4.7 Article

Solving quasiparticle band spectra of real solids using neural-network quantum states

Journal

COMMUNICATIONS PHYSICS
Volume 4, Issue 1, Pages -

Publisher

NATURE RESEARCH
DOI: 10.1038/s42005-021-00609-0

Keywords

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Funding

  1. MEXT Quantum Leap Flagship Program (MEXT Q-LEAP) [JPMXS0118067394, JPMXS0120319794]
  2. Japan Science and Technology Agency (JST) (Q-LEAP program)
  3. Japan Society for the Promotion of Science (JSPS) KAKENHI [18K14181]
  4. JST PRESTO [JPMJPR191A]
  5. Army Research Office (ARO) [W911NF-18-1-0358]
  6. Japan Science and Technology Agency (JST) (CREST) [JPMJCR1676]
  7. Japan Society for the Promotion of Science (JSPS) (KAKENHI) [JP20H00134]
  8. Japan Society for the Promotion of Science (JSPS) (JSPS-RFBR) [JPJSBP120194828]
  9. Asian Office of Aerospace Research and Development (AOARD) [FA2386-20-1-4069]
  10. Foundational Questions Institute Fund (FQXi) [FQXi-IAF19-06]
  11. NTT Research
  12. Grants-in-Aid for Scientific Research [18K14181] Funding Source: KAKEN

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This study demonstrates the potential of artificial neural networks in predicting properties of solid systems, accurately simulating ground-state energies and quasiparticle band spectra, providing a new computational method for elucidating complex many-body phenomena in solid-state systems.
Establishing a predictive ab initio method for solid systems is one of the fundamental goals in condensed matter physics and computational materials science. The central challenge is how to encode a highly-complex quantum-many-body wave function compactly. Here, we demonstrate that artificial neural networks, known for their overwhelming expressibility in the context of machine learning, are excellent tool for first-principles calculations of extended periodic materials. We show that the ground-state energies in real solids in one-, two-, and three-dimensional systems are simulated precisely, reaching their chemical accuracy. The highlight of our work is that the quasiparticle band spectra, which are both essential and peculiar to solid-state systems, can be efficiently extracted with a computational technique designed to exploit the low-lying energy structure from neural networks. This work opens up a path to elucidate the intriguing and complex many-body phenomena in solid-state systems. Designing computational methods that can accurately predict useful material properties is an attractive alternative to cumbersome trial and error experimental approaches. Here, the authors present a computational method based on neural-network quantum states, which can reveal many-body quantum phenomena of a solid state system similar to first-principles calculations.

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