2012/11/30 by Timothy M. Rambo, Timothy Rambo, Joseph B. Altepeter +4 · 56 citations
Computer Science · Mathematics · Physics and Astronomy · #Computer science #Mathematics #Operator (biology) #Permutation (music) #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum algorithm #Quantum circuit #Quantum computer #Quantum error correction #Quantum information #Quantum mechanics #Quantum network #quant-ph
paper · pdf · doi:10.1103/physreva.93.052321
published in Physical Review A 93(5) (American Physical Society)
openalex publication_date 2016/05/18 · arxiv created 2016/06/16 · arxiv updated 2016/06/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Recent theoretical investigations treat quantum computations as functions, quantum processes which operate on other quantum processes, rather than circuits. Much attention has been given to the N-switch function which takes N black-box quantum operators as input, coherently permutes their ordering, and applies the result to a target quantum state. This is something which cannot be equivalently done using a quantum circuit. Here, we propose an all-optical system design which implements coherent operator permutation for an arbitrary number of input operators.