Quantum annealing processors implement analog-digital quantum computing via effective XY-model evolution combined with auxiliary-qubit arbitrary-basis initialization and measurement, demonstrated through oscillations, fermionic quantum walks, and Anderson localization.
Benchmarking quantum simulation with neutron-scattering experiments
6 Pith papers cite this work. Polarity classification is still indexing.
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Pith papers citing it
abstract
Realistic simulation of quantum materials is a central goal of quantum computation. Although quantum processors have advanced rapidly in scale and fidelity, it has remained unclear whether pre-fault-tolerant devices can perform quantitatively reliable material simulations. We demonstrate that a superconducting quantum processor operating on up to 50 qubits can already produce meaningful, quantitative comparisons with inelastic neutron-scattering measurements of KCuF$_3$, a canonical realization of a gapless Luttinger liquid system with a strongly correlated ground state and a spectrum of emergent spinons. The quantum simulation is enabled by a quantum-classical workflow for computing dynamical structure factors (DSFs). The resulting spectra are benchmarked against experimental measurements using multiple metrics, highlighting the impact of circuit depth and circuit fidelity on simulation accuracy. Finally, we extend our simulations to a 1D XXZ Heisenberg model with next-nearest-neighbor (NNN) interactions and a strong anisotropy, producing a gapped excitation spectrum, which could be used to describe the CsCoX$_3$ compounds above the N\'eel temperature. Our results establish a framework for computing DSFs for quantum materials in classically challenging regimes of strong entanglement and long-range interactions, enabling quantum simulations that are directly testable against laboratory measurements.
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quant-ph 6years
2026 6roles
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A pumping approach for computing dynamical structure factors on quantum computers directly targets specific frequencies by time-evolving with an oscillating perturbation, demonstrated on 20-qubit trapped-ion hardware.
Develops a validation framework for quantum spin dynamics simulations anchored by neutron scattering and classical methods, using observable maps, uncertainty propagation, robustness tests, and actuator-aware feedback.
Spacetime states unify path integrals, pseudo-density matrices, Page-Wootters, and related formalisms by showing they arise as particular evaluations or quantum channels from the same object.
NISQ quantum-advantage demos keep falling to classical simulation because hardware-fidelity circuit regions coincide with classically compressible structure; exit requires fault tolerance.
NISQ quantum simulation of spin-wave spectra in 2D chromium tri-halide magnets achieves agreement with classical benchmarks at quasi-constant wall-time scaling.
citing papers explorer
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Analog-Digital Quantum Computing with Quantum Annealing Processors
Quantum annealing processors implement analog-digital quantum computing via effective XY-model evolution combined with auxiliary-qubit arbitrary-basis initialization and measurement, demonstrated through oscillations, fermionic quantum walks, and Anderson localization.
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Dynamical structure factor with a pumping approach on a trapped-ion quantum computer
A pumping approach for computing dynamical structure factors on quantum computers directly targets specific frequencies by time-evolving with an oscillating perturbation, demonstrated on 20-qubit trapped-ion hardware.
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A Validation Framework for Quantum Simulation of Spin Dynamics against Inelastic Neutron Scattering and Classical Simulation
Develops a validation framework for quantum spin dynamics simulations anchored by neutron scattering and classical methods, using observable maps, uncertainty propagation, robustness tests, and actuator-aware feedback.
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Unifying spacetime approaches to quantum mechanics
Spacetime states unify path integrals, pseudo-density matrices, Page-Wootters, and related formalisms by showing they arise as particular evaluations or quantum channels from the same object.
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The NISQ Trap: Eight Years of Demonstrations the Hardware Was Built to Lose
NISQ quantum-advantage demos keep falling to classical simulation because hardware-fidelity circuit regions coincide with classically compressible structure; exit requires fault tolerance.
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Quantum Simulation of Magnetic Materials: from Ab-Initio to NISQ
NISQ quantum simulation of spin-wave spectra in 2D chromium tri-halide magnets achieves agreement with classical benchmarks at quasi-constant wall-time scaling.