Suppression of polarization decoherence for traveling light pulses via bang-bang dynamical decoupling

Details Suppression of polarization decoherence for traveling light pulses via bang-bang dynamical decoupling Suppression of polarization decoherence for traveling light pulses via bang-bang dynamical decoupling

2011-01-19

arxiv.org/abs/1101.3739v2

Phys. Rev. A 83, 032320 (2011)

Physics

Quantum Physics

14 pages, 15 figures

Scientific paper

In the propagation of optical pulses through dispersive media, the frequency degree of freedom acts as an effective decohering environment on the polarization state of the pulse. Here we discuss the application of open-loop dynamical-decoupling techniques for suppressing such a polarization decoherence in one-way communication channels. We describe in detail the experimental proof of principle of the "bang-bang" protection technique recently applied to flying qubits in [Damodarakurup et al., Phys. Rev. Lett. 103, 040502]. Bang-bang operations are implemented through appropriately oriented waveplates and dynamical decoupling is shown to be potentially useful to contrast a generic decoherence acting on polarization qubits propagating in dispersive media like, e.g., optical fibers.

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