2026/02/05 by Tejas Acharya, Anonymous, Loïc Lanco +4
Computer Science · Physics and Astronomy · #Adiabatic quantum computation #Benchmark (surveying) #Computation #Hamiltonian (control theory) #Interface (matter) #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum optics and atomic interactions
paper · pdf · doi:10.1103/x983-pznx
openalex publication_date 2026/07/20 · openalex created_date 2026/07/21 · openalex updated_date 2026/07/28
Light-matter interfaces are pivotal for quantum computation and communication. While typically analyzed using single-mode or open-quantum-system approximations, these models often neglect multi-mode field states and light-matter entanglement, hindering exact protocol modeling. Here, we solve the full Hamiltonian dynamics of a solid-state spin-photon interface for three key protocols: the generation of photon-number superpositions, a controlled photon-photon gate, and the production of photonic cluster states. By deriving exact fidelities, we identify fundamental performance limits. Our results reveal that while realistic imperfections severely limit photon-photon gates, they only slightly affect linear photonic clusters and are nearly harmless for photon-number state superpositions.