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Takesue, Hiroki; Nam, Sae Woo; Zhang, Qiang; Hadfield, Robert H.; Honjo, Toshimori; Tamaki, Kiyoshi; Yamamoto, Yoshihisa |
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Quantum key distribution over a 40-dB channel loss using superconducting single-photon detectors |
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2007 |
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Nature Photonics |
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Nat. Photon. |
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1 |
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343-348 |
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quantum cryptography, SSPD, QKD, DSP |
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RPLAB @ akorneev @ |
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609 |
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Williams, Benjamin S. |
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Title |
Terahertz quantum-cascade lasers |
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2007 |
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Nature Photonics |
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1 |
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517-525 |
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QCL review |
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Six years after their birth, terahertz quantum-cascade lasers can now deliver milliwatts or more of continuous-wave coherent radiation throughout the terahertz range — the spectral regime between millimetre and infrared wavelengths, which has long resisted development. This paper reviews the state-of-the-art and future prospects for these lasers, including efforts to increase their operating temperatures, deliver higher output powers and emit longer wavelengths. |
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632 |
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Lu, Chao-Yang; Zhou, Xiao-Qi; Gühne, Otfried; Gao, Wei-Bo; Zhang, Jin; Yuan, Zhen-Sheng; Goebel, Alexander; Yang, Tao; Pan, Jian-Wei |
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Experimental entanglement of six photons in graph states |
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2007 |
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Nature Physics |
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Nat. Phys. |
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3 |
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2 |
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91-95 |
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fromIPMRAS |
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Graph states-multipartite entangled states that can be represented by mathematical graphs-are important resources for quantum computation, quantum error correction, studies of multiparticle entanglement and fundamental tests of non-locality and decoherence. Here, we demonstrate the experimental entanglement of six photons and engineering of multiqubit graph states. We have created two important examples of graph states, a six-photon Greenberger-Horne-Zeilinger state, the largest photonic Schrödinger cat so far, and a six-photon cluster state, a state-of-the-art `one-way quantum computer'. With small modifications, our method allows us, in principle, to create various further graph states, and therefore could open the way to experimental tests of, for example, quantum algorithms or loss- and fault-tolerant one-way quantum computation. |
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RPLAB @ gujma @ |
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796 |
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Ursin, R.; Tiefenbacher, F.; Schmitt-Manderbach, T.; Weier, H.; Scheidl, T.; Lindenthal, M.; Blauensteiner, B.; Jennewein, T.; Perdigues, J.; Trojek, P.; Ömer, B.; Fürst, M.; Meyenburg, M.; Rarity, J.; Sodnik, Z.; Barbieri, C.; Weinfurter, H.; Zeilinger, A. |
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Entanglement-based quantum communication over 144km |
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2007 |
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Nature Physics |
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Nat. Phys. |
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3 |
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7 |
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481-486 |
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Quantum entanglement is the main resource to endow the field of quantum information processing with powers that exceed those of classical communication and computation. In view of applications such as quantum cryptography or quantum teleportation, extension of quantum-entanglement-based protocols to global distances is of considerable practical interest. Here we experimentally demonstrate entanglement-based quantum key distribution over 144km. One photon is measured locally at the Canary Island of La Palma, whereas the other is sent over an optical free-space link to Tenerife, where the Optical Ground Station of the European Space Agency acts as the receiver. This exceeds previous free-space experiments by more than an order of magnitude in distance, and is an essential step towards future satellite-based quantum communication and experimental tests on quantum physics in space. |
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797 |
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Pruessner, Marcel W.; Stievater, Todd H.; Rabinovich, William S. |
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Integrated waveguide Fabry-Perot microcavities with silicon/air Bragg mirrors |
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2007 |
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Optics Letters |
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Opt. Lett. |
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32 |
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5 |
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533 |
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0146-9592 |
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