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Title: Variational Neural-Network Ansatz for Continuum Quantum Field Theory

Journal Article · · Physical Review Letters
ORCiD logo [1];  [2]; ORCiD logo [3]
  1. Massachusetts Institute of Technology, Cambridge, MA (United States); The NSF AI Institute for Artificial Intelligence and Fundamental Interactions, Cambridge, MA (United States)
  2. IBM Quantum, Yorktown Heights, NY (United States); MIT-IBM Watson AI Lab, Cambridge, MA (United States)
  3. Massachusetts Institute of Technology, Cambridge, MA (United States); The NSF AI Institute for Artificial Intelligence and Fundamental Interactions, Cambridge, MA (United States); Harvard University, Cambridge, MA (United States)

Physicists dating back to Feynman have lamented the difficulties of applying the variational principle to quantum field theories. In nonrelativistic quantum field theories, the challenge is to parametrize and optimize over the infinitely many n-particle wave functions comprising the state’s Fock-space representation. Here we approach this problem by introducing neural-network quantum field states, a deep learning ansatz that enables application of the variational principle to nonrelativistic quantum field theories in the continuum. Our ansatz uses the Deep Sets neural network architecture to simultaneously parametrize all of the n-particle wave functions comprising a quantum field state. We employ our ansatz to approximate ground states of various field theories, including an inhomogeneous system and a system with long-range interactions, thus demonstrating a powerful new tool for probing quantum field theories.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); National Quantum Information Science (QIS) Research Centers (United States). Co-design Center for Quantum Advantage (C2QA)
Sponsoring Organization:
National Science Foundation Graduate Research Fellowship; USDOE Office of Science (SC)
Grant/Contract Number:
SC0012704
OSTI ID:
2425552
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 8 Vol. 131; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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