We propose an alternative scheme for quantum repeater without phase stabilization and polarization calibration of photons transmitted over long-distance channel. We introduce time-bin photonic states and use a new two-photon interference configuration to robustly generate entanglement between distant atomic-ensemble-based memory qubits. Our scheme can be performed with current experimental setups through making some simple adjustments.
@article{arxiv.0903.1977,
title = {Robust quantum repeater with atomic ensembles against phase and polarization instability},
author = {Ming Gao and Lin-Mei Liang and Cheng-Zu Li and Xiang-Bin Wang},
journal= {arXiv preprint arXiv:0903.1977},
year = {2009}
}