Universal Continuous-Variable State Orthogonalizer and Qubit Generator
Authors: Coelho A. S., Costanzo L. S., Zavatta A., Hugues C., Kim M. S., Bellini M.
Autors Affiliation: Istituto Nazionale di Ottica (INO-CNR), Largo E. Fermi 6, 50125 Florence, Italy;
LENS and Department of Physics, University of Firenze, 50019 Sesto Fiorentino, Florence, Italy;
QOLS, The Blackett Laboratory, Imperial College London, SW7 2AZ, United Kingdom
Abstract: We experimentally demonstrate a universal strategy for producing a quantum state that is orthogonal to an arbitrary, infinite-dimensional, pure input one, even if only a limited amount of information about the latter is available. Arbitrary coherent superpositions of the two mutually orthogonal states are then produced by a simple change in the experimental parameters. We use input coherent states of light to illustrate two variations of the method. However, we show that the scheme works equally well for arbitrary input fields and constitutes a universal procedure, which may thus prove a useful building block for quantum state engineering and quantum information processing with continuous-variable qubits.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 116 (11) Pages from: 110501-1 to: 110501-5
More Information: A. Z., L. S. C., and M. B. acknowledge the support of the EU under the ERA-NET CHIST-ERA project QSCALE, and of the MIUR under the Contract No. FIRB RBFR10M3SB. M. S. K. and C. H. acknowledge the financial support of the UK EPSRC Grant No. EP/K034480/1. A. S. C. acknowledges the support of the CNPq-Brazil.KeyWords: Quantum computers; Quantum optics, Amount of information; Building blockes; Coherent superpositions; Continuous variables; Experimental parameters; Infinite dimensional; Quantum-information processing; Quantum-state engineering, Quantum theoryDOI: 10.1103/PhysRevLett.116.110501Citations: 16data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2023-02-05References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here