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4th Year Project
Optimization in a Quantum Communications Protocol Using Feedback Based Error Correction
Last updated: February 6, 2007 @ 9:22pm
Quantum computers represent the next revolution in the computing industry. However, a key component in a quantum computer will be communication channels to ferry information back and forth between units inside the computer. Even simpler then a complete quantum computer, quantum cryptography also needs an effective communication channel in order to become a commercial reality. One effective communication scheme is to embed qubits into photons and send them along optical fibres. However, information stored in the polarization of photons sent over an optical fibre may become corrupted due to noise and imperfections inherent in the fibre.
The main motivation for our fourth year project is the robust quantum communication protocol using polarization-entangled photon pairs proposed by Boileau et. al. which is a protocol that allows the set up of a quantum communications channel. More specifically, Boileau et. al. suggest in their paper a way to enhance their protocol using active feedback. The protocol makes use of a tag operation in order to filter out qubits, sent as entangled photon pairs, which have been corrupted by the birefringence effects of the optical fibre they were sent through. Currently, without feedback the protocol filters out two thirds of the qubits sent. Our fourth year project attempts to use different types of feedback methods, both classical and quantum, in order to optimize their protocol and reduce the number of qubits lost. Each feedback method will be simulated in Matlab to determine the optimum feedback method.
Supervisor
Professor: Raymond Laflamme | info
Graduate Student: Jean Christian Boileau | info
Prof. Laflamme is the Director of the Institute for Quantum Computing (link) at the University of Waterloo, and Jean Christian Boileau is a Graduate Student at the IQC.
Project Files
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The original paper which is the starting point for our project.
Robust Quantum Communication Using a Polarization-Entangled Photon Pair
by J.C. Boileau et. al.
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Our first term general overview report.
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word
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Our first term detailed report.
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Our first term Matlab code the goes with the work from our first term detailed report.
matlab
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Our second term general overview report.
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word
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Our second term detailed report.
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Our Systems Design Engineering 4th Year Design Project Symposium Presentation.
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ppt
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Our final Matlab code is currently in the process of being cleaned up. It should be posted shortly.
matlab
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