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Article overview
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Realizing large-size quantum spin chains on cloud quantum computers | | Hongye Yu
; Yusheng Zhao
; Tzu-Chieh Wei
; | | Date: |
20 Jul 2022 | | Abstract: | Quantum computers have the potential to efficiently simulate other quantum
systems, especially when their size is large and classical simulation is not
feasible. Despite the total qubit number reaching over one hundred in several
existing quantum devices, their applicability is still plagued by the prevalent
noise and errors. Here we report experiments on various IBM quantum computers
to simulate ground states of quantum spin chains with qubit numbers ranging
from 4 to 102. The estimated ground-state energies from these experiments
across different backends and with varying sizes of system reach the expected
values within a few error percentages. The enabling factors for accurate large
experiments include physics-motivated variational ans"atze and efficient and
scalable energy measurement and error mitigation, particularly using a
reference state in the zero-noise extrapolation. | | Source: | arXiv, 2207.09994 | | Services: | Forum | Review | PDF | Favorites | |
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