Journal Article

PUBDB-2026-00082

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Realizing string breaking dynamics in a $\mathbb{Z}_2$ lattice gauge theory on quantum hardware

Alexandrou, C. ; Athenodorou, A. ; Blekos, K. ; Polykratis, G. ; Kuehn, S. (Corresponding author)DESY*

2025
American Physical Society Ridge, NY

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Please use a persistent id in citations: doi:10.1103/r6sr-dv13  doi:10.3204/PUBDB-2026-00082

Report No.: arXiv:2504.13760

Abstract: We investigate static and dynamical aspects of string breaking in a $\mathbb{Z}_2$ lattice gauge theory coupled to Kogut-Susskind staggered fermions. Using tensor network simulations, we demonstrate that the static potential as well as the site-resolved configuration of the matter sites and gauge links allows us to identify the regimes in which string breaking occurs. Furthermore, we develop a variational quantum eigensolver that allows for reliably preparing the ground state of the theory in both the absence and presence of static charges and to capture the static aspects of the phenomenon. Carrying out state preparation on real quantum hardware for up to 19 qubits, we demonstrate its suitability for current quantum devices. In addition, we study the real-time dynamics of a flux tube between two static charges using both tensor networks and quantum hardware. Using a trotterization for the time-evolution operator, we are able to show that the breaking process starts with the creation of charges inside the string. These eventually redistribute toward the static charges and screen them, which leads to the breaking of the flux tube.

Note: cc-by, 17 pages, 19 figures

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Contributing Institute(s):

1. Centre f. Quantum Techno. a. Application (CQTA)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. AQTIVATE - Advanced computing, quantum algorithms, and data-driven approaches for science, technology and engineering (101072344) (101072344)
3. SimEA - Modeling and Simulation for Engineering Applications (810660) (810660)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

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Database coverage:
; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Alexandrou, C. ; Athenodorou, A. ; Blekos, K. ; Polykratis, G. ; Kuehn, S. (Corresponding author)DESY*
Realizing string breaking dynamics in a $\mathbb{Z}_2$ lattice gauge theory on quantum hardware
[10.3204/PUBDB-2025-01390]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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