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19 April 2024

» arxiv » 1409.4267

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Quantum teleportation on a photonic chip
Benjamin J. Metcalf ; Justin B. Spring ; Peter C. Humphreys ; Nicholas Thomas-peter ; Marco Barbieri ; W. Steven Kolthammer ; Xian-min Jin ; Nathan K. Langford ; Dmytro Kundys ; James C. Gates ; Brian J. Smith ; Peter G. R. Smith ; Ian A. Walmsley ;
Date:	15 Sep 2014
Abstract:	Quantum teleportation is a fundamental concept in quantum physics which now finds important applications at the heart of quantum technology including quantum relays, quantum repeaters and linear optics quantum computing (LOQC). Photonic implementations have largely focussed on achieving long distance teleportation due to its suitability for decoherence-free communication. Teleportation also plays a vital role in the scalability of photonic quantum computing, for which large linear optical networks will likely require an integrated architecture. Here we report the first demonstration of quantum teleportation in which all key parts - entanglement preparation, Bell-state analysis and quantum state tomography - are performed on a reconfigurable integrated photonic chip. We also show that a novel element-wise characterisation method is critical to mitigate component errors, a key technique which will become increasingly important as integrated circuits reach higher complexities necessary for quantum enhanced operation.
Source:	arXiv, 1409.4267
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