A quantum probability splitter and its application to qubit preparation

Authors:
Kyriakos N. Sgarbas
Affiliations:
Wire Communications Lab, Department of Electrical and Computer Engineering, University of Patras, Patras, Greece 26500
Venue:
Quantum Information Processing
Year:
2013

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Abstract

This paper presents a quantum probability splitter, i.e. a quantum circuit that modifies the probability amplitudes of a qubit so that the probability on the selected basis state is halved. It also presents a potential application of this circuit related to qubit preparation: it shows how a qubit is prepared to a superposition of any valid pair of basis states probabilities, by repeated application of the quantum probability splitter.