Cited by 224Quantum Computing Algorithms and ArchitectureQuantum many-body systemsAdvanced Chemical Physics Studies

VQE method: a short survey and recent developments

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Fedorov, Dmitry A., Peng, Bo, Govind, Niranjan, Alexeev, Yuri·2022·Materials Theory

Abstract

The variational quantum eigensolver (VQE) is a method that uses a hybrid quantum-classical computational approach to find eigenvalues of a Hamiltonian. VQE has been proposed as an alternative to fully quantum algorithms such as quantum phase estimation (QPE) because fully quantum algorithms require quantum hardware that will not be accessible in the near future. VQE has been successfully applied to solve the electronic Schrödinger equation for a variety of small molecules. However, the scalability of this method is limited by two factors: the complexity of the quantum circuits and the complexity of the classical optimization problem. Both of these factors are affected by the choice of the variational ansatz used to represent the trial wave function. Hence, the construction of an efficient ansatz is an active area of research. Put another way, modern quantum computers are not capable of executing deep quantum circuits produced by using currently available ansatzes for problems that map onto more than several qubits. In this review, we present recent developments in the field of designing efficient ansatzes that fall into two categories—chemistry–inspired and hardware–efficient—that produce quantum circuits that are easier to run on modern hardware. We discuss the shortfalls of ansatzes originally formulated for VQE simulations, how they are addressed in more sophisticated methods, and the potential ways for further improvements.

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Crossref · 10.1186/s41313-021-00032-6

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  • Quantum computers promise to efficiently solve important problems that are intractable on a conventional computer.

    “Quantum computers promise to efficiently solve important problems that are intractable on a conventional computer.”
  • Variational quantum eigensolvers (VQEs) are among the most promising quantum algorithms for quantum chemistry applications in the NISQ era.

    “Within the Noisy Intermediate-Scale Quantum (NISQ) era, Variational Quantum Eigensolvers (VQEs) [5] have emerged as one of the most promising algorithms for quantum chemistry applications. [6,7]”

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Authors
Fedorov, D. A., Peng, B., Govind, N., & Alexeev, Y.
Affiliations
  • Oak Ridge Associated Universities (US)
  • Pacific Northwest National Laboratory (US)
  • Argonne National Laboratory (US)
Corresponding author
  • Fedorov, Dmitry A.
  • Peng, Bo
  • Govind, Niranjan
  • Alexeev, Yuri
Venue
Materials Theory
Published
2022-01-06
Volume
6
Issue
1
ISSN
2509-8012 (ISSN-L)
OpenAlex
W4206745400
Cited by
224
References
101
Citations by year
2026: 28 · 2025: 64 · 2024: 52 · 2023: 53 · 2022: 24 · 2021: 3
FWCI
15.87
Type
journal article
Language
en
Open access
Locations
  • Materials Theory (publishedVersion, cc-by)
  • arXiv (Cornell University) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • arXiv (Cornell University)
Funders
Office of Science (DE-SC002024, DE-AC02-06CH11357)
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Computing Algorithms and Architecture
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum many-body systems
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Advanced Chemical Physics Studies
Keywords
variational quantum eigensolver, variational ansatz, hybrid quantum-classical algorithms, hardware-efficient ansatz, electronic Schrödinger equation, molecular quantum chemistry, variational quantum algorithms, quantum chemistry on quantum computers

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