Quantum computation of magnon spectra
Abstract
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. Furthermore, this is illustrated in the frequency domain by accurately extracting the magnon energies from peaks in the spectral function.
- Authors:
-
- North Carolina State Univ., Raleigh, NC (United States)
- Georgetown Univ., Washington, DC (United States)
- Publication Date:
- Research Org.:
- North Carolina State Univ., Raleigh, NC (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1582306
- Grant/Contract Number:
- SC0019469
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 101; Journal Issue: 1; Related Information: https://osf.io/9gx7u; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Quantum Computing
Citation Formats
Francis, Akhil, Freericks, J. K., and Kemper, A. F. Quantum computation of magnon spectra. United States: N. p., 2020.
Web. doi:10.1103/PhysRevB.101.014411.
Francis, Akhil, Freericks, J. K., & Kemper, A. F. Quantum computation of magnon spectra. United States. https://doi.org/10.1103/PhysRevB.101.014411
Francis, Akhil, Freericks, J. K., and Kemper, A. F. Thu .
"Quantum computation of magnon spectra". United States. https://doi.org/10.1103/PhysRevB.101.014411. https://www.osti.gov/servlets/purl/1582306.
@article{osti_1582306,
title = {Quantum computation of magnon spectra},
author = {Francis, Akhil and Freericks, J. K. and Kemper, A. F.},
abstractNote = {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. Furthermore, this is illustrated in the frequency domain by accurately extracting the magnon energies from peaks in the spectral function.},
doi = {10.1103/PhysRevB.101.014411},
journal = {Physical Review B},
number = 1,
volume = 101,
place = {United States},
year = {2020},
month = {1}
}
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