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AIZENBERG, L. A.
CALCULATION EXPERIMENT ON THE HIGH-RESOLUTION OF PHYSICAL DEVICES BY THE EXTRAPOLATION OF THE FOURIER SPECTRUM OF UNIDIMENSIONAL FINITE SIGNALS / L. A. AIZENBERG, B. A. KRAVTSOV // Pisma Zhurnal Tek. Fiz. - 1987. - Vol. 13, Is. 19. - P. 1193-1197. - Cited References: 6 . - ISSN 0320-0116

РУБ Physics, Applied

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Доп.точки доступа:
KRAVTSOV, B. A.
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    Bulgakov, E. N.
    Q-factor optimization in dielectric oligomers / E. N. Bulgakov, D. N. Maksimov // Phys. Rev. A. - 2019. - Vol. 100, Is. 3. - Ст. 033830, DOI 10.1103/PhysRevA.100.033830. - Cited References: 43. - This work was supported by the Ministry of Higher Education and Science of the Russian Federation (State Contract No. 3.1845.2017/4.6). . - ISSN 2469-9926. - ISSN 2469-9934
   Перевод заглавия: Оптимизация добротности в диэлектрических олигомерах

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
FOURIER MODAL METHOD
   PHOTONIC CRYSTAL
   BOUND-STATES
   ENHANCEMENT
Аннотация: In this paper we propose an optimization procedure for quality-factor (Q-factor) enhancement in dielectric oligomers. The oligomers are introduced as linear periodic chains of dielectric elements the individual Q factors of which are optimized via multipolar conversion in an avoided crossing of two resonant eigenfrequencies. It is demonstrated that when such dielectric elements are assembled into an infinite periodic array the coupling between individual resonances gives rise to an in-Γ optical bound state in the continuum (BIC) unprotected by symmetry. By setting up the oligomers of finite numbers of dielectric elements we observe high quality resonances which occur as traces of the infinite array band structure. The resulting high quality resonances exhibit light localization spots of a few squared wavelengths with Q factors Q ˃10 4. The localization is provided by similarity of the field pattern to that of the BIC with the losses at the edges of the array suppressed due to an almost flat BIC host band. The scaling law of the Q factor against the dielectric permittivity is derived.

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Держатели документа:
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.
RAS, Kirensky Inst Phys, Fed Res Ctr KSC SB, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Maksimov, D. N.; Максимов, Дмитрий Николаевич; Булгаков, Евгений Николаевич; Ministry of Higher Education and Science of the Russian FederationMinistry of Education and Science, Russian Federation [3.1845.2017/4.6]
}
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Effect of surfactants on the structure, phase composition, and magnetic properties of FexSy nanoparticles synthesized by thermal decomposition / R. D. Ivantsov, C.-R. Lin, Y.-Z. Chen [et al.] // Nanobiotechnol. Rep. - 2022. - Vol. 17, Is. 3. - P. 336-344, DOI 10.1134/S2635167622030089. - Cited References: 27. - This study was supported by the Russian Foundation for Basic Research with Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science, the research project no. 19-42-240005: “Features of the Electronic Structure, Magnetic Properties, and Optical Excitations in Nanocrystals of Multifunctional Magnetic Chalcogenides Fe3S4 and FeSe” and the Russian Foundation for Basic Research and the Ministry of Science and Technology of Taiwan, joint projects nos. 19-52-52002 and 109-2112-M-153-003 and 108-2923-M-153-001-MY3. - The electron-microscopy study was carried out at the Laboratory of Electron Microscopy of the Center for Collective Use of the Siberian Federal University within the state assignment of the Ministry of Science and Higher Education of the Russian Federation (research code FSRZ-2020-0011). The magnetic measurements were carried out on a vibrating sample magnetometer at the Krasnoyarsk Regional Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences . - ISSN 2635-1676
Кл.слова (ненормированные):
Agglomeration -- Crystal impurities -- Fourier transform infrared spectroscopy -- High resolution transmission electron microscopy -- Magnetic properties -- Magnetite -- Magnetization -- Nanomagnetics -- Sulfur compounds -- Synthesis (chemical) -- Thermogravimetric analysis -- Thermolysis -- Electron diffraction analysis -- Greigites -- Hexadecylamine -- Inverse spinel structures -- Iron sulfide -- Isostructural -- Octadecyl amine -- Organic shells -- Structures phase -- Synthesised -- Surface active agents
Аннотация: The effect of surfactants on the structure, morphology, and magnetic properties of FexSy iron-sulfide nanoparticles synthesized by thermal decomposition is studied. Oleylamine, hexadecylamine, and octadecylamine are used as surfactants. It is established by X-ray and electron-diffraction analysis combined with Mossbauer spectroscopy that, in samples 1 and 2 prepared using oleylamine and hexadecylamine, respectively, the Fe3S4 greigite phase dominates, with an inverse spinel structure isostructural to the iron oxide Fe3O4 magnetite with minor Fe9S11 impurities. Deviations in the distribution of iron cations over the tetrahedral and octahedral sites relative to the bulk greigite crystals are observed. The nanoparticles synthesized using octadecylamine (sample 3) are found to be multiphase with a greigite fraction of ~20%. In all three cases, as showed the results of transmission electron microscopy and Fourier transform infrared spectroscopy together with thermogravimetry analysis, the magnetic nanoparticles have an organic shell chemically bonded to their magnetic core, which prevents the agglomeration of the particles. This shell is much more massive in samples 2 and 3. The magnetization values for samples 1 and 2 are similar to those of greigite nanoparticles reported in publications, while the magnetization of sample 3 is several times lower, in accordance with the greigite fraction in it. The combination of fairly high magnetization with a massive organic shell allows one to consider hexadecylamine to be a promising surfactant for the synthesis of iron-sulfide nanoparticles protected from external impact and agglomeration.

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Публикация на русском языке Влияние ПАВ на структуру, фазовый состав и магнитные свойства наночастиц FexSy, полученных методом термического разложения [Текст] / Р. Д. Иванцов, Ч. Р. Лин, Ю. Ж. Чэнь [и др.] // Рос. нанотехнол. - 2022. - Т. 17 № 3. - С. 358-367

Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Department of Applied Physics, National Pingtung University, Pingtung City, 90003, Taiwan
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Ivantsov, R. D.; Иванцов, Руслан Дмитриевич; Lin, C. -R.; Chen, Y. -Z.; Ivanova, O. S.; Иванова, Оксана Станиславовна; Altunin, R. R.; Knyazev, Yu. V.; Князев, Юрий Владимирович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Shestakov, N. P.; Шестаков, Николай Петрович; Sukhachev, A. L.; Сухачев, Александр Леонидович; Edelman, I. S.; Эдельман, Ирина Самсоновна
}
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    Effects of endohedral Gd-containing fullerenols with a different number of oxygen substituents on bacterial bioluminescence / E. A. Stepin, E. S. Sushko, N. G. Vnukova [et al.] // Int. J. Mol. Sci. - 2024. - Vol. 25, Is. 2. - Ст. 708, DOI 10.3390/ijms25020708. - Cited References: 102. - This research was funded by the State Assignment of the Ministry of Science and Higher Education of the Russian Federation, project No. 0287-2021-0020, and partly supported by the Russian Science Foundation No. 23-26-10018, Krasnoyarsk Regional Science Foundation . - ISSN 1661-6596. - ISSN 1422-0067
   Перевод заглавия: Влияние эндоэдральных Gd-содержащих фуллеренолов с различным числом кислородных заместителей на биолюминесценцию бактерий
Кл.слова (ненормированные):
endohedral fullerenol -- gadolinium -- bioluminescence -- bacterial bioassay -- toxicity -- enzymatic bioassay -- reactive oxygen species -- density functional tight binding method -- fourier-transform infrared spectroscopy
Аннотация: Gadolinium (Gd)-containing fullerenols are perspective agents for magnetic resonance imaging and cancer research. They combine the unique paramagnetic properties of Gd with solubility in water, low toxicity and antiradical activity of fullerenols. We compared the bioeffects of two Gd-containing fullerenols with a different number of oxygen groups—20 and 42: Gd@C82O20H14 and Gd@C82O42H32. The bioluminescent bacteria-based assay was applied to monitor the toxicity of fullerenols, bioluminescence was applied as a signal physiological parameter, and bacterial enzyme-based assay was used to evaluate the fullerenol effects on enzymatic intracellular processes. Chemiluminescence luminol assay was applied to monitor the content of reactive oxygen species (ROS) in bacterial and enzymatic media. It was shown that Gd@C82O42H32 and Gd@C82O20H14 inhibited bacterial bioluminescence at >10?1 and >10?2 gL?1, respectively, revealing a lower toxicity of Gd@C82O42H32. Low-concentration (10?3–10?1 gL?1) bacterial bioluminescence activation by Gd@C82O42H32 was observed, while this activation was not found under exposure to Gd@C82O20H14. Additional carboxyl groups in the structure of Gd@C82O42H32 were determined by infrared spectroscopy and confirmed by quantum chemical calculations. The groups were supposed to endow Gd@C82O42H32 with higher penetration ability through the cellular membrane, activation ability, lower toxicity, balancing of the ROS content in the bacterial suspensions, and lower aggregation in aqueous media.

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Держатели документа:
Biophysics Department, School of Fundamental Biology and Biotechnology, Siberian Federal University, 660041 Krasnoyarsk, Russia
Institute of Biophysics SB RAS, FRC KSC SB RAS, 660036 Krasnoyarsk, Russia
Institute of Physics SB RAS, FRC KSC SB RAS, 660036 Krasnoyarsk, Russia
Department of Solid State Physics and Nanotechnology, School of Engineering Physics and Radioelectronics, Siberian Federal University, 660074 Krasnoyarsk, Russia
Department of Physical and Inorganic Chemistry, School of Non-Ferrous Metals and Materials Science, Siberian Federal University, 660025 Krasnoyarsk, Russia
Laboratory for Digital Controlled Drugs and Theranostics, FRC KSC SB RAS, 660036 Krasnoyarsk, Russia

Доп.точки доступа:
Stepin, E. A.; Sushko, E. S.; Сушко, Екатерина Сергеевна; Vnukova, N. G.; Внукова, Наталья Григорьевна; Churilov, G. N.; Чурилов, Григорий Николаевич; Rogova, A. V.; Tomilin, F. N.; Томилин, Феликс Николаевич; Kudryasheva, N. S.
}
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Ignatchenko, V. A.
Green’s functions of spin and electromagnetic waves in the sinusoidal superlattice / V. A. Ignatchenko, D. S. Tsikalov // Solid State Phenom. : Selected, peer reviewed papers. - 2015. - Vol. 233-234: Achievements in Magnetism. - P. 47-50, DOI 10.4028/www.scientific.net/SSP.233-234.47 . - ISSN 1662-9779. - ISSN 978-3-038
Кл.слова (ненормированные):
Continued fractions -- Electromagnetic waves -- Green’s functions -- Magnonic crystals -- Photonic crystals -- Sinusoidal modulation -- Spin waves -- Superlattices -- Circular waveguides -- Fourier transforms -- Green's function -- Photonic crystals -- Spin waves -- Superlattices -- Analytical expressions -- Continued fraction -- Fourier transformations -- Magnonic crystals -- S function -- Sinusoidal modulation -- Spectral representations -- Electromagnetic waves
Аннотация: The problem of finding the Green's function of spin and electromagnetic waves in the sinusoidal superlattice is considered. An analytical expression for the spectral representation of the Green's function has been found in the form of ascending continued fractions, the particular denominators of which are ordinary continued fractions. The Green’s function in the r -space has been found by the numerical Fourier transformation of the Greens’s function found in the spectral representation. © (2015) Trans Tech Publications, Switzerland.

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Доп.точки доступа:
Perov, N. \ed.\; Semisalova, A. \ed.\; Tsikalov, D. S.; Цикалов, Денис Сергеевич; Игнатченко, Вальтер Алексеевич; Moscow International Symposium on Magnetism(6 ; 2014 ; June-July ; Moscow)
}
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Magnetic ordering of NdFe3(BO3)(4) studied by infrared absorption spectroscopy / E. P. Chukalina [et al.] // Phys. Lett. A. - 2004. - Vol. 322, Is. 3-4. - P. 239-243, DOI 10.1016/j.physleta.2003.12.062. - Cited References: 8 . - ISSN 0375-9601

РУБ Physics, Multidisciplinary
Рубрики:
CRYSTALS
Кл.слова (ненормированные):
ferroborates -- Fourier-transform spectroscopy -- magnetic ordering -- Ferroborates -- Fourier-transform spectroscopy -- Magnetic ordering -- iron -- neodymium -- absorption spectroscopy -- article -- electronics -- infrared spectroscopy -- magnetism -- molecular interaction -- molecular physics -- temperature
Аннотация: We report the first measurements of the optical spectra of NdFe3(BO3)(4), a promising material for optoelectronics. Exchange splitting of Nd3+ spectral lines due to magnetic interactions in a magnetically ordered state was observed. The temperature dependences of the exchange splitting and of the linewidth point to the temperature T-c 33 +/- 1K of the magnetic ordering in both iron and neodymium. magnetic subsystems. 2004 Elsevier B.V. All rights reserved.

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Держатели документа:
Russian Acad Sci, Inst Spect, Troitsk 142190, Moscow Region, Russia
RAS, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Institute of Spectroscopy, Russian Academy of Sciences, 142190 Troitsk, Moscow Region, Russian Federation
L.V. Kirensky Institute of Physics, Siberian Branch of RAS, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Chukalina, E. P.; Kuritsin, D. Y.; Popova, M. N.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Kharlamova, S. A.; Temerov, V. L.; Темеров, Владислав Леонидович
}
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On the time-optimal implementation of quantum Fourier transform for qudits represented by quadrupole nucleus / V. P. Shauro, V. E. Zobov [et al.] // International Conference "Micro- and nanoelectronics – 2012" : Book of abstracts. - 2012. - Ст. q2-08. - P.

Материалы конференции

Доп.точки доступа:
Shauro, V. P.; Шауро, Виталий Павлович; Zobov, V. E.; Зобов, Владимир Евгеньевич; Shlegel, N. V.; Chimitova, O. D.; Atuchin, V. V.; Атучин, Виктор Валерьевич; Gavrilova, T. A.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Bazarov, B. G.; Базаров Б.Г.; Bazarova, Zh.G.; Базарова Ж.Г.; "Micro- and nanoelectronics – 2012", Int. Conf. (2012 ; окт. ; 1-5 ; Москва / Звенигород, Россия)
}
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Popov, A. K.
Numerical simulations of metamaterial-based infrared sensor for remote environmental monitoring / A. K. Popov, S. A. Myslivets ; Fourier Transform Spectroscopy (10 July - 14 July 2011 ; Toronto) // Opt.InfoBase Conf. Papers. - 2011. - Conference code: 102614. . - ISBN 21622701. - ISBN 9781557529145
Аннотация: The possibility of creation of all-optically controlled, remotely actuated and interrogated, ultraminiature nonlinear-optical sensor, which utilizes negative-index metamaterial and can be exploited for the remote environmental sensing is shown and numerically simulated. © 2011 Optical Society of America.

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Доп.точки доступа:
Myslivets, S. A.; Мысливец, Сергей Александрович; Fourier Transform Spectroscopy(2011 ; Jul. ; 10-14 ; Toronto)
}
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Propagating bound states in the continuum in dielectric gratings / E. N. Bulgakov [et al.] // J. Opt. Soc. Am. B. - 2018. - Vol. 35, Is. 6. - P. 1218-1222, DOI 10.1364/JOSAB.35.001218. - Cited References: 51 . - ISSN 0740-3224
Кл.слова (ненормированные):
Bound state -- Dielectric grating -- Fourier -- Variation of Parameters
Аннотация: We consider propagating bound states in the continuum in dielectric gratings. The gratings consist of a slab with ridges periodically arranged either on top or on both sides of the slab. Based on the Fourier modal approach, we recover the leaky zones above the line of light to identify the geometries of the gratings supporting Bloch bound states propagating in the direction perpendicular to the ridges. Most importantly, it is demonstrated that if a two-sided grating possesses either mirror or glide symmetry, the Bloch bound states are stable to variation of parameters as long as the above symmetries are preserved.

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Держатели документа:
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Bulgakov, E. N.; Булгаков, Евгений Николаевич; Maksimov, D. N.; Максимов, Дмитрий Николаевич; Semina, P. N.; Skorobogatov, S. A.
}
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10.

    Shauro, V. P.
    Global phase and minimum time of quantum Fourier transform for qudits represented by quadrupole nuclei / V. P. Shauro, V. E. Zobov // Phys. Rev. A. - 2013. - Vol. 88, Is. 4. - Ст. 42320. - P. , DOI 10.1103/PhysRevA.88.042320. - Cited References: 33 . - ISSN 1050-2947
   Перевод заглавия: Глобальная фаза и минимальное время квантового преобразования Фурье для кудитов, представленных квадрупольными ядрами

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
ALGORITHMS
Аннотация: We demonstrate the relation between a global phase of the quantum gate and the layout of energy levels of its effective Hamiltonian required for implementing the gate for minimum time. By an example of the quantum Fourier transform gate for a qudit represented by a quadrupole nucleus with the spin I = 1, the effective Hamiltonians and minimum implementation times for different global phases are found. Using numerical optimal control methods, the problem of the global phase in searching for the optimal pulse shape is considered in detail for the quantum Fourier transform gate at I = 1, 3/2, 2, and 5/2. It is shown that at the constrained control time the gradient algorithms can converge to the solutions corresponding to different global phases or the same global phase with different minimum times of the gate implementation.

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Доп.точки доступа:
Zobov, V. E.; Зобов, Владимир Евгеньевич; Шауро, Виталий Павлович
}
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11.

Shauro, V. P.
On the time-optimal implementation of quantum Fourier transform for qudits represented by quadrupole nucleus : Proceedings Paper / V. P. Shauro, V. E. Zobov ; ed. V. P. Shauro ; Int. Conf. on Micro- and Nano-Electronics // Pros. SPIE. - 2012. - Vol. 8700. - Ст. 87001G, DOI 10.1117/12.2016983. - Cited References: 15 . - ISSN 0277-786X. - ISSN 978-0-819

РУБ Nanoscience & Nanotechnology + Optics
Рубрики:
ALGORITHMS
Кл.слова (ненормированные):
qudit -- quantum Fourier transform -- time-optimal control -- nuclear magnetic resonance
Аннотация: We consider the problem of time-optimal realization of the quantum Fourier transform gate for a single qudit with number of levels d from 3 to 8. As a qudit the quadrupole nucleus with spin I > 1/2 controlled by NMR is considered. We calculate the dependencies of the gate error on the duration of radio-frequency pulse obtained by numerical optimization using Krotov-based algorithm. It is shown that the dependences of minimum time of QFT gate implementation on qudit dimension are different for integer and half-integer spins.

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Доп.точки доступа:
Zobov, V. E.; Зобов, Владимир Евгеньевич; Shauro, V. P. \ed.\; Шауро, Виталий Павлович; International Conference on Micro- and Nano-Electronics (Oct. 1-5, 2012 ; Zvenigorod, Russia)
}
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12.

Solovev, P. N.
Microstructural and magnetic properties of thin obliquely deposited films: A simulation approach / P. N. Solovev, A. V. Izotov, B. A. Belyaev // J. Magn. Magn. Mater. - 2017. - Vol. 429. - P. 45-51, DOI 10.1016/j.jmmm.2017.01.012. - Cited References: 44. - This work was supported by Russian Science Foundation (Project no.16-12-10140). . - ISSN 0304-8853
Кл.слова (ненормированные):
Fourier space approach -- Magnetic anisotropy -- Netzelmann approach -- Oblique deposition -- Thin film growth simulation
Аннотация: The relation between microstructural and magnetic properties of thin obliquely deposited films has been studied by means of numerical techniques. Using our developed simulation code based on ballistic deposition model and Fourier space approach, we have investigated dependences of magnetometric tensor components and magnetic anisotropy parameters on the deposition angle of the films. A modified Netzelmann approach has been employed to study structural and magnetic parameters of an isolated column in the samples with tilted columnar microstructure. Reliability and validity of used numerical methods is confirmed by a good agreement of the calculation results with each other, as well as with our experimental data obtained by the ferromagnetic resonance measurements of obliquely deposited thin Ni80Fe20 films. The combination of these numerical methods can be used to design a magnetic film with a desirable value of uniaxial magnetic anisotropy and to extract the obliquely deposited film structure from only magnetic measurements. © 2017 Elsevier B.V.

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Держатели документа:
Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, 50/38, Akademgorodok, Krasnoyarsk, Russian Federation
Siberian Federal University, 79, pr. Svobodnyi, Krasnoyarsk, Russian Federation
Reshetnev Siberian State Aerospace University, 31, pr. Imeni Gazety “Krasnoyarskii Rabochii”, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Izotov, A. V.; Изотов, Андрей Викторович; Belyaev, B. A.; Беляев, Борис Афанасьевич; Соловьев, Платон Николаевич
}
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13.

Zobov, V. E.
Implementation of the quantum order-finding algorithm on two qudits / V. E. Zobov, V. P. Shauro, A. S. Ermilov // JETP Letters. - 2008. - Vol. 87, Is. 6. - P. 334-339, DOI 10.1134/S0021364008060143. - Cited References: 24 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
EXPERIMENTAL REALIZATION
   FOURIER-TRANSFORM
   COMPUTATION
   SYSTEMS
   GATES
Аннотация: A quantum circuit has been proposed for the algorithm for finding the permutation order on two qudits with the number of levels d(1) and d(2). The sequence of the RF pulses for implementing the algorithm on two quadrupole nuclei I-1 = 7/2 (d(1) = 8) and I-2 = 3/2 (d(2) = 4) has been calculated and the algorithm has been numerically simulated. A method for preparing pseudopure states has been presented. A comparison with the implementation of the algorithm by NMR methods on five qubits has been performed.

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Держатели документа:
[Zobov, V. E.
Ermilov, A. S.] Russian Acad Sci, Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Shauro, V. P.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Shauro, V. P.; Шауро, Виталий Павлович; Ermilov, A. S.; Зобов, Владимир Евгеньевич
}
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14.

Zobov, V. E.
On time-optimal NMR control of states of qutrits represented by quadrupole nuclei with the spin I=1 / V. E. Zobov, V. P. Shauro // J. Exp. Theor. Phys. - 2011. - Vol. 113, Is. 2. - P. 181-191, DOI 10.1134/S1063776111060094. - Cited References: 48. - This work was supported by the Russian Foundation for Basic Research (project no. 09-07-00138) and the Dynasty Foundation. . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
QUANTUM COMPUTATION
   MAGNETIC-RESONANCE
   ALGORITHMS
   ELEMENTS
   PULSES
   DESIGN
   QUDITS
   GATES
Кл.слова (ненормированные):
Logical operators -- Nuclear spins -- Numerical optimizations -- Optimality -- Physical parameters -- Quadrupole nuclei -- Qutrits -- Radio frequencies -- RF pulse -- Three level systems -- Time dependence -- Time-optimal -- Computer control systems -- Computer simulation -- Fourier transforms -- Optimization -- Quantum computers -- Resonance -- Nuclear quadrupole resonance
Аннотация: Elementary logical operators (selective rotation, Fourier transform, controllable phase shift, and SUM gate) are considered for a quantum computer based on three-level systems (qutrits) represented by nuclear spins I = 1 under nuclear magnetic resonance conditions. The computer simulation of the realization of these operators by means of simple and composite selective radiofrequency (RF) pulses and optimized RF pulses is performed. The time dependence of the amplitude of last pulses is found by numerical optimization at different durations. Two variants are proposed for realization of a two-qutrit SUM gate by using one-qutrit or two-qutrit optimized RF pulses. The calculated time dependences of realization errors were used to study the time optimality of different methods for obtaining gates, proposed earlier and in this paper. The advantages and disadvantages of each of the methods are evaluated for different values of physical parameters.

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Держатели документа:
[Zobov, V. E.
Shauro, V. P.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
L.V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Shauro, V. P.; Шауро, Виталий Павлович; Зобов, Владимир Евгеньевич
}
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15.

Zobov, V. E.
Pulse sequences for realizing the quantum Fourier transform on multilevel systems / V. E. Zobov, A. S. Ermilov // JETP Letters. - 2006. - Vol. 83, Is. 10. - P. 467-471, DOI 10.1134/S0021364006100092. - Cited References: 16 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary

Аннотация: Sequences of selective pulses of an RF magnetic field for realizing the quantum Fourier transform by NMR methods on systems with four, six, and eight nonequidistant levels are found using the virtual spin formalism. The results can be applied to other quantum systems when laser pulses are used.

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Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Div, Akademgorodok, Krasnoyarsk 660036, Russia
ИФ СО РАН
KirenskiI Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Ermilov, A. S.; Зобов, Владимир Евгеньевич
}
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16.

Zobov, V. E.
Selective control of the states of multilevel quantum systems using nonselective rotation operators / V. E. Zobov, V. P. Shauro // J. Exp. Theor. Phys. - 2009. - Vol. 108, Is. 1. - P. 5-17, DOI 10.1134/S1063776109010026. - Cited References: 20 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
FOURIER-TRANSFORM
SPIN
Кл.слова (ненормированные):
Quantum electronics -- Quantum optics -- Quadrupole nucleus -- Quantum systems -- Radio frequencies -- RF fields -- Rf pulse -- Selective controls -- Selective pulse -- Rotation
Аннотация: We have calculated the sequences of nonselective rotation operators separated by intervals of free evolution that perform selective rotations between adjacent levels in systems with three, four, five, and six nonequidistant levels. We have numerically simulated the realization of the calculated sequences for quadrupole nuclei with corresponding spins controlled by intense nonselective radio-frequency (RF) pulses and investigated the dependences of the realization error on the parameters of external and internal interactions. To reduce the error when the RF field is not strong enough, we have found composite nonselective RF pulses consisting of five simple ones. We show that the error of the composite selective rotation operator can be reduced signifi- cantly in comparison to the error of a simple single selective pulse.

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Scopus,
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Держатели документа:
[Zobov, V. E.] Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
[Shauro, V. P.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Shauro, V. P.; Шауро, Виталий Павлович; Зобов, Владимир Евгеньевич
}
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