Quantum nondemolition measurements for quantum information
- 31 January 2006
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 73 (1), 012113
- https://doi.org/10.1103/physreva.73.012113
Abstract
We discuss the characterization and properties of quantum nondemolition (QND) measurements on qubit systems. We introduce figures of merit which can be applied to systems of any Hilbert space dimension, thus providing universal criteria for characterizing QND measurements. The controlled-NOT gate and an optical implementation are examined as examples of QND devices for qubits. We also consider the QND measurement of weak values.Keywords
This publication has 38 references indexed in Scilit:
- The uncertainty relation in which-way experiments: how to observe directly the momentum transfer using weak valuesJournal of Optics B: Quantum and Semiclassical Optics, 2004
- Measuring a Photonic Qubit without Destroying ItPhysical Review Letters, 2004
- Entanglement Purification for Quantum ComputationPhysical Review Letters, 2003
- Uncertainty characteristics of generalized quantum measurementsPhysical Review A, 2003
- Cherenkov radiation of superluminal particlesPhysical Review A, 2002
- Nondeterministic gates for photonic single-rail quantum logicPhysical Review A, 2002
- Squeezing more from a quantum nondemolition measurementPhysical Review A, 2001
- Information and noise in quantum measurementPhysical Review A, 2000
- Quantum Nondemolition Measurements using Cold Trapped AtomsPhysical Review Letters, 1997
- Using feedback to eliminate back-action in quantum measurementsPhysical Review A, 1995