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Encoding two qubits into a single qutrit: An experiment

Encoding two qubits into a single qutrit: An experiment We present an optical scheme for the recently proposed protocol for encoding arbitrary non-entangled states of two qubits into a state of one qutrit. Our experimental realization uses spatial-mode encoding. Each qudit is thus represented by a single photon propagating in d different optical fibers. The compression of two qubits into one qutrit is realized by an unbalanced beam splitter and a subsequent measurement. After successful encoding of two qubits the receiver could error-free restore any of the two encoded qubit states but not both of them simultaneously. The principle of experiment is based on the interplay of the second-order and fourth-order interference. Further, we propose a possible way for the simultaneous decoding of both qubits but with fidelities less than one. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Physica Hungarica Series B, Quantum Electronics Springer Journals

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References (3)

Publisher
Springer Journals
Copyright
Copyright © 2006 by Akadémiai Kiadó
Subject
Physics; Nuclear Physics, Heavy Ions, Hadrons
ISSN
1589-9535
eISSN
1786-3767
DOI
10.1556/APH.26.2006.3-4.7
Publisher site
See Article on Publisher Site

Abstract

We present an optical scheme for the recently proposed protocol for encoding arbitrary non-entangled states of two qubits into a state of one qutrit. Our experimental realization uses spatial-mode encoding. Each qudit is thus represented by a single photon propagating in d different optical fibers. The compression of two qubits into one qutrit is realized by an unbalanced beam splitter and a subsequent measurement. After successful encoding of two qubits the receiver could error-free restore any of the two encoded qubit states but not both of them simultaneously. The principle of experiment is based on the interplay of the second-order and fourth-order interference. Further, we propose a possible way for the simultaneous decoding of both qubits but with fidelities less than one.

Journal

Acta Physica Hungarica Series B, Quantum ElectronicsSpringer Journals

Published: Aug 29, 2009

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