Simulating Meson Scattering on Spin Quantum Simulators
1Joint Center for Quantum Information and Computer Science, NIST/University of Maryland, College Park, MD 20742 USA
2Joint Quantum Institute, NIST/University of Maryland, College Park, MD 20742 USA
3Department of Theoretical Physics, University of Geneva, Quai Ernest-Ansermet 30, 1205 Geneva, Switzerland
4Rudolf Peierls Centre for Theoretical Physics, Clarendon Laboratory, Oxford OX1 3PU, United Kingdom
5Department of Physics and Institute for Quantum Information and Matter, California Institute of Technology, Pasadena, California 91125, USA
6Pritzker School of Molecular Engineering, The University of Chicago, Chicago, Illinois 60637, USA
7Duke Quantum Center, Department of Physics and Electrical and Computer Engineering, Duke University, Durham, NC 27701 USA
8School of Applied and Engineering Physics, Cornell University, Ithaca, NY 14853.
9Maryland Center for Fundamental Physics and Department of Physics, University of Maryland, College Park, MD 20742, USA
| Published: | 2025-06-17, volume 9, page 1773 |
| Editor: | Tommaso Macrì |
| Eprint: | arXiv:2403.07061v3 |
| Doi: | https://doi.org/10.22331/q-2025-06-17-1773 |
| Citation: | Quantum 9, 1773 (2025). |
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Abstract
Studying high-energy collisions of composite particles, such as hadrons and nuclei, is an outstanding goal for quantum simulators. However, preparation of hadronic wave packets has posed a significant challenge, due to the complexity of hadrons and the precise structure of wave packets. This has limited demonstrations of hadron scattering on quantum simulators to date. Observations of confinement and composite excitations in quantum spin systems have opened up the possibility to explore scattering dynamics in spin models. In this article, we develop two methods to create entangled spin states corresponding to wave packets of composite particles in analog quantum simulators of Ising spin Hamiltonians. One wave-packet preparation method uses the blockade effect enabled by beyond-nearest-neighbor Ising spin interactions. The other method utilizes a quantum-bus-mediated exchange, such as the native spin-phonon coupling in trapped-ion arrays. With a focus on trapped-ion simulators, we numerically benchmark both methods and show that high-fidelity wave packets can be achieved in near-term experiments. We numerically study scattering of wave packets for experimentally realizable parameters in the Ising model and find inelastic-scattering regimes, corresponding to particle production in the scattering event, with prominent and distinct experimental signals. Our proposal, therefore, demonstrates the potential of observing inelastic scattering in near-term quantum simulators.
Popular summary
In our work, we utilize these models of spin confinement to develop an experimental protocol for, and to analyze numerical simulations of, meson scattering. A significant challenge for the experimental demonstration of particle scattering is the preparation of meson wave packets. In this paper, we develop methods to create meson wave packets in analog quantum simulations using existing experimental capabilities. We then numerically study the elastic and inelastic scattering of these mesons in the confined and deconfined regimes of a quantum Ising model with variable interaction range. Notably, we demonstrate evidence for inelastic scattering with a non-negligible probability and prominent signature, making it a promising candidate for resolution in near-term quantum simulators.
Future experimental investigations of gauge theories and scattering on quantum simulators would signify an exciting development for the study of high-energy and nuclear physics using quantum technologies. Through both addressing experimental protocols for scattering and demonstrating a distinguishable inelastic scattering channel, our work outlines a concrete path towards the accomplishment of this goal and sets the stage for more complex scattering in the future.
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