The creation of a wide range of quantum states with controllable degrees of entanglement and entropy using an optical two-qubit source was reported. The measures of entanglement and entropy determined from tomographically derived density matrices were used to characterize the quantum states. The quantum states were obtained via spontaneous downconversion where a pump photon passed through a nonlinear crystal was converted into a pair of lower-energy photons.
|Original language||English (US)|
|Number of pages||4|
|Journal||Physical Review A. Atomic, Molecular, and Optical Physics|
|State||Published - Jan 2002|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics