TY  - JOUR
AU  - Schuster, Stephan
AU  - Kühn, Stefan
AU  - Funcke, Lena
AU  - Hartung, Tobias
AU  - Pleinert, Marc-Oliver
AU  - von Zanthier, Joachim
AU  - Jansen, Karl
TI  - Studying the phase diagram of the three-flavor Schwinger model in the presence of a chemical potential with measurement- and gate-based quantum computing
JO  - Physical review / D
VL  - 109
IS  - 11
SN  - 2470-0010
CY  - Ridge, NY
PB  - American Physical Society
M1  - PUBDB-2024-07155
M1  - arXiv:2311.14825
SP  - 114508
PY  - 2024
AB  - We propose an ansatz quantum circuit for the variational quantum eigensolver (VQE), suitable for exploring the phase structure of the multiflavor 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001252623400003
DO  - DOI:10.1103/PhysRevD.109.114508
UR  - https://bib-pubdb1.desy.de/record/618794
ER  -