Floating Block Method for Quantum Monte Carlo Simulations
Journal Article
·
· Physical Review Letters
- Forschungszentrum Jülich (Germany); Michigan State University, East Lansing, MI (United States); Michigan State University
- Michigan State University, East Lansing, MI (United States)
- Universität Bonn (Germany); Forschungszentrum Jülich (Germany); Tbilisi State University (Georgia)
Quantum Monte Carlo simulations are powerful and versatile tools for the quantum many-body problem. In addition to the usual calculations of energies and eigenstate observables, quantum Monte Carlo simulations can in principle be used to build fast and accurate many-body emulators using eigenvector continuation or design time-dependent Hamiltonians for adiabatic quantum computing. Furthermore, these new applications require something that is missing from the published literature, an efficient quantum Monte Carlo scheme for computing the inner product of ground state eigenvectors corresponding to different Hamiltonians. In this work, we introduce an algorithm called the floating block method, which solves the problem by performing Euclidean time evolution with two different Hamiltonians and interleaving the corresponding time blocks. We use the floating block method and nuclear lattice simulations to build eigenvector continuation emulators for energies of 4He, 8Be, 12C, and 16O nuclei over a range of local and nonlocal interaction couplings. From the emulator data, we identify the quantum phase transition line from a Bose gas of alpha particles to a nuclear liquid.
- Research Organization:
- Michigan State University, East Lansing, MI (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- SC0013365; SC0021152; SC0023658; SC0024586; SC0023175
- OSTI ID:
- 2246901
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 131; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fast emulation of quantum three-body scattering
Determinantal and worldline quantum Monte Carlo methods for many-body systems
Testing the robustness of the genetic algorithm on the floating building block representation
Journal Article
·
Tue Jun 28 00:00:00 EDT 2022
· Physical Review. C
·
OSTI ID:2318493
Determinantal and worldline quantum Monte Carlo methods for many-body systems
Journal Article
·
Tue Jun 15 00:00:00 EDT 1993
· Physical Review, B: Condensed Matter; (United States)
·
OSTI ID:6520172
Testing the robustness of the genetic algorithm on the floating building block representation
Conference
·
Mon Dec 30 23:00:00 EST 1996
·
OSTI ID:430744