2–8 Nov 2025
TIFR Mumbai
Asia/Kolkata timezone

Ground state energy of a two-dimensional pure Z2 lattice gauge theory via sample-based quantum Krylov diagonalization

7 Nov 2025, 14:50
20m
AG80

AG80

Speaker

Dr Lento Nagano (University of Tokyo (JP))

Description

We study the ground state energy of a two-dimensional pure $\mathbb{Z}_2$ lattice gauge theory (LGT) on a triangular lattice by applying the sample-based quantum Krylov diagonalization. Moreover, an error detection and mitigation method based on Gauss’s law constraints is incorporated. We demonstrate this method in the $\mathbb{Z}_2$ LGT using the IBM quantum hardware and classical tensor network simulation, and investigate the errors arising from the algorithm and hardware noise.

Parallel Session (for talks only) Quantum computing and quantum information

Author

Dr Lento Nagano (University of Tokyo (JP))

Co-authors

Antonio Mezzacapo (IBM) Koji Terashi (University of Tokyo (JP)) Mario Motta (IBM) Tomoya Hayata (Keio University) Dr Vincent Pascuzzi (IBM) Dr William Kirby (IBM) Dr Yukio Kawashima (IBM) Yutaro Iiyama (University of Tokyo (JP))

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