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We generate and reconstruct two-photon, 100-ps-separated time-bin-entangled qutrit states. By pairwise mapping time bins onto orthogonal polarizations, we perform a tomography and demonstrate high fidelity to maximally entangled qutrit states.
We discuss O-band entangled photon pair sources and entangled photon switching technologies and their application to quantum communications and quantum information processing.
We present a dual-in, dual-out, all-optical, fiber-based entangled photon switch, capable of 10-GHz operation. It improves upon a slower, three-port design which exhibits low-loss, low signal-band noise, and does not disturb the transmitted photons' quantum state.
We construct an entangled photon polarimeter capable of displaying an evolving quantum state in real time. We use it to record a 3 frame-per-second live video of a two-photon state's transition from separability to entanglement.
We present a high-speed all-optical switch for use in quantum information processing. The demonstrated implementation is capable of operating on 1310-nm single photons. Its performance is characterized using polarization-entangled photon pairs.
We build and characterize a fiber-based source of 1310-nm polarization entanglement with the highest reported fidelity to a maximally entangled state, 99.6% ?? 0.15% as characterized via coincidence basis tomography.
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