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Haviland, David |
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Title |
Superconducting circuits: Quantum phase slips |
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2010 |
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Nature Physics |
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Nat. Phys. |
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6 |
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565–566 |
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fromIPMRAS |
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Coulomb interactions can cause a rapid change in the phase of the wavefunction along a very narrow superconducting system. Such a phase slip at the quantum level is now measured in a chain of Josephson junctions. |
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RPLAB @ gujma @ |
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807 |
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Saffman, Mark |
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Title |
Quantum computing: A quantum telecom link |
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Journal Article |
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2010 |
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Nature Physics |
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Nat. Phys. |
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6 |
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11 |
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838-839 |
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fromIPMRAS |
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Converting data-carrying photons to telecommunication wavelengths enables distribution of quantum information over long distances. |
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RPLAB @ gujma @ |
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833 |
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Author |
Mineev, Vladimir P. |
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Title |
Superfluid helium: Order in disorder |
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Journal Article |
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2012 |
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Nature Physics |
Abbreviated Journal |
Nat. Phys. |
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8 |
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253–254 |
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fromIPMRAS |
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Confining liquid 3He in porous silica aerogel prepared with strong anisotropy stabilizes a state of axial superfluidity. |
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RPLAB @ gujma @ |
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810 |
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Berlín, Guido; Brassard, Gilles; Bussières, Félix; Godbout, Nicolas; Slater, Joshua A.; Tittel, Wolfgang |
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Experimental loss-tolerant quantum coin flipping |
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Journal Article |
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2011 |
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Nature Communications |
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Nat. Comm. |
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2 |
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561 |
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7 |
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Coin flipping is a cryptographic primitive in which two distrustful parties wish to generate a random bit to choose between two alternatives. This task is impossible to realize when it relies solely on the asynchronous exchange of classical bits: one dishonest player has complete control over the final outcome. It is only when coin flipping is supplemented with quantum communication that this problem can be alleviated, although partial bias remains. Unfortunately, practical systems are subject to loss of quantum data, which allows a cheater to force a bias that is complete or arbitrarily close to complete in all previous protocols and implementations. Here we report on the first experimental demonstration of a quantum coin-flipping protocol for which loss cannot be exploited to cheat better. By eliminating the problem of loss, which is unavoidable in any realistic setting, quantum coin flipping takes a significant step towards real-world applications of quantum communication. |
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RPLAB @ gujma @ |
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766 |
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Bozyigit, D.; Lang, C.; Steffen, L.; Fink, J. M.; Eichler, C.; Baur, M.; Bianchetti, R.; Leek, P. J.; Filipp, S.; da Silva, M. P.; Blais, A.; Wallraff, A. |
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Antibunching of microwave-frequency photons observed in correlation measurements using linear detectors |
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2011 |
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Nature Physics |
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Nat. Phys. |
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7 |
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2 |
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154-158 |
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At optical frequencies the radiation produced by a source, such as a laser, a black body or a single-photon emitter, is frequently characterized by analysing the temporal correlations of emitted photons using single-photon counters. At microwave frequencies, however, there are no efficient single-photon counters yet. Instead, well-developed linear amplifiers allow for efficient measurement of the amplitude of an electromagnetic field. Here, we demonstrate first- and second-order correlation function measurements of a pulsed microwave-frequency single-photon source integrated on the same chip with a 50/50 beam splitter followed by linear amplifiers and quadrature amplitude detectors. We clearly observe single-photon coherence in first-order and photon antibunching in second-order correlation function measurements of the propagating fields. |
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RPLAB @ gujma @ |
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835 |
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