Experimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light
| Autor: | Masato Koashi, Rikizo Ikuta, Takashi Yamamoto, Shota Nozaki, Nobuyuki Imoto |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Physics
Quantum Physics Multidisciplinary Photon Science FOS: Physical sciences Quantum channel Quantum entanglement Polarization (waves) 01 natural sciences Article 010305 fluids & plasmas Photon entanglement Qubit Quantum mechanics Reciprocity (electromagnetism) 0103 physical sciences Medicine 010306 general physics Quantum Physics (quant-ph) Subspace topology |
| Zdroj: | Scientific Reports Scientific Reports, Vol 7, Iss 1, Pp 1-7 (2017) |
| Popis: | 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 |
| Databáze: | OpenAIRE |
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