Passively self-error-rejecting qubit transmission over a collective-noise channel

  • Authors:

  • Fu-Guo Deng;Xi-Han Li;Hong-Yu Zhou

  • Affiliations:

  • Department of Physics, Beijing Normal University, Beijing, China;Department of Physics, Chongqing University, Chongqing, China;College of Nuclear Science and Technology, Beijing Normal University, Beijing, China

  • Venue:
  • Quantum Information & Computation
  • Year:
  • 2011

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Abstract

We propose a passively self-error-rejecting single-qubit transmission scheme for an arbitrary polarization state of a single qubit over a collective-noise channel, without resorting to additional qubits and entanglement. By splitting a single qubit into some wavepackets with some Mach-Zehnder interferometers, we can obtain an uncorrupted state with a success probability approaching 100% via postselection in different time bins, independent of the parameters of collective noise. It is simpler and more flexible than the schemes utilizing decoherence-free subspace and those with additional qubits. One can directly apply this scheme to almost all quantum communication protocols based on single photons or entangled photon systems against a collective noise.