arXiv:quant-ph/0602138 · Physical Review A

Polarization states of four-dimensional systems based on biphotons

Yu. I. Bogdanov, Ekaterina V. Moreva, Gleb Maslennikov, R. F. Galeev, Stanislav S. Straupe, S. P. Kulik

Published Jun 9, 2006• 54 citations

Abstract

We discuss the concept of polarization states of four-dimensional quantum systems based on the frequency nondegenerate biphoton field. Several quantum tomography protocols were developed and implemented for the measurement of an arbitrary state of ququart. A simple method that does not rely on the interferometric technique is used to generate and measure the sequence of states that can be used for quantum communication purposes.

DOI: 10.1103/physreva.73.063810

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