Related papers: Realizing string breaking dynamics in a $Z_2$ lattice gauge theory on quantum hardware

Realizing string breaking dynamics in a $Z_2$ lattice gauge theory on quantum hardware

URL: http://arxiv.org/abs/2504.13760v1
Date: Fri, 18 Apr 2025 15:52:31 GMT
Title: Realizing string breaking dynamics in a $Z_2$ lattice gauge theory on quantum hardware
Authors: Constantia Alexandrou, Andreas Athenodorou, Kostas Blekos, Georgios Polykratis, Stefan Kühn,
Abstract summary: We investigate static and dynamical aspects of string breaking in a $Z$ lattice gauge theory coupled to Kogut-Susskind staggered fermions.<n>We develop a variational quantum eigensolver that allows for reliably preparing the ground state of the theory.<n>We study the real-time dynamics of a flux tube between two static charges using both Networks and quantum hardware.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: We investigate static and dynamical aspects of string breaking in a $Z_2$ 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 towards the static charges and screen them, which leads to the breaking of the flux tube.

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