Quantum computation of magnon spectra

被引：45

作者：

Francis, Akhil ^{[1
]}

Freericks, J. K. ^{[2
]}

Kemper, A. F. ^{[1
]}

机构：

[1] North Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA

[2] Georgetown Univ, Dept Phys, 37th & O St NW, Washington, DC 20057 USA

来源：

PHYSICAL REVIEW B | 2020年 / 101卷 / 01期

关键词：

We demonstrate quantum computation of two-point correlation functions for a Heisenberg spin chain. Using the IBM Q 20-qubit quantum machines; we find that; for two sites; the correlation functions produce the exact results reliably. For four sites; results from the IBM Q 20-qubit Tokyo quantum computer are noisy due to read out errors and decoherence. Nevertheless; the correlation functions retain the correct spectral information. This is illustrated in the frequency domain by accurately extracting the magnon energies from peaks in the spectral function. © 2020 American Physical Society;

D O I：

10.1103/PhysRevB.101.014411

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We demonstrate quantum computation of two-point correlation functions for a Heisenberg spin chain. Using the IBM Q 20-qubit quantum machines, we find that, for two sites, the correlation functions produce the exact results reliably. For four sites, results from the IBM Q 20-qubit Tokyo quantum computer are noisy due to read out errors and decoherence. Nevertheless, the correlation functions retain the correct spectral information. This is illustrated in the frequency domain by accurately extracting the magnon energies from peaks in the spectral function.

引用

页数：7

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