Controlling entanglement by phase engineering in giant-atom waveguide

Quantum Physics [Submitted on 25 Mar 2026] Controlling entanglement by phase engineering in giant-atom waveguide Peng-Fei Wang, Lei Huang, Miao-Miao Wei, Hong Yang, Dong Yan We investigate the entanglement dynamics of two giant atoms coupled to a common waveguide. By introducing additional phase modulation at each coupling point, every photon propagation path is jointly controlled by two distinct coupling phases, enabling precise and flexible manipulation of the entanglement evolution. This phase engineering induces destructive interference among different paths, leading to entanglement dynamics in nested giant atoms that become equivalent to those of small atoms, as well as dynamical equivalence between separated and braided configurations. Furthermore, the proposed scheme significantly enhances the robustness of entanglement against variations in the phase shift, offering a practical route to generate stable entanglement and enabling quantum devices with programmable propagation and controllable memory effects. Comments: 10 pages, 8 figures, Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2603.24121 [quant-ph]   (or arXiv:2603.24121v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2603.24121 Focus to learn more Submission history From: Dong Yan [view email] [v1] Wed, 25 Mar 2026 09:33:18 UTC (16,915 KB) Access Paper: HTML (experimental) view license Current browse context: quant-ph < prev   |   next > new | recent | 2026-03 References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar Export BibTeX Citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Demos Related Papers About arXivLabs Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)