Publication Date:
2015-07-15
Description:
Linear optics underpins fundamental tests of quantum mechanics and quantum technologies. We demonstrate a single reprogrammable optical circuit that is sufficient to implement all possible linear optical protocols up to the size of that circuit. Our six-mode universal system consists of a cascade of 15 Mach-Zehnder interferometers with 30 thermo-optic phase shifters integrated into a single photonic chip that is electrically and optically interfaced for arbitrary setting of all phase shifters, input of up to six photons, and their measurement with a 12-single-photon detector system. We programmed this system to implement heralded quantum logic and entangling gates, boson sampling with verification tests, and six-dimensional complex Hadamards. We implemented 100 Haar random unitaries with an average fidelity of 0.999 +/- 0.001. Our system can be rapidly reprogrammed to implement these and any other linear optical protocol, pointing the way to applications across fundamental science and quantum technologies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carolan, Jacques -- Harrold, Christopher -- Sparrow, Chris -- Martin-Lopez, Enrique -- Russell, Nicholas J -- Silverstone, Joshua W -- Shadbolt, Peter J -- Matsuda, Nobuyuki -- Oguma, Manabu -- Itoh, Mikitaka -- Marshall, Graham D -- Thompson, Mark G -- Matthews, Jonathan C F -- Hashimoto, Toshikazu -- O'Brien, Jeremy L -- Laing, Anthony -- New York, N.Y. -- Science. 2015 Aug 14;349(6249):711-6. doi: 10.1126/science.aab3642. Epub 2015 Jul 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre for Quantum Photonics, H. H. Wills Physics Laboratory, and Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol BS8 1UB, UK. ; Centre for Quantum Photonics, H. H. Wills Physics Laboratory, and Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol BS8 1UB, UK. Department of Physics, Imperial College London, London SW7 2AZ, UK. ; Nokia Technologies, Broers Building, 21 J. J. Thomson Avenue, Cambridge CB3 0FA, UK. ; Department of Physics, Imperial College London, London SW7 2AZ, UK. ; NTT Basic Research Laboratories, Nippon Telegraph and Telephone (NTT) Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan. ; NTT Device Technology Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan. ; Centre for Quantum Photonics, H. H. Wills Physics Laboratory, and Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol BS8 1UB, UK. anthony.laing@bristol.ac.uk.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26160375" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
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Chemistry and Pharmacology
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Computer Science
,
Medicine
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Natural Sciences in General
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Physics
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