Anisotropically and High Entanglement of Biphoton States Generated in Spontaneous Parametric Down-Conversion
Mikhail Vladimirovich Fedorov, Maxim A. Efremov, Pavel A. Volkov, Ekaterina Moreva, Stanislav S. Straupe, S. P. Kulik · Physical Review Letters · 2007
We show both theoretically and experimentally that biphoton wave packets generated via spontaneous parametric down-conversion can be strongly anisotropic and highly entangled. The conditions under which these effects exist are found and discussed.