Engineering Papers⌕ Search
Home/Archive/DOE OSTI

DOE OSTI · 2587875

Surrogate-constructed scalable-circuits adaptive variational quantum eigensolver in the Schwinger model

Gustafson, Erik [Universities Space Research Association, Mountain View, CA (United States)] (ORCID:0000000172175692)·Sherbert, Kyle [Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States). Center for Quantum Information Science and Engineering] (ORCID:0000000252586539)·Florio, Adrien [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000272764515)·Shirali, Karunya [Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States). Center for Quantum Information Science and Engineering] (ORCID:0000000220062343)·Chen, Yanzhu [Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States). Center for Quantum Information Science and Engineering; Florida State Univ., Tallahassee, FL (United States)] (ORCID:0000000155899197)·Lamm, Henry [Superconducting and Quantum Materials System Center (SQMS), Batavia, IL (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)] (ORCID:0000000330330791)·Valgushev, Semeon [Iowa State Univ., Ames, IA (United States)] (ORCID:0000000243061423)·Weichselbaum, Andreas [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000258323908)·Economou, Sophia E. [Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States). Center for Quantum Information Science and Engineering]·Pisarski, Robert D. [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000278624759)·Tubman, Norm M. [NASA Ames Research Center, Moffett Field, CA (United States)]
View original source ↗Read source document ↗Export metadata ↓

Abstract

Inspired by recent advancements in simulating periodic systems on quantum computers, we develop an approach to further advance the simulation of these systems, named (SC) 2 -ADAPT-VQE. Our approach extends the scalable-circuits ADAPT-VQE framework, which builds an ansatz from a pool of coordinate-invariant operators defined for arbitrarily large, though not arbitrarily small, volumes. Our method uses a classically tractable “surrogate constructed” method to remove irrelevant operators from the pool, reducing the minimum size for which the scalable circuits are defined. Bringing together the scalable circuits and the surrogate constructed approaches forms the core of the (SC) 2 methodology. Our approach allows for a wider set of classical computations on small volumes, which can be used for a more robust extrapolation protocol. While developed in the context of lattice models, the surrogate construction portion is applicable to a wide variety of problems where information about the relative importance of operators in the pool is available. As an example, we use it to compute the properties of the Schwinger model—quantum electrodynamics for a single, massive fermion in 1 +1 dimensions—and show that our method can be used to accurately extrapolate to the continuum limit.

Explore related subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICSlattice field theoryquantum computationquantum electrodynamicsquantum simulation

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Gustafson, Erik [Universities Space Research Association, Mountain View, CA (United States)] (ORCID:0000000172175692), Sherbert, Kyle [Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States). Center for Quantum Information Science and Engineering] (ORCID:0000000252586539), Florio, Adrien [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000272764515), Shirali, Karunya [Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States). Center for Quantum Information Science and Engineering] (ORCID:0000000220062343), Chen, Yanzhu [Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States). Center for Quantum Information Science and Engineering; Florida State Univ., Tallahassee, FL (United States)] (ORCID:0000000155899197), Lamm, Henry [Superconducting and Quantum Materials System Center (SQMS), Batavia, IL (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)] (ORCID:0000000330330791), Valgushev, Semeon [Iowa State Univ., Ames, IA (United States)] (ORCID:0000000243061423), Weichselbaum, Andreas [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000258323908), Economou, Sophia E. [Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States). Center for Quantum Information Science and Engineering], Pisarski, Robert D. [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000278624759), Tubman, Norm M. [NASA Ames Research Center, Moffett Field, CA (United States)]. 2025-06-02. Surrogate-constructed scalable-circuits adaptive variational quantum eigensolver in the Schwinger model. https://doi.org/10.1103/physrevapplied.23.064002

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related reports

DOE OSTI2026

Design-informed neutronics assessment of long-lived fission product transmutation in a tokamak fusion reactor blanket

This study presents a neutronics-based assessment of the feasibility and viability of transmuting six major long-lived fission products (LLFPs) from light-water reactors, namely 99 Tc, 129 I, 79 Se, 93 Zr, 126 Sn, and 135 Cs, within the blanket region of a tokamak fusion reactor, using the MIT ARC design as a concrete fusion configuration. Monte Carlo neutronics simulations were performed to evaluate LLFP transmutation and to compare the results with a reference boiling water reactor (BWR). The results indicate that transmutation of all six LLFPs is neutronics-feasible in fusion reactors, with transmutation half-lives significantly shorter than their natural decay half-lives. For elemental targets, transmutation of 135 Cs, 126 Sn, and 93 Zr was found potentially viable, as the net mass transmuted exceeded that achievable in the reference BWR under identical target volume and irradiation time. When isotopically separated targets were considered, transmutation of 126 Sn and 93 Zr appeared potentially viable. A parametric study demonstrated that plasma geometry modifications can enhance local neutron flux, increasing the transmuted 93 Zr mass by approximately 33% and reducing the transmutation half-life from approximately 240 years to 180 years. Repositioning the target and adjusting material layer thickness reduced the transmutation half-life of 93 Zr to 67 years and increased the net mass transmuted by a factor of 50. Furthermore, these results demonstrate that fusion reactors can enable LLFP transmutation beyond the practical limits of thermal fission reactors and highlight the critical role of reactor and blanket design optimization. Engineering and fuel-cycle considerations required for deployment are beyond the scope of this neutronics-focused study.

73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗
DOE OSTI2026

A hybrid Monte Carlo-deterministic second moment method with efficient variance reduction

In this work, we present a hybrid method that combines Monte Carlo with deterministic finite element methods to solve a linear Boltzmann transport equation. Our hybrid method runs orders of magnitude faster than Monte Carlo, without sacrificing accuracy, for a proxy problem from radiative transfer that contains both optically-thick and optically-thin material. We believe that this is the first demonstration of a hybrid Second Moment Method in more than one spatial dimension, the first to consider more than one material, and the first to use variance reduction. Our variance reduction approach arises from an asymptotic analysis in which we show that the magnitude of the scattering source grows without bound. We transform the problem to compute the deviation of the radiation intensity from isotropy. The magnitude of the source in the transformed problem is bounded, and the quality of the hybrid method solution is dramatically improved by a substantial reduction in the variance.

73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗