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Author Perseguers, S.; Lewenstein, M.; Acín, A.; Cirac, J. I. openurl 
  Title Quantum random networks Type Journal Article
  Year 2010 Publication Nature Physics Abbreviated Journal Nat. Phys.  
  Volume 6 Issue 7 Pages 539-543  
  Keywords fromIPMRAS  
  Abstract Quantum mechanics offers new possibilities to process and transmit information. In recent years, algorithms and cryptographic protocols exploiting the superposition principle and the existence of entangled states have been designed. They should allow us to realize communication and computational tasks that outperform any classical strategy. Here we show that quantum mechanics also provides fresh perspectives in the field of random networks. Already the simplest model of a classical random graph changes markedly when extended to the quantum case, where we obtain a distinct behaviour of the critical probabilities at which different subgraphs appear. In particular, in a network of N nodes, any quantum subgraph can be generated by local operations and classical communication if the entanglement between pairs of nodes scales as N-2. This result also opens up new vistas in the domain of quantum networks and their applications.  
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  Call Number (up) RPLAB @ gujma @ Serial 804  
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Author Feofanov, A. K.; Oboznov, V. A.; Bol'Ginov, V. V.; Lisenfeld, J.; Poletto, S.; Ryazanov, V. V.; Rossolenko, A. N.; Khabipov, M.; Balashov, D.; Zorin, A. B.; Dmitriev, P. N.; Koshelets, V. P.; Ustinov, A. V. openurl 
  Title Implementation of superconductor/ferromagnet/ superconductor Type Journal Article
  Year 2010 Publication Nature Physics Abbreviated Journal Nat. Phys.  
  Volume 6 Issue 8 Pages 593-597  
  Keywords fromIPMRAS  
  Abstract High operation speed and low energy consumption may allow the superconducting digital single-flux-quantum circuits to outperform traditional complementary metal-oxide-semiconductor logic. The remaining major obstacle towards high element densities on-chip is a relatively large cell size necessary to hold a magnetic flux quantum Φ0. Inserting a Ï€-type Josephson junction in the cell is equivalent to applying flux Φ0/2 and thus makes it possible to solve this problem. Moreover, using Ï€-junctions in superconducting qubits may help to protect them from noise. Here we demonstrate the operation of three superconducting circuits-two of them are classical and one quantum-that all utilize such Ï€-phase shifters realized using superconductor/ferromagnet/superconductor sandwich technology. The classical circuits are based on single-flux-quantum cells, which are shown to be scalable and compatible with conventional niobium-based superconducting electronics. The quantum circuit is a Ï€-biased phase qubit, for which we observe coherent Rabi oscillations. We find no degradation of the measured coherence time compared to that of a reference qubit without a Ï€-junction.  
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  Call Number (up) RPLAB @ gujma @ Serial 805  
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Author Johnson, B. R.; Reed, M. D.; Houck, A. A.; Schuster, D. I.; Bishop, Lev S.; Ginossar, E.; Gambetta, J. M.; Dicarlo, L.; Frunzio, L.; Girvin, S. M.; Schoelkopf, R. J. openurl 
  Title Quantum non-demolition detection of single microwave photons in a circuit Type Journal Article
  Year 2010 Publication Nature Physics Abbreviated Journal Nat. Phys.  
  Volume 6 Issue 9 Pages 663-667  
  Keywords fromIPMRAS  
  Abstract Thorough control of quantum measurement is key to the development of quantum information technologies. Many measurements are destructive, removing more information from the system than they obtain. Quantum non-demolition (QND) measurements allow repeated measurements that give the same eigenvalue. They could be used for several quantum information processing tasks such as error correction, preparation by measurement and one-way quantum computing. Achieving QND measurements of photons is especially challenging because the detector must be completely transparent to the photons while still acquiring information about them. Recent progress in manipulating microwave photons in superconducting circuits has increased demand for a QND detector that operates in the gigahertz frequency range. Here we demonstrate a QND detection scheme that measures the number of photons inside a high-quality-factor microwave cavity on a chip. This scheme maps a photon number, n, onto a qubit state in a single-shot by means of qubit-photon logic gates. We verify the operation of the device for n=0 and 1 by analysing the average correlations of repeated measurements, and show that it is 90% QND. It differs from previously reported detectors because its sensitivity is strongly selective to chosen photon number states. This scheme could be used to monitor the state of a photon-based memory in a quantum computer.  
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  Notes Approved no  
  Call Number (up) RPLAB @ gujma @ Serial 806  
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Author Haviland, David openurl 
  Title Superconducting circuits: Quantum phase slips Type Journal Article
  Year 2010 Publication Nature Physics Abbreviated Journal Nat. Phys.  
  Volume 6 Issue Pages 565–566  
  Keywords fromIPMRAS  
  Abstract 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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  Notes Approved no  
  Call Number (up) RPLAB @ gujma @ Serial 807  
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Author Saunders, D. J.; Jones, S. J.; Wiseman, H. M.; Pryde, G. J. openurl 
  Title Experimental EPR-steering using Bell-local states Type Journal Article
  Year 2010 Publication Nat. Phys. Abbreviated Journal Nat. Phys.  
  Volume 6 Issue 11 Pages 845-849  
  Keywords fromIPMRAS  
  Abstract The concept of `steering' was introduced in 1935 by Schrödinger as a generalization of the EPR (Einstein-Podolsky-Rosen) paradox. It has recently been formalized as a quantum-information task with arbitrary bipartite states and measurements, for which the existence of entanglement is necessary but not sufficient. Previous experiments in this area have been restricted to an approach that followed the original EPR argument in considering only two different measurement settings per side. Here we demonstrate experimentally that EPR-steering occurs for mixed entangled states that are Bell local (that is, that cannot possibly demonstrate Bell non-locality). Unlike the case of Bell inequalities, increasing the number of measurement settings beyond two-we use up to six-significantly increases the robustness of the EPR-steering phenomenon to noise.  
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  Notes Approved no  
  Call Number (up) RPLAB @ gujma @ Serial 808  
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Author Toyabe, Shoichi; Sagawa, Takahiro; Ueda, Masahito; Muneyuki, Eiro; Sano, Masaki openurl 
  Title Experimental demonstration of information-to-energy conversion and validation of the generalized Jarzynski equality Type Journal Article
  Year 2010 Publication Nature Physics Abbreviated Journal Nat. Phys.  
  Volume 6 Issue 12 Pages 988-992  
  Keywords fromIPMRAS  
  Abstract In 1929, Leo Szilard invented a feedback protocol in which a hypothetical intelligence called Maxwell's demon pumps heat from an isothermal environment and transduces it to work. After an intense controversy that lasted over eighty years; it was finally clarified that the demon's role does not contradict the second law of thermodynamics, implying that we can convert information to free energy in principle. Nevertheless, experimental demonstration of this information-to-energy conversion has been elusive. Here, we demonstrate that a nonequilibrium feedback manipulation of a Brownian particle based on information about its location achieves a Szilard-type information-energy conversion. Under real-time feedback control, the particle climbs up a spiral-stairs-like potential exerted by an electric field and obtains free energy larger than the amount of work performed on it. This enables us to verify the generalized Jarzynski equality, or a new fundamental principle of “information-heat engine” which converts information to energy by feedback control.  
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  Notes Approved no  
  Call Number (up) RPLAB @ gujma @ Serial 831  
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Author Home, Jonathan openurl 
  Title Quantum entanglement: Watching correlations disappear Type Journal Article
  Year 2010 Publication Nature Physics Abbreviated Journal Nat. Phys.  
  Volume 6 Issue 12 Pages 938-939  
  Keywords fromIPMRAS  
  Abstract Engineered decoherence enables tracking of multipartite entanglement as a quantum state decays.  
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  Notes Approved no  
  Call Number (up) RPLAB @ gujma @ Serial 832  
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Author Saffman, Mark openurl 
  Title Quantum computing: A quantum telecom link Type Journal Article
  Year 2010 Publication Nature Physics Abbreviated Journal Nat. Phys.  
  Volume 6 Issue 11 Pages 838-839  
  Keywords fromIPMRAS  
  Abstract Converting data-carrying photons to telecommunication wavelengths enables distribution of quantum information over long distances.  
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  Notes Approved no  
  Call Number (up) RPLAB @ gujma @ Serial 833  
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Author Raussendorf, Robert openurl 
  Title Quantum computing: Shaking up ground states Type Journal Article
  Year 2010 Publication Nature Physics Abbreviated Journal Nat. Phys.  
  Volume 6 Issue 11 Pages 840-841  
  Keywords fromIPMRAS  
  Abstract Measurement-based quantum computation with an Affleck-Kennedy-Lieb-Tasaki state is experimentally realized for the first time.  
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  Notes Approved no  
  Call Number (up) RPLAB @ gujma @ Serial 834  
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Author Buchanan, Mark openurl 
  Title Body of evidence Type Manuscript
  Year 2010 Publication Nature Physics Abbreviated Journal Nat. Phys.  
  Volume 6 Issue Pages  
  Keywords fromIPMRAS  
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  Notes Approved no  
  Call Number (up) RPLAB @ gujma @ Serial 837  
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Author Goltsman, G. N.; Korneev, A. A.; Finkel, M. I.; Divochiy, A. V.; Florya, I. N.; Korneeva, Y. P.; Tarkhov, M. A.; Ryabchun, S. A.; Tretyakov, I. V.; Maslennikov, S. N.; Kaurova, N. S.; Chulkova, G. M.; Voronov, B. M. url  doi
openurl 
  Title Superconducting hot-electron bolometer as THz mixer, direct detector and IR single-photon counter Type Abstract
  Year 2010 Publication 35th Int. Conf. Infrared, Millimeter, and Terahertz Waves Abbreviated Journal  
  Volume Issue Pages 1-1  
  Keywords SSPD, SNSPD, HEB  
  Abstract We present a new generation of superconducting single-photon detectors (SSPDs) and hot-electron superconducting sensors with record characteristic for many terahertz and optical applications.  
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  ISSN 2162-2027 ISBN Medium  
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  Notes Approved no  
  Call Number (up) RPLAB @ sasha @ goltsman2010superconducting Serial 1028  
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Author Marsili, Francesco; Bitauld, David; Fiore, Andrea; Gaggero, Alessandro; Mattioli, Francesco; Leoni, Roberto; Divochiy, Aleksander; Gol'tsman, Gregory url  doi
openurl 
  Title Photon-number-resolution at telecom wavelength with superconducting nanowires Type Miscellaneous
  Year 2010 Publication IntechOpen Abbreviated Journal  
  Volume Issue Pages  
  Keywords SSPD, SNSPD  
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  Notes Approved no  
  Call Number (up) RPLAB @ sasha @ marsiliphoton Serial 1036  
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Author Smirnov, K. V.; Vakhtomin, Yu. B.; Divochiy, A. V.; Ozhegov, R. V.; Pentin, I. V.; Gol'tsman, G. N. url  doi
openurl 
  Title Infrared and terahertz detectors on basis of superconducting nanostructures Type Conference Article
  Year 2010 Publication Microwave and Telecom. Technol. (CriMiCo), 20th Int. Crimean Conf. Abbreviated Journal  
  Volume Issue Pages 823-824  
  Keywords SSPD, SNSPD, HEB  
  Abstract Results of development of single-photon receiving systems of visible, infrared and terahertz range based on thin-film superconducting nanostructures are presented. The receiving systems are produced on the basis of superconducting nanostructures, which function by means of hot-electron phenomena.  
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  Publisher Place of Publication Editor IEEE  
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  Call Number (up) RPLAB @ sasha @ smirnov2010infrared Serial 1025  
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Author Елезов, М. С.; Тархов, М. А.; Дивочий, А. В.; Вахтомин, Ю. Б.; Гольцман, Г. Н. url  isbn
openurl 
  Title Система регистрации одиночных фотонов в видимом и ближнем инфракрасном диапазонах Type Conference Article
  Year 2010 Publication Науч. сессия НИЯУ МИФИ Abbreviated Journal  
  Volume Issue Pages 94-95  
  Keywords SSPD  
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  Series Volume Series Issue Edition  
  ISSN ISBN 978-5-7262-1227-2 Medium  
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  Notes Approved no  
  Call Number (up) RPLAB @ sasha @ елезов2010система Serial 1032  
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Author Смирнов, Константин Владимирович; Вахтомин, Юрий Борисович; Смирнов, Андрей Владимирович; Ожегов, Роман Викторович; Пентин, Иван Викторович; Дивочий, Александр Валерьевич; Сливинская, Елизавета Вячеславовна; Гольцман, Григорий Наумович url  openurl
  Title Приемники терагерцового и инфракрасного диапазонов, основанные на тонкопленочных сверхпроводниковых наноструктурах Type Journal Article
  Year 2010 Publication Вестник НГУ. Серия: Физика Abbreviated Journal Вестник НГУ. Серия: Физика  
  Volume 5 Issue 4 Pages  
  Keywords HEB, SSPD, SNSPD  
  Abstract В работе представлены результаты разработки и создания чувствительных и ультрабыстрых приемников, основанных на тонкопленочных сверхпроводниковых наноструктурах: болометрах на эффекте электронного разогрева (HEB – hot-electron bolometer) и детекторах одиночных фотонов видимого и инфракрасного диапазонов волн (SSPD – superconducting singe-photon detector). Представлены основные принципы работы сверхпроводниковых устройств, технология создания и конструкционные особенности приемников, их основные типы и характеристики. Достигнутые рекордные значения параметров приемных систем позволяют использовать созданные приборы при решении различных научно-исследовательских задач в ближнем, среднем и дальнем ИК диапазонах волн.

This work presents the results of the development and fabrication of sensitive and ultrafast detectorsbased on thin film superconducting nanostructures: hot-electron bolometers (HEBs) and visible and infrared superconducting singe photon detectors (SSPDs). The main operational principles of the superconducting devices are presentedas well as the technology of fabrication of the detectors and their main types and parameters. The achieved record parameters of the detectors allow application of the fabricated devices to solution of various research problems in the near, middle and far IR ranges.		  
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  Publisher Новосибирский государственный университет Place of Publication Editor  
  Language Russian Summary Language Original Title  
  Series Editor Series Title Физика Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1818-7994 ISBN Medium  
  Area Expedition Conference  
  Notes УДК 538.9 Approved no  
  Call Number (up) RPLAB @ sasha @ смирнов2010приемники Serial 1033  
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