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Papers by Kent Bonsma-Fisher
New Journal of Physics, 2012
We experimentally demonstrate a single-qubit decohering quantum channel using linear optics. We i... more We experimentally demonstrate a single-qubit decohering quantum channel using linear optics. We implement the channel, whose special cases include both the amplitude-damping channel and the bit-flip channel, using a single, static optical setup. Following a recent theoretical result [M. Piani et al., Phys. Rev. A, 84, 032304 (2011)], we realize the channel in an optimal way, maximizing the probability of success, i.e., the probability for the photonic qubit to remain in its encoding. Using a two-photon entangled resource, we characterize the channel using ancilla-assisted process tomography and find average process fidelities of 0.9808 ± 0.0002 and 0.9762 ± 0.0002 for amplitudedamping and the bit-flip case, respectively. PACS numbers: 42.50.-p, 42.50.Ex, 03.67.-a, 03.65.Yz
New Journal of Physics, 2012
We experimentally demonstrate a single-qubit decohering quantum channel using linear optics. We i... more We experimentally demonstrate a single-qubit decohering quantum channel using linear optics. We implement the channel, whose special cases include both the amplitude-damping channel and the bit-flip channel, using a single, static optical setup. Following a recent theoretical result [M. Piani et al., Phys. Rev. A, 84, 032304 (2011)], we realize the channel in an optimal way, maximizing the probability of success, i.e., the probability for the photonic qubit to remain in its encoding. Using a two-photon entangled resource, we characterize the channel using ancilla-assisted process tomography and find average process fidelities of 0.9808 ± 0.0002 and 0.9762 ± 0.0002 for amplitudedamping and the bit-flip case, respectively. PACS numbers: 42.50.-p, 42.50.Ex, 03.67.-a, 03.65.Yz