Journal Article

PUBDB-2025-00702

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Modified Conjugate Quantum Natural Gradient

Halla, M. (Corresponding author)DESY*

2025
SpringerOpen

This record in other databases:      

Please use a persistent id in citations: doi:10.1140/epjqt/s40507-025-00432-4  doi:10.3204/PUBDB-2025-00702

Abstract: The efficient optimization of variational quantum algorithms (VQAs) is critical for their successful application in quantum computing. The Quantum Natural Gradient (QNG) method, which leverages the geometry of quantum state space, has demonstrated improved convergence compared to standard gradient descent [Quantum 4, 269 (2020)]. In this work, we introduce the Modified Conjugate Quantum Natural Gradient (CQNG), an optimization algorithm that integrates QNG with principles from the nonlinear conjugate gradient method. Unlike QNG, which employs a fixed learning rate, CQNG dynamically adjusts hyperparameters at each step, enhancing both efficiency and flexibility. Numerical simulations show that CQNG achieves faster convergence than QNG across various optimization scenarios, even when strict conjugacy conditions are not always satisfied -- hence the term ``Modified Conjugate.'' These results highlight CQNG as a promising optimization technique for improving the performance of VQAs.

Note: There is no ‘Beamline/Experiment/Facility’ field for this work. I can't complete the submission without selecting this option, but it appears to be an error on the website.

---

Contributing Institute(s):

1. Centre f. Quantum Techno. a. Application (CQTA)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

---

Database coverage:
; ; ; ; Article Processing Charges ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Essential Science Indicators ; Fees ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---

---

Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Halla, M. (Corresponding author)DESY*
Modified conjugate quantum natural gradient
    Files  Fulltext Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

---