Robust implementations of Quantum Repeaters

Details Robust implementations of Quantum Repeaters Robust implementations of Quantum Repeaters

2005-11-07

arxiv.org/abs/quant-ph/0511056v2

Phys. Rev. A 73, 012332 (2006)

Physics

Quantum Physics

15 pages, 14 figures, minor changes in the introduction and Sec. III D, typos corrected, accepted for publication in Phys. Rev

Scientific paper

10.1103/PhysRevA.73.012332

We show how to efficiently exploit decoherence free subspaces (DFSs), which are immune to collective noise, for realizing quantum repeaters with long lived quantum memories. Our setup consists of an assembly of simple modules and we show how to implement them in systems of cold, neutral atoms in arrays of dipole traps. We develop methods for realizing robust gate operations on qubits encoded in a DFS using collisional interactions between the atoms. We also give a detailed analysis of the performance and stability of all required gate operations and emphasize that all modules can be realized with current or near future experimental technology.

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