Journal Article

PUBDB-2026-02204

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Scalable quantum algorithm for meson scattering in a lattice gauge theory

Chai, Y. (Corresponding author)Extern*DESY* ; Guo, Y.DESY* ; Kühn, S.DESY*

2026
APS College Park, MD

This record in other databases:  

Please use a persistent id in citations: doi:10.1103/f93h-rlzy  doi:10.3204/PUBDB-2026-02204

Report No.: arXiv:2505.21240

Abstract: Scattering processes are essential for understanding the structure of matter, yet their real-time dynamics remain challenging to simulate classically. Quantum computers offer a promising path toward efficient simulation of such physical systems. Here, we present a general and scalable framework for simulating meson scattering in lattice gauge theories on digital quantum hardware. Our approach addresses two key challenges: First, we introduce a symmetry-preserving quantum subspace expansion method for constructing high-fidelity meson creation operators across a wide range of coupling and momenta. Second, we design a quantum circuit for meson wave packet preparation using Givens rotations, improving accuracy while reducing circuit depth compared to existing approaches. We demonstrate the method in a (1+1)-dimensional Z2 gauge theory and explore meson scattering dynamics with tensor network simulations. We study both elastic and inelastic scattering and provide a comprehensive characterization of the scattering process in terms of energy transfer, entanglement entropy, and heavier particle production during the dynamics. Our work provides a scalable, nonvariational approach for simulating meson scattering on near-term quantum devices and offers a concrete strategy for probing nonperturbative dynamics in confining gauge theories.

---

Contributing Institute(s):

1. Centre f. Quantum Techno. a. Application (CQTA)
2. Externes Institut (Extern)
3. Bibliothek und Dokumentation (L)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2026

---

Database coverage:
; ; ; ; Article Processing Charges ; Clarivate Analytics Master Journal List ; DOAJ Seal ; Emerging Sources Citation Index ; Fees ; IF < 5 ; JCR ; SCOPUS ; Web of Science Core Collection

---

---

Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Chai, Y. (Corresponding author)DESY* ; Guo, Y.DESY* ; Kuehn, S.DESY*
Scalable Quantum Algorithm for Meson Scattering in a Lattice Gauge Theory
(2025)2025     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

---