Eigenvector Continuation with Subspace Learning
Journal Article
·
· Physical Review Letters
- Michigan State Univ., East Lansing, MI (United States). Facility for Rare Isotope Beams. Dept. of Physics and Astronomy; North Carolina State Univ., Raleigh, NC (United States). Dept. of Physics; DOE/OSTI
- Michigan State Univ., East Lansing, MI (United States). Facility for Rare Isotope Beams. Dept. of Physics and Astronomy; North Carolina State Univ., Raleigh, NC (United States). Dept. of Physics
- North Carolina State Univ., Raleigh, NC (United States). Dept. of Mathematics
- Univ. of Pennsylvania, Philadelphia, PA (United States). School of Engineering and Applied Science
- Univ. of Guelph, ON (Canada). Dept. of Physics
A common challenge faced in quantum physics is finding the extremal eigenvalues and eigenvectors of a Hamiltonian matrix in a vector space so large that linear algebra operations on general vectors are not possible. There are numerous efficient methods developed for this task, but they generally fail when some control parameter in the Hamiltonian matrix exceeds some threshold value. In this Letter we present a new technique called eigenvector continuation that can extend the reach of these methods. The key insight is that while an eigenvector resides in a linear space with enormous dimensions, the eigenvector trajectory generated by smooth changes of the Hamiltonian matrix is well approximated by a very low-dimensional manifold. We prove this statement using analytic function theory and propose an algorithm to solve for the extremal eigenvectors. We benchmark the method using several examples from quantum many-body theory.
- Research Organization:
- North Carolina State Univ., Raleigh, NC (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- FG02-03ER41260
- OSTI ID:
- 1541342
- Alternate ID(s):
- OSTI ID: 1460593
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 3 Vol. 121; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Global Sensitivity Analysis of Bulk Properties of an Atomic Nucleus
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journal | December 2019 |
Zero-temperature limit and statistical quasiparticles in many-body perturbation theory
|
journal | June 2019 |
| Global sensitivity analysis of bulk properties of an atomic nucleus | text | January 2019 |
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