Simulation and randomized measurement of topological phase on a trapped-ion quantum computer - INSPIRE

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Simulation and randomized measurement of topological phase on a trapped-ion quantum computer

Cheong Eung Ahn
(
- POSTECH
)
,
Gil Young Cho
(
- POSTECH and
- IBS, Gyeongsangbuk, CGP and
- APCTP, Pohang
)

Jul 7, 2022

9 pages

Published in:

J.Korean Phys.Soc. 81 (2022) 3, 258-266

Published: Jul 7, 2022

DOI:

10.1007/s40042-022-00536-5

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Abstract: (Springer)

Noisy intermediate scale quantum (NISQ) computers are a promising platform for studying many-body quantum states, such as interacting topological states. Here we prepare a one-dimensional bosonic symmetry-protected topological (SPT) phases using variational quantum eigensolver (VQE) algorithms, and demonstrate the randomized measurement of the corresponding many-body topological invariant, on a trapped-ion quantum computer. We show that the randomized measurement protocol is applicable in real machines, with the dominant error arising from the imperfect preparation of the quantum states.

Noisy intermediate scale quantum computer
Quantum simulation
Variational quantum eigensolver
Symmetry-protected topological order
phase: topological
interaction: topological
variational
many-body problem

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