Experimental control of remote spatial indistinguishability of photons to realize entanglement and teleportation

• URL: http://arxiv.org/abs/2003.10659v1
• Date: Tue, 24 Mar 2020 04:55:58 GMT
• Title: Experimental control of remote spatial indistinguishability of photons to realize entanglement and teleportation
• Authors: Kai Sun, Yan Wang, Zheng-Hao Liu, Xiao-Ye Xu, Jin-Shi Xu, Chuan-Feng Li, Guang-Can Guo, Alessia Castellini, Farzam Nosrati, Giuseppe Compagno, Rosario Lo Franco
• Abstract summary: This experiment realizes a basic nonlocal entangling gate by the inherent nature of identical quantum subsystems. The amount of entanglement uniquely depends on the degree of remote spatial indistinguishability, quantified by an entropic measure $mathcalI$, which enables teleportation with fidelities above the classical threshold.
• Score: 10.36805343572281
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Remote spatial indistinguishability of identical subsystems as a direct controllable quantum resource at distant sites has not been yet experimentally proven. We design a setup capable to tune the spatial indistinguishability of two photons by independently adjusting their spatial distribution in two distant regions, which leads to polarization entanglement starting from uncorrelated photons. The amount of entanglement uniquely depends on the degree of remote spatial indistinguishability, quantified by an entropic measure $\mathcal{I}$, which enables teleportation with fidelities above the classical threshold. This experiment realizes a basic nonlocal entangling gate by the inherent nature of identical quantum subsystems.

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