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Tomography of a displacement photon counter for discrimination of single-rail optical qubits
- Source :
- Izumi, S, Neergaard-Nielsen, J S & Andersen, U L 2018, ' Tomography of a displacement photon counter for discrimination of single-rail optical qubits ', Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 51, no. 8, 085502 . https://doi.org/10.1088/1361-6455/aab5dd
- Publication Year :
- 2017
- Publisher :
- arXiv, 2017.
-
Abstract
- We investigate the performance of a detection strategy composed of a displacement operation and a photon counter, which is known as a beneficial tool in optical coherent communications, to the quantum state discrimination of the two superpositions of vacuum and single photon states corresponding to the eigenstates in the single-rail encoding of photonic qubits. We experimentally characterize the detection strategy in vacuum-single photon two-dimensional space using quantum detector tomography and evaluate the achievable discrimination error probability from the reconstructed measurement operators. We furthermore derive the minimum error rate obtainable with Gaussian transformations and homodyne detection. Our proof-of-principle experiment shows that the proposed scheme can achieve a discrimination error surpassing homodyne detection.
- Subjects :
- Physics
Quantum Physics
Photon
business.industry
Gaussian
Word error rate
FOS: Physical sciences
Condensed Matter Physics
01 natural sciences
Atomic and Molecular Physics, and Optics
010309 optics
symbols.namesake
Optics
Homodyne detection
Quantum state
Qubit
0103 physical sciences
symbols
Photonics
010306 general physics
business
Quantum Physics (quant-ph)
Eigenvalues and eigenvectors
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Izumi, S, Neergaard-Nielsen, J S & Andersen, U L 2018, ' Tomography of a displacement photon counter for discrimination of single-rail optical qubits ', Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 51, no. 8, 085502 . https://doi.org/10.1088/1361-6455/aab5dd
- Accession number :
- edsair.doi.dedup.....d334a71ed88fb05dfbbfbaa7759618bb
- Full Text :
- https://doi.org/10.48550/arxiv.1711.07704