Variational preparation of finite-temperature states on a quantum computer (Part 2: experiment)

ORAL

Abstract

The preparation of thermal equilibrium states is important for the simulation of condensed-matter and cosmology systems using a quantum computer. Our method targets the generation of thermofield double states using a hybrid quantum-classical variational approach motivated by quantum-approximate optimization algorithms, without prior calculation of optimal variational parameters by numerical simulation. The fidelity of generated states to the thermal-equilibrium state varies smoothly from 99% at infinite temperature to 75% at near-zero temperature. We find quantitative agreement with a numerical simulation of our quantum processor with error parameters drawn from experiment.

*Research funded by Intel Corporation, ERC Synergy Grant QC-laband IARPA (U.S. Army Research Office grant W911NF-16-1-0071).

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Presenters

  • Ramiro Sagastizabal

    • Delft University of Technology
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology
    • QuTech

Authors

  • Ramiro Sagastizabal

    • Delft University of Technology
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology
    • QuTech

  • Shavindra Premaratne

    • Intel Labs, Intel Corporation
    • Intel Labs

  • Berend Klaver

    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology
    • QuTech

  • Michiel Adriaan Rol

    • Orange Quantum Systems
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology
    • QuTech

  • Victor Negîrneac

    • Qblox BV
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology
    • QuTech

  • Miguel S Moreira

    • Delft University of Technology
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology
    • QuTech

  • Xiang Zou

    • Intel Labs, Intel Corporation
    • Intel Labs

  • Sonika Johri

    • Intel Corporation - Hillsboro
    • IonQ, Inc.
    • IonQ Inc.
    • IonQ
    • Intel Labs

  • Nandini Muthusubramanian

    • QuTech, Delft University of Technology
    • Delft University of Technology
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology
    • QuTech

  • Marc Beekman

    • Netherlands Organization for Scientific Research (TNO)
    • Netherlands Organisation for Applied Scientific Research (TNO)

  • Chris Zachariadis

    • QuTech, Delft University of Technology
    • Delft University of Technology
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology
    • QuTech

  • Viacheslav Ostroukh

    • Kavli Institute of Nanoscience, Delft University of Technology
    • Kavli Institute of Nanoscience

  • Nadia Haider

    • Delft University of Technology
    • Netherlands Organization for Scientific Research (TNO)
    • Netherlands Organisation for Applied Scientific Research (TNO)

  • Alessandro Bruno

    • QuTech, Delft University of Technology
    • Delft University of Technology
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology
    • QuTech

  • Anne Matsuura

    • Intel Corporation - Hillsboro
    • Intel Labs, Intel Corporation
    • Intel Labs

  • Leonardo DiCarlo

    • QuTech, Delft University of Technology
    • Delft University of Technology
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology
    • QuTech