Studying the phase diagram of the three-flavor Schwinger model in the presence of a chemical potential with measurement- and gate-based quantum computing

Schuster, Stephan, Kühn, Stefan, Funcke, Lena, Hartung, Tobias, Pleinert, Marc-Oliver, von Zanthier, Joachim and Jansen, Karl (2024) Studying the phase diagram of the three-flavor Schwinger model in the presence of a chemical potential with measurement- and gate-based quantum computing. Physical Review D, 109.

Abstract

We propose an ansatz quantum circuit for the variational quantum eigensolver (VQE), suitable for exploring the phase structure of the multi-flavor Schwinger model in the presence of a chemical potential. Our ansatz is capable of incorporating relevant model symmetries via constrains on the parameters, and can be implemented on circuit-based as well as measurement-based quantum devices. We show via classical simulation of the VQE that our ansatz is able to capture the phase structure of the model, and can approximate the ground state to a high level of accuracy. Moreover, we perform proof-of-principle simulations on superconducting, gate-based quantum hardware. Our results show that our approach is suitable for current gate-based quantum devices, and can be readily implemented on measurement-based quantum devices once available.

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Official URL:	https://journals.aps.org/prd/abstract/10.1103/Phys...
Item Type:	Article
Disciplines:	Computing, Maths, Engineering and Natural Sciences > Computing and Information Systems
Depositing User:	Tobias Hartung
Date Deposited:	14 Jun 2024 08:34
Last Modified:	21 Oct 2024 14:23
URI:	https://nul.repository.guildhe.ac.uk/id/eprint/2111

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• Studying the phase diagram of the three-flavor Schwinger model in the presence of a chemical potential with measurement- and gate-based quantum computing. (deposited 10 May 2024 18:30)
  • Studying the phase diagram of the three-flavor Schwinger model in the presence of a chemical potential with measurement- and gate-based quantum computing. (deposited 14 Jun 2024 08:34) [Currently Displayed]

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