Experimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light
arXiv:1607.07314 · doi:10.1038/s41598-017-05008-6
Abstract
We experimentally demonstrate a proposal [Phys. Rev. A 87, 052325 (2013)] of a scheme for robust distribution of polarization entangled photon pairs over collective noisy channels having the reciprocity. Although the scheme employs the robustness of two qubit decoherence-free subspace, by utilizing the forward propagation of one half of the entangled photons and the backward propagation of a classical reference light, it achieves an entanglement-sharing rate proportional to the transmittance of the quantum channel for the signal photon. We experimentally observed the efficient sharing rate while keeping a highly entangled state after the transmission. We also show that the protection method is applicable to transmission of arbitrary polarization state of a single photon.
5 pages, 6 figures
References in corpus (8)
- Secure Quantum Key Distribution
- Diluted maximum-likelihood algorithm for quantum tomography
- Experimental Quantum Communication without a Shared Reference Frame
- Robust photonic entanglement distribution via state-independent encoding onto decoherence-free subspace
- Blind quantum computation over a collective-noise channel
- Experimental Demonstration of Decoherence-Free One-Way Information Transfer
- Efficient decoherence-free entanglement distribution over lossy quantum channels
- Experimental ancilla-assisted qubit transmission against correlated noise using quantum parity checking