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Digital Quantum Simulation of the Schwinger Model and Symmetry Protection with Trapped Ions

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arxiv 2112.14262 v2 pith:UXMEBXN2 submitted 2021-12-28 quant-ph hep-lathep-phnucl-th

classification quant-phhep-lathep-phnucl-th
keywords errorsexperimentallatticemodeldigitaldynamicsgaugephysical
verification ladder T0 review T1 audit T2 compute T3 formal
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Tracking the dynamics of physical systems in real time is a prime application of digital quantum computers. Using a trapped-ion system with up to six qubits, we simulate the real-time dynamics of a lattice gauge theory in 1+1 dimensions, i.e., the lattice Schwinger model, and demonstrate non-perturbative effects such as pair creation for times much longer than previously accessible. We study the gate requirement of two formulations of the model using the Suzuki-Trotter product formula, as well as the trade-off between errors from the ordering of the Hamiltonian terms, the Trotter step size, and experimental imperfections. To mitigate experimental errors, a recent symmetry-protection protocol for suppressing coherent errors and a symmetry-inspired post-selection scheme are applied. This work demonstrates the integrated theoretical, algorithmic, and experimental approach that is essential for efficient simulation of lattice gauge theories and other complex physical systems.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Non-Abelian dynamics on a cube: improving quantum compilation through qudit-based simulations

    quant-ph 2025-06 conditional novelty 7.0 of 10

    A qudit-based circuit for SU(2) lattice gauge theory on a cube, with improved decompositions for uniformly-controlled rotations and new elementary-gate resource estimates.

  2. $p$-Form Gauge Dynamics and Digital Quantum Simulation -- Flux and Cosmological Constant Neutralization

    quant-ph 2026-07 conditional novelty 6.0 of 10

    Exact diagonalization of a Gauss-law-reduced Z2 two-form plaquette model finds cap flux discharge of 20–37% and a tension-to-density dynamical crossover near (m/ε_E)_c ≃ 1.89, with a digital circuit encoding.

  3. Quantum computation of hadron scattering in a lattice gauge theory

    quant-ph 2025-05 conditional novelty 6.0 of 10

    On a trapped-ion quantum computer, the authors prepared multiple meson wave packets and simulated their early-time collisions in a 1+1D Z2 lattice gauge theory.

  4. Critical behavior of the Schwinger model via gauge-invariant VUMPS

    hep-lat 2024-12 conditional novelty 6.0 of 10

    The gauge-invariant VUMPS algorithm determines the continuum critical mass of the Schwinger model as (m/g)c = 0.333556(5) and produces data collapse consistent with Ising critical exponents.

  5. Efficient Quantum Simulation of QCD Jets on the Light Front

    hep-ph 2024-11 conditional novelty 6.0 of 10

    A direct second-quantized qubit encoding of the light-front QCD Hamiltonian is used to classically emulate in-medium jet evolution with up to three-particle Fock states.

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