View in EDS

Scalable unitary computing using time-parallelized photonic lattices.

Saved in:
Bibliographic Details
Title: Scalable unitary computing using time-parallelized photonic lattices.
Authors: Park, Hyungchul, Chae, Beomjoon, Jang, Hyunsoo, Yu, Sunkyu, Piao, Xianji
Source: Nanophotonics (21928606); Dec2025, Vol. 14 Issue 27, p5527-5535, 9p
Subject Terms: PHOTONICS, SCALABILITY, OPTICAL lattices, QUANTUM computing, OPTICAL information processing, COMPUTER science, PARALLEL programming, UNITARY operators
Abstract: Exploiting alternative physical dimensions beyond the spatial domain has been intensively explored to improve the scalability in photonic computing. One approach leverages dynamical systems for time-domain computation, enabling universal and reconfigurable unitary operations. Although this method yields O(N) scaling in both device footprint and gate count, the required computation time increases by O(N2), which hinders practical implementation due to limitations in quality factors and modulation speeds of optical elements. Here, we propose time-parallelized photonic lattices that achieve O(N) time scalability while preserving the O(N) spatial scaling. We devise a pseudospinor buffer operation that temporally stores the optical information, thereby enabling parallel unitary computation. The proposed method not only mitigates the requirement for high-quality factors but also provides robustness against a broad range of defects, demonstrating the feasibility of time-domain photonic computation. [ABSTRACT FROM AUTHOR]
Copyright of Nanophotonics (21928606) is the property of De Gruyter and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Complementary Index
Description
Abstract:Exploiting alternative physical dimensions beyond the spatial domain has been intensively explored to improve the scalability in photonic computing. One approach leverages dynamical systems for time-domain computation, enabling universal and reconfigurable unitary operations. Although this method yields O(N) scaling in both device footprint and gate count, the required computation time increases by O(N<sup>2</sup>), which hinders practical implementation due to limitations in quality factors and modulation speeds of optical elements. Here, we propose time-parallelized photonic lattices that achieve O(N) time scalability while preserving the O(N) spatial scaling. We devise a pseudospinor buffer operation that temporally stores the optical information, thereby enabling parallel unitary computation. The proposed method not only mitigates the requirement for high-quality factors but also provides robustness against a broad range of defects, demonstrating the feasibility of time-domain photonic computation. [ABSTRACT FROM AUTHOR]
ISSN:21928606
DOI:10.1515/nanoph-2025-0498