Remotely Preparing Many Qubits with a Single Photon

Quantum Physics [Submitted on 3 Apr 2026] Remotely Preparing Many Qubits with a Single Photon Tzula B. Propp, Benedikt Tissot, Anders S. Sørensen, Stephanie D. C. Wehner A single photon in a superposition of d modes naturally encode a d-dimensional quantum system, a so-called qudit. We show that such superpositions can be leveraged to achieve a quantum speed-up of remote remote state preparation (RSP): a primitive for several quantum network protocols. For a superposition over d\geq 2 modes, the photon state can encode up to {\rm Log}_2(d) qubits, which we exploit in a proposed reflection based RSP protocol with multiple variations. For single qubit RSP, we achieve a performance comparable to the best known existing schemes but with reduced requirements for phase stabilization. For many qubit RSP the achievable success rates remain high despite needing exponentially many temporal modes, since only one photon needs to be transmitted and detected to prepare multiple qubits. By simultaneously preparing many qubits at once, we bypass limited qubit lifetimes limited qubit lifetimes and improve fidelities beyond what is achievable with existing RSP protocols. Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2604.03495 [quant-ph]   (or arXiv:2604.03495v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2604.03495 Focus to learn more Submission history From: Tzula Propp [view email] [v1] Fri, 3 Apr 2026 22:41:20 UTC (159 KB) Access Paper: HTML (experimental) view license Ancillary files (details): reflection_remote_state_preparation.jl window_problem.jl window_problem_new.jl Current browse context: quant-ph < prev   |   next > new | recent | 2026-04 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?)