TY - JOUR T1 - Fault-tolerant Quantum Communication with Minimal Physical Requirements JF - Physical Review Letters Y1 - 2006 A1 - L. Childress A1 - J. M. Taylor A1 - A. S. Sorensen A1 - M. D. Lukin AB - We describe a novel protocol for a quantum repeater which enables long distance quantum communication through realistic, lossy photonic channels. Contrary to previous proposals, our protocol incorporates active purification of arbitrary errors at each step of the protocol using only two qubits at each repeater station. Because of these minimal physical requirements, the present protocol can be realized in simple physical systems such as solid-state single photon emitters. As an example, we show how nitrogen vacancy color centers in diamond can be used to implement the protocol, using the nuclear and electronic spin to form the two qubits. VL - 96 UR - http://arxiv.org/abs/quant-ph/0410123v3 CP - 7 J1 - Phys. Rev. Lett. U5 - 10.1103/PhysRevLett.96.070504 ER -