Optimal linear optical implementation of a single-qubit damping channel
Abstract
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 \pm 0.0002 and 0.9762 \pm 0.0002 for amplitude-damping and the bit-flip case, respectively.
Cite
@article{arxiv.1109.2070,
title = {Optimal linear optical implementation of a single-qubit damping channel},
author = {Kent Fisher and Robert Prevedel and Rainer Kaltenbaek and Kevin J. Resch},
journal= {arXiv preprint arXiv:1109.2070},
year = {2012}
}
Comments
4 pages, 3 figures