首页    期刊浏览 2024年11月24日 星期日
登录注册

文章基本信息

  • 标题:Solving Quantum Ground-State Problems with Nuclear Magnetic Resonance
  • 本地全文:下载
  • 作者:Zhaokai Li ; Man-Hong Yung ; Hongwei Chen
  • 期刊名称:Scientific Reports
  • 电子版ISSN:2045-2322
  • 出版年度:2011
  • 卷号:1
  • DOI:10.1038/srep00088
  • 出版社:Springer Nature
  • 摘要:

    Quantum ground-state problems are computationally hard problems for general many-body Hamiltonians; there is no classical or quantum algorithm known to be able to solve them efficiently. Nevertheless, if a trial wavefunction approximating the ground state is available, as often happens for many problems in physics and chemistry, a quantum computer could employ this trial wavefunction to project the ground state by means of the phase estimation algorithm (PEA). We performed an experimental realization of this idea by implementing a variational-wavefunction approach to solve the ground-state problem of the Heisenberg spin model with an NMR quantum simulator. Our iterative phase estimation procedure yields a high accuracy for the eigenenergies (to the 10−5 decimal digit). The ground-state fidelity was distilled to be more than 80%, and the singlet-to-triplet switching near the critical field is reliably captured. This result shows that quantum simulators can better leverage classical trial wave functions than classical computers

    .

    © 2011 Macmillan Publishers Limited. All rights reserved

国家哲学社会科学文献中心版权所有