APS Logo

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.

–

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