Quantum-classical hybrid algorithm for the simulation of all-electron correlation
Abstract
While chemical systems containing hundreds to thousands of electrons remain beyond the reach of quantum devices, hybrid quantum-classical algorithms present a promising pathway toward a quantum advantage. Hybrid algorithms treat the exponentially scaling part of the calculation-the static correlation-on the quantum computer and the non-exponentially scaling part-the dynamic correlation-on the classical computer. While a variety of algorithms have been proposed, the dependence of many methods on the total wave function limits the development of easy-to-use classical post-processing implementations. Here, we present a novel combination of quantum and classical algorithms, which computes the all-electron energy of a strongly correlated molecular system on the classical computer from the 2-electron reduced density matrix (2-RDM) evaluated on the quantum device. Significantly, we circumvent the wave function in the all-electron calculations by using density matrix methods that only require input of the statically correlated 2-RDM. Although the algorithm is completely general, we test it with two classical density matrix methods, the anti-Hermitian contracted Schrödinger equation (ACSE) and multiconfiguration pair-density functional theories, using the recently developed quantum ACSE method for simulating the statically correlated 2-RDM. Furthermore, we obtain experimental accuracy for the relative energies of all three benzyne isomers and thereby demonstrate the ability of themore »
- Authors:
-
- Univ. of Chicago, IL (United States)
- Publication Date:
- Research Org.:
- Univ. of Chicago, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division; National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1871654
- Alternate Identifier(s):
- OSTI ID: 1837608
- Grant/Contract Number:
- SC0019215; SC002183
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Chemical Physics
- Additional Journal Information:
- Journal Volume: 155; Journal Issue: 24; Journal ID: ISSN 0021-9606
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Quantum computing; Schrodinger equations; Statistical analysis; Electronic correlation; Density matrix method; Quantum algorithms; Complete-active space self-consistent field; Isomerism; Correlation energy; Density functional theory
Citation Formats
Boyn, Jan-Niklas, Lykhin, Aleksandr O., Smart, Scott E., Gagliardi, Laura, and Mazziotti, David A. Quantum-classical hybrid algorithm for the simulation of all-electron correlation. United States: N. p., 2021.
Web. doi:10.1063/5.0074842.
Boyn, Jan-Niklas, Lykhin, Aleksandr O., Smart, Scott E., Gagliardi, Laura, & Mazziotti, David A. Quantum-classical hybrid algorithm for the simulation of all-electron correlation. United States. https://doi.org/10.1063/5.0074842
Boyn, Jan-Niklas, Lykhin, Aleksandr O., Smart, Scott E., Gagliardi, Laura, and Mazziotti, David A. Tue .
"Quantum-classical hybrid algorithm for the simulation of all-electron correlation". United States. https://doi.org/10.1063/5.0074842. https://www.osti.gov/servlets/purl/1871654.
@article{osti_1871654,
title = {Quantum-classical hybrid algorithm for the simulation of all-electron correlation},
author = {Boyn, Jan-Niklas and Lykhin, Aleksandr O. and Smart, Scott E. and Gagliardi, Laura and Mazziotti, David A.},
abstractNote = {While chemical systems containing hundreds to thousands of electrons remain beyond the reach of quantum devices, hybrid quantum-classical algorithms present a promising pathway toward a quantum advantage. Hybrid algorithms treat the exponentially scaling part of the calculation-the static correlation-on the quantum computer and the non-exponentially scaling part-the dynamic correlation-on the classical computer. While a variety of algorithms have been proposed, the dependence of many methods on the total wave function limits the development of easy-to-use classical post-processing implementations. Here, we present a novel combination of quantum and classical algorithms, which computes the all-electron energy of a strongly correlated molecular system on the classical computer from the 2-electron reduced density matrix (2-RDM) evaluated on the quantum device. Significantly, we circumvent the wave function in the all-electron calculations by using density matrix methods that only require input of the statically correlated 2-RDM. Although the algorithm is completely general, we test it with two classical density matrix methods, the anti-Hermitian contracted Schrödinger equation (ACSE) and multiconfiguration pair-density functional theories, using the recently developed quantum ACSE method for simulating the statically correlated 2-RDM. Furthermore, we obtain experimental accuracy for the relative energies of all three benzyne isomers and thereby demonstrate the ability of the developed algorithm to achieve chemically relevant and accurate results on noisy intermediate-scale quantum devices.},
doi = {10.1063/5.0074842},
journal = {Journal of Chemical Physics},
number = 24,
volume = 155,
place = {United States},
year = {Tue Dec 28 00:00:00 EST 2021},
month = {Tue Dec 28 00:00:00 EST 2021}
}
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