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Shor, Peter W. |
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Quantum information theory: The bits don't add up |
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2009 |
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Nature Physics |
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Nat. Phys. |
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5 |
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247 - 248 |
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fromIPMRAS |
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A counterexample to the 'additivity question', the most celebrated open problem in the mathematical theory of quantum information, casts doubt on the possibility of finding a simple expression for the information capacity of a quantum channel. |
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800 |
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Author |
Esteban, Eduin; Serna, Hernandez |
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Title |
Quantum key distribution protocol with private-public key |
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Journal Article |
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2009 |
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arXiv |
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arXiv |
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3 |
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quantum cryptography; QKD; protocol |
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A quantum cryptographic protocol based in public key cryptography combinations and private key cryptography is presented. Unlike the BB84 protocol 1 and its many variants 2,3 two quantum channels are used. The present research does not make reconciliation mechanisms of information to derive the key. A three related system of key distribution are described. |
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arXiv: 0908.2146 |
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RPLAB @ gujma @ |
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756 |
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Trabesinger, Andreas |
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Title |
Quantum mechanics: Shaken foundations |
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Journal Article |
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2009 |
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Nature Physics |
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Nat. Phys. |
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5 |
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12 |
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863 |
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RPLAB @ gujma @ |
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802 |
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Polyakov, Sergey V.; Migdalla, Alan L. |
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Quantum radiometry |
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Journal Article |
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2009 |
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J. Modern Opt. |
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56 |
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9 |
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1045-1052 |
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We review radiometric techniques that take advantage of photon counting and stem from the quantum laws of nature. We present a brief history of metrological experiments and review the current state of experimental quantum radiometry. |
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RPLAB @ gujma @ |
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671 |
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Jackson, B. D.; Hesper, R.; Adema, J.; Barkhof, J.; Baryshev, A. M.; Zijlstra, T.; Zhu, S.; Klapwijk, T. M. |
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Series production of state-of-the-art 602-720 GHz SIS receivers for band 9 of ALMA |
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Conference Article |
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2009 |
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Proc. 20th Int. Symp. Space Terahertz Technol. |
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7-11 |
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SIS mixer, noise temperature, ALMA, band 9 |
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The Atacama Large Millimeter/Sub-millimeter Array (ALMA) requires the development and production of 73 state-of-the-art receivers for the 602-720 GHz range – the ALMA Band 9 cartridges. Development and pre-production of the first 8 cartridges was completed between 2003 and 2008, resulting in a cartridge design that meets the project's challenging requirements. The cartridge design remains essentially unchanged for production, while the production and test processes developed during pre-production have been fine-tuned to address the biggest new challenge for this phase – ramping up production to a rate of 2 cartridges per month over 2009-2012. |
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618 |
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