Quantum Process Tomography of a Controlled-NOT Gate
Top Cited Papers
- 20 August 2004
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 93 (8) , 080502
- https://doi.org/10.1103/physrevlett.93.080502
Abstract
We demonstrate complete characterization of a two-qubit entangling process—a linear optics controlled-not gate operating with coincident detection—by quantum process tomography. We use a maximum-likelihood estimation to convert the experimental data into a physical process matrix. The process matrix allows an accurate prediction of the operation of the gate for arbitrary input states and a calculation of gate performance measures such as the average gate fidelity, average purity, and entangling capability of our gate, which are 0.90, 0.83, and 0.73, respectively.Keywords
All Related Versions
This publication has 27 references indexed in Scilit:
- Measuring a Photonic Qubit without Destroying ItPhysical Review Letters, 2004
- Detection of Entanglement with Polarized Photons: Experimental Realization of an Entanglement WitnessPhysical Review Letters, 2003
- Creation of maximally entangled photon-number states using optical fiber multiportsPhysical Review A, 2003
- Demonstration of an all-optical quantum controlled-NOT gateNature, 2003
- Diagnosis, Prescription, and Prognosis of a Bell-State Filter by Quantum Process TomographyPhysical Review Letters, 2003
- Quantum inference of states and processesPhysical Review A, 2003
- Exploring Hilbert space: Accurate characterization of quantum informationPhysical Review A, 2001
- Probabilistic quantum logic operations using polarizing beam splittersPhysical Review A, 2001
- Realization of quantum process tomography in NMRPhysical Review A, 2001
- Linear transformations which preserve trace and positive semidefiniteness of operatorsReports on Mathematical Physics, 1972