Sebastian</collection>
    <collection role="persons" number="shakibaei">Shakibaei, Zarin</collection>
  </doc>
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