Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Efficient quantum circuits based on the quantum natural gradient

Journal Article · · Physical Review Research

Efficient preparation of arbitrary entangled quantum states is crucial for quantum computation. This is particularly important for noisy intermediate-scale quantum simulators relying on variational hybrid quantum-classical algorithms. To that end, we propose symmetry-conserving modified quantum approximate optimization algorithm (SCom-QAOA) circuits. The depths of these circuits depend not only on the desired fidelity to the target state but also on the amount of entanglement the state contains. The parameters of the SCom-QAOA circuits are optimized using the quantum natural gradient method based on the Fubini-Study metric. The SCom-QAOA circuit transforms an unentangled state into a ground state of a gapped one-dimensional Hamiltonian with a circuit depth that depends not on the system size but rather on the finite correlation length. In contrast, the circuit depth grows proportionally to the system size for preparing low-lying states of critical one-dimensional systems. Even in the latter case, SCom-QAOA circuits with depth less than the system size were sufficient to generate states with fidelity in excess of 99%, which is relevant for near-term applications. The proposed scheme enlarges the set of the initial states accessible for variational quantum algorithms and widens the scope of investigation of nonequilibrium phenomena in quantum simulators.

Published by the American Physical Society 2024

Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
2476072
Alternate ID(s):
OSTI ID: 2478771
Journal Information:
Physical Review Research, Journal Name: Physical Review Research Journal Issue: 4 Vol. 6; ISSN PPRHAI; ISSN 2643-1564
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (54)

Simulating physics with computers journal June 1982
Circuit complexity in quantum field theory journal October 2017
Complexity of mixed Gaussian states from Fisher information geometry journal December 2020
On the universality of the quantum approximate optimization algorithm journal August 2020
Mixer-phaser Ansätze for quantum optimization with hard constraints journal June 2022
Geometry and non-adiabatic response in quantum and classical systems journal June 2017
The Variational Quantum Eigensolver: A review of methods and best practices journal November 2022
Probing many-body dynamics on a 51-atom quantum simulator journal November 2017
Multimode quantum interference of photons in multiport integrated devices journal March 2011
Noise-induced barren plateaus in variational quantum algorithms journal November 2021
Ising meson spectroscopy on a noisy digital quantum simulator journal July 2024
Simulating quantum many-body dynamics on a current digital quantum computer journal November 2019
Alignment between initial state and mixer improves QAOA performance for constrained optimization journal November 2023
A divide-and-conquer algorithm for quantum state preparation journal March 2021
Confinement and entanglement dynamics on a digital quantum computer journal June 2021
Matrix product states, projected entangled pair states, and variational renormalization group methods for quantum spin systems journal March 2008
Evolution of entanglement entropy in one-dimensional systems journal April 2005
An area law for one-dimensional quantum systems journal August 2007
X Y mixers: Analytical and numerical results for the quantum alternating operator ansatz journal January 2020
Parameter concentrations in quantum approximate optimization journal July 2021
Quantum circuits with uniformly controlled one-qubit gates journal May 2005
Quantum circuits for strongly correlated quantum systems journal March 2009
Quantum-state preparation with universal gate decompositions journal March 2011
Classifying and measuring geometry of a quantum ground state manifold journal August 2013
Compression of correlation matrices and an efficient method for forming matrix product states of fermionic Gaussian states journal August 2015
Entropy Scaling and Simulability by Matrix Product States journal January 2008
Class of Quantum Many-Body States That Can Be Efficiently Simulated journal September 2008
Entanglement of Low-Energy Excitations in Conformal Field Theory journal May 2011
Lattice Supersymmetry and Order-Disorder Coexistence in the Tricritical Ising Model journal May 2018
Training Variational Quantum Algorithms Is NP-Hard journal September 2021
Preparation of Matrix Product States with Log-Depth Quantum Circuits journal January 2024
Simulation of Many-Body Fermi Systems on a Universal Quantum Computer journal September 1997
Information-Theoretic Differential Geometry of Quantum Phase Transitions journal September 2007
Avoiding local minima in variational quantum eigensolvers with the natural gradient optimizer journal November 2020
Preparation and verification of tensor network states journal May 2022
Finite-depth scaling of infinite quantum circuits for quantum critical points journal August 2022
Efficient Variational Quantum Simulator Incorporating Active Error Minimization journal June 2017
Low-Rank Quantum State Preparation journal January 2024
Witnessing eigenstates for quantum simulation of Hamiltonian spectra journal January 2018
Evidence of scaling advantage for the quantum approximate optimization algorithm on a classically intractable problem journal May 2024
Quantum Computation as Geometry journal February 2006
Parameter Transfer for Quantum Approximate Optimization of Weighted MaxCut journal April 2023
Natural Gradient Works Efficiently in Learning journal February 1998
QGOpt: Riemannian optimization for quantum technologies journal March 2021
Integrability and complexity in quantum spin chains journal February 2024
Efficient variational simulation of non-trivial quantum states journal January 2019
Entanglement spreading in non-equilibrium integrable systems journal December 2020
Efficient numerical simulations with Tensor Networks: Tensor Network Python (TeNPy) journal October 2018
Quantum Natural Gradient journal May 2020
Quantum Circuits for Sparse Isometries journal March 2021
Simultaneous Perturbation Stochastic Approximation of the Quantum Fisher Information journal October 2021
The Quantum Approximate Optimization Algorithm and the Sherrington-Kirkpatrick Model at Infinite Size journal July 2022
From the Quantum Approximate Optimization Algorithm to a Quantum Alternating Operator Ansatz journal February 2019
Constraint Preserving Mixers for the Quantum Approximate Optimization Algorithm journal June 2022

Similar Records

Feedback-based quantum algorithms for ground state preparation
Journal Article · Wed Sep 25 00:00:00 EDT 2024 · Physical Review Research · OSTI ID:2473490

Efficient state preparation for the Schwinger model with a theta term
Journal Article · Thu Apr 24 00:00:00 EDT 2025 · Physical Review. D. · OSTI ID:2562697

Related Subjects