Title :
Biphoton ququarts and their entanglement
Author_Institution :
Dept. of Phys., Pohang Univ. of Sci. & Technol. (POSTECH), Pohang
Abstract :
A four-dimensional quantum system (ququart) can be constructed by using the biphoton polarization states of frequency-nondegenerate spontaneous parametric down-conversion. We first discuss how to generate and characterize general single-ququart states with varying degrees of mixedness. We then discuss schemes to entangle multiple biphoton ququarts using linear optics and coincidence post-selection.
Keywords :
optical frequency conversion; quantum entanglement; quantum optics; coincidence post-selection; four-dimensional quantum system; frequency-nondegenerate spontaneous parametric down-conversion; linear optics; multiple biphoton ququarts; polarization states; quantum entanglement; single-ququart states; Character generation; Frequency; Hilbert space; Nonlinear optics; Optical control; Optical polarization; Optical switches; Physics; Quantum entanglement; Ultrafast optics;
Conference_Titel :
Lasers and Electro-Optics - Pacific Rim, 2007. CLEO/Pacific Rim 2007. Conference on
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-1173-3
Electronic_ISBN :
978-1-4244-1174-0
DOI :
10.1109/CLEOPR.2007.4391556
