2003/11/25 by Marián Roško, Marian Rosko, Vladimír Bužek +3 · 1 citation
Computer Science · Physics and Astronomy · #Algorithm #Computer network #Computer science #Construct (python library) #Fidelity #Function (biology) #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum computer #Quantum information #Quantum mechanics #Quantum state #State (computer science) #Telecommunications #quant-ph
paper · pdf · doi:10.1103/physreva.68.062302
8 pages, 4 figures
arxiv created 2003/11/25 · openalex publication_date 2003/12/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We show that it is possible to control the trade-off between information gain and disturbance in generalized measurements of qudits by utilizing a programmable quantum processor. This universal quantum machine allows us to perform a generalized measurement on the initial state of the input qudit to construct a Husimi function of this state. The trade-off between the gain and the disturbance of the qudit is controlled by the initial state of ancillary system that acts as a program for the quantum-information distributor. The trade-off fidelity does not depend on the initial state of the qudit.