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Author  |
Shor, Peter W. |
| Title |
Quantum information theory: The bits don't add up |
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Journal Article |
| Year |
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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RPLAB @ gujma @ |
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800 |
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| Author |
Shklovskij V.A. |
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Hot Electrons in Metals at Low Temperatures |
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Journal Article |
| Year |
1980 |
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J. Low Temp. Phys. |
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41 |
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375-396 |
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Hot electrons in metals at helium temperatures under steady conditions can be produced by passing an electric current of moderate density through thin, narrow (-1 μm wide) metallic films in good thermal contact with bulk single-crystal dielectric substrates. This paper is concerned with the theory of hot electrons in normal metals at low temperatures (when θ<< θ(D), where θ is the average electron energy and θ(D) is the Debye temperature). The theory is formulated in terms of realistic electron and phonon dispersion laws, taking into account the experimental possibility of heat removal from the sample. In the case in which the temperature approximation of Kagnov, Lifshitz, and Tanatarov is not satisfied when elastic scattering of electrons is dominant in a steady state electric field, the kinetic equation is derived for the energy-dependent, hot electron distribution function, which determines the associated nonlinear responses. The solution of this equation is discussed for a simple model. It is shown that the experimental information on the electron-phonon interaction in a metal can be obtained in terms of the well-known spectral functions. This is illustrated by experiments determining the nonlinear field dependence of the resistance, by tunnel experiments, and by critical current hysteresis measurements (for superconducting metals). Theoretical estimates which support the observability of the effects underdiscussion are presented. |
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RPLAB @ atomics90 @ |
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957 |
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Shitov, Sergey V.; Vystavkin, Alexander N. |
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A design analysis of imaging radiometer with antenna-coupled transition-edge sensors |
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2006 |
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Nuclear Instruments and Methods in Physics Research A |
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559 |
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503-505 |
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RPLAB @ s @ det_imag_radiometer_Shitov |
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402 |
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Shitov, S. V.; Inatani, J.; Shan, W.-L.; Takeda, M; Wang, Z.; Uvarov, A. V.; Ermakov, A. B.; Uzawa, Y. |
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Measurement of emissivity of the ALMA antenna panel at 840 GHz using NbN-based heterodyne SIS receiver |
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Conference Article |
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2008 |
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Proc. 19th Int. Symp. Space Terahertz Technol. |
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263-266 |
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SIS mixer, reflection, emissivity, mirror, space telescope, space observatory |
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580 |
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Shitov, S. V.; Levitchev, M.; Veretennikov, A. V.; Koshelets, V. P.; Prokopenko, G. V.; Filippenko, L. V.; Ermakov, A. B.; Shtanyuk, A. M.; Kohlstedt, H.; Ustinov, A. V. |
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Superconducting integrated receiver as 400-600 GHz tester for coolable devices |
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Journal Article |
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2001 |
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IEEE Trans. Appl. Supercond. |
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11 |
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1 |
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832-835 |
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RPLAB @ s @ sis_Shitov_2001 |
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313 |
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