| Records |
| Author |
Korneeva, Yu. P.; Trifonov, A. V.; Vakhtomin, Yu. B.; Smirnov, K. V. |
| Title |
Design of resonator for superconducting single-photon detector |
Type |
Journal Article |
| Year |
2011 |
Publication |
Rus. J. Radio Electron. |
Abbreviated Journal |
Rus. J. Radio Electron. |
| Volume |
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Issue |
12 |
Pages |
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| Keywords |
SSPD optical resonator, SNSPD |
Abstract  |
A resonator for superconducting single-photon detector is designed. Near 60% coupling with a radiation propagating from a dielectric substrate of optical fiber is demonstrated to be achieved for typical values of the detector’s film sheet resistance. |
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Russian |
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6 pages |
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1827 |
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Fuchs, G. D.; Burkard, G.; Klimov, P. V.; Awschalom, D. D. |
| Title |
A quantum memory intrinsic to single nitrogen–vacancy centres in diamond |
Type |
Journal Article |
| Year |
2011 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
7 |
Issue |
10 |
Pages |
789-793 |
| Keywords |
fromIPMRAS |
| Abstract |
A quantum memory, composed of a long-lived qubit coupled to each processing qubit, is important to building a scalable platform for quantum information science. These two qubits should be connected by a fast and high-fidelity operation to store and retrieve coherent quantum states. Here, we demonstrate a room-temperature quantum memory based on the spin of the nitrogen nucleus intrinsic to each nitrogen–vacancy (NV) centre in diamond. We perform coherent storage of a single NV centre electronic spin in a single nitrogen nuclear spin using Landau–Zener transitions across a hyperfine-mediated avoided level crossing. By working outside the asymptotic regime, we demonstrate coherent state transfer in as little as 120 ns with total storage fidelity of 88±6%. This work demonstrates the use of a quantum memory that is compatible with scaling as the nitrogen nucleus is deterministically present in each NV centre defect. |
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RPLAB @ gujma @ |
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823 |
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Семенов, А. В.; Девятов, И. А.; Рябчун, С. А.; Масленников, С. Н.; Масленникова, А. С.; Ларионов, П. А.; Воронов, Б. М.; Чулкова, Г. М. |
| Title |
Поглощение терагерцового электромагнитного излучения в “грязной” сверхпроводниковой пленке при произвольном виде спектральных функций |
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Journal Article |
| Year |
2011 |
Publication |
Ж. Радиоэлектрон. |
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| Volume |
10 |
Issue |
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Pages |
7 |
| Keywords |
terahertz electromagnetic radiation; superconductors; detectors of terahertz range |
| Abstract |
A problem of absorption of high-frequency electromagnetic field in dirty superconductor is treated within Keldysh technic. Expression for the source term in the kinetic equation for quasiparticle distribution function is derived. The result is significant for deriving a consistent microscopic theory of superconducting detectors for terahertz frequency range, perspective detectors on kinetic inductance of current-biased superconducting strip and on Josephson inductance of tunnel.
В технике Келдыша рассмотрена задача о поглощении мощности высокочастотного электромагнитного поля в сверхпроводнике, удовлетворяющем условию грязного предела. Получено выражение для члена источника в кинетическом уравнении для функции распределения квазичастиц, справедливое при произвольном виде спектральных функций. Этот результат имеет значение для развития последовательной микроскопической теории сверхпроводниковых детекторов излучения терагерцового диапазона, в частности, перспективных детекторов на кинетической индуктивности смещённой током сверхпроводниковой полоски и джозефсоновской индуктивности туннельного контакта. |
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Duplicated as 1117 |
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RPLAB @ gujma @ |
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713 |
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Semenov, A. V.; Devyatov, I. A.; Ryabchun, S. A.; Maslennikov, S. N.; Maslennikova, A. S.; Larionov, P. A.; Voronov, B. M.; Chulkova, G. M. |
| Title |
Absorption of terahertz electromagnetic radiation in dirty superconducting film at arbitrary type of the spectral functions |
Type |
Journal Article |
| Year |
2011 |
Publication |
Rus. J. Radio Electron. |
Abbreviated Journal |
Rus. J. Radio Electron. |
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Issue |
10 |
Pages |
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| Keywords |
terahertz electromagnetic radiation; superconductors; detectors of terahertz range |
| Abstract |
A problem of absorption of high-frequency electromagnetic field in dirty superconductor is treated within Keldysh technic. Expression for the source term in the kinetic equation for quasiparticle distribution function is derived. The result is significant for deriving a consistent microscopic theory of superconducting detectors for terahertz frequency range, perspective detectors on kinetic inductance of current-biased superconducting strip and on Josephson inductance of tunnel. |
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7 pages |
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1117 |
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Paiella, Roberto |
| Title |
Terahertz quantum cascade lasers: Going ultrafast |
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Journal Article |
| Year |
2011 |
Publication |
Nature Photonics |
Abbreviated Journal |
Nat. Photon. |
| Volume |
5 |
Issue |
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Pages |
253–255 |
| Keywords |
fromIPMRAS |
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A new asynchronous coherent optical sampling method allows for the direct visualization of actively mode-locked quantum cascade laser pulses at terahertz wavelengths. |
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RPLAB @ gujma @ |
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774 |
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