Efficient Variational Generation of Thermofield Double States on a Superconducting Quantum Processor: Experiment (Part 2)

ORAL

Abstract

Recent progress on Near Intermediate Small Quantum devices has allowed the field of quantum simulation to experimentally investigate many interesting systems such as spin lattices, Fermi-Hubbard models and electronic orbitals of molecules. Most of this work focuses on preparing low-energy eigenstates of a known target Hamiltonian. Here, we experimentally investigate finite-temperature effects on a transverse-field Ising chain using four qubits of a seven-transmon quantum processor. Specifically, we variationally approximate thermofield double (TFD) states through minimization of the constructed cost function described in Part 1. We extract various correlation functions over a range of simulated temperatures, showing good agreement to those of an exact TFD.

*This research is funded by an ERC Synergy Grant, Intel Corporation, and IARPA (U.S. Army
Research Office grant W911NF-16-1-0071).

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Presenters

  • Ramiro Sagastizabal

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

Authors

  • Ramiro Sagastizabal

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

  • Michiel Adriaan Rol

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

  • Berend Klaver

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

  • Miguel Moreira

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

  • Shavindra Premaratne

    • Intel Labs, Intel Corporation

  • Sonika Johri

    • Intel Labs, Intel Corporation
    • Intel Corp - Santa Clara

  • Xiang Chris Zou

    • Intel Labs, Intel Corporation

  • Carmina Almudever

    • Delft University of Technology
    • QuTech, Delft University of Technology

  • Anne Matsuura

    • Intel Corp - Santa Clara
    • Intel Labs, Intel Corporation

  • Leonardo DiCarlo

    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology, Delft, The Netherlands
    • Delft University of Technology
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology - Netherlands
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology