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‘*This work was supported by NSF 9503476 (information technology and organizations) and NSF 9415573 (undergraduate research). Jeff Norman can be reached at Foley and Lardner, s. 3300 One IBM Plaza 330 North Wabash Avenue, Chicago, IL 606 Il. Mark Foltz can be reached at the MlT AI Laboratory, 545 Technology Square, Cambridge, MA 02139. ii. Argument games… (More)
Using a spontaneous parametric-downconversion source of photon pairs, we are working towards the creation of arbitrary 2-qubit quantum states with high fidelity. Currently, all physically allowable combinations of polarization entanglement and mixture can be produced, including maximally-entangled mixed states. The states are experimentally measured and… (More)
Photon pairs sources based on nonlinear optical techniques are essential components in modern quantum optical systems. We present here a naturally occurring biological source of photon pairs - Green Fluorescent Protein (GFP) - obtained by a non-degenerate four-wave mixing (FWM).