Quantum algorithms parallelization with quantum teleportation
Quantum algorithms parallelization with quantum teleportation
S. S. Sysoev
In this work, a method for parallelizing quantum algorithms in the circuit model is proposed, based on the technique of quantum gate teleportation. The parallel representation of the algorithm obtained in this way has a reduced circuit depth and, consequently, a higher probability of correct execution under conditions of quantum state decoherence that increases over time. The reduction of the circuit length is achieved by increasing its width—the number of qubits used simultaneously in computations.
Show AbstractDual symmetry of effective dense QCD models
Dual symmetry of effective dense QCD models
R. N. Zhokhov$^1$, T. G. Khunjua$^2$, K. G. Klimenko$^3$
In this paper, we study the symmetry properties of the phase diagram of dense quark matter consisting of $u$ and $d$ three-color quarks within the framework of massless (3+1)-dimensional Nambu-Jona-Lasinio models and quantum chromodynamics. It turns out that in the presence of baryon $\mu_B$, isospin $\mu_I$, chiral $\mu_5$ and chiral isospin $\mu_{I5}$ chemical potentials, the Lagrangians of these models are invariant under the so-called dual transformation. Consequently, the total thermodynamic potentials of these models are dually symmetric. This means that in the full $(\mu_B,\mu_I,\mu_5,\mu_{I5})$-phase portraits of these models, the phases with spontaneous breaking of chiral symmetry and condensation of charged pions are dually conjugate (symmetric) to each other.
Show AbstractRadial dependence of the nucleon effective mass and the ground-state properties of magic nuclei
Radial dependence of the nucleon effective mass and the ground-state properties of magic nuclei
D. Yu. Smoliannikov$^1$, N. N. Arsenyev$^1$, A. P. Severyukhin$^{1,2}$
The contributions of various terms to the nucleon effective mass are analyzed using the self-consistent Hartree-Fock method based on Skyrme-type energy density functional (EDF). The terms of the EDF that impacts nucleon effective mass at the surface of a nucleus has been included. The effects of these terms on the ground-state properties (nuclear charge radii, binding energy and single-particle spectra) of doubly closed shell nuclei $^{16}$O, $^{40,48}$Ca, $^{56,78}$Ni, $^{100,132}$Sn and $^{208}$Pb are examined. It has been found that the radial dependence of nucleons' effective mass influences both the density diffuseness and the scheme of single-particle levels near the Fermi level. Two new sets of parameters for the nuclear density functional have been proposed.
Show AbstractIssues of Improving the Efficiency and Resolution of the Neutron Spectrometer for the National Center for Physics and Mathematics
Issues of Improving the Efficiency and Resolution of the Neutron Spectrometer for the National Center for Physics and Mathematics
A. M. Lapik$^1$, S. S. Belyshev$^2$, V. V. Varlamov$^3$, L. Z. Dzhilavyan$^1$, A. A. Kuznetsov$^{2,3}$, A. L. Polonski$^1$, A. V. Rusakov$^1$, V. I. Shvedunov$^3$
For γ-quantum energies in the E1 GR region, the following is analyzed: requirements for (γ, n)-experiments with fast neutron spectrometry; parameters of collimated Compton radiation sources HIγS and NCPhM; characteristics of the neutron spectrometer proposed for NCPhM; principles of one-dimensional time-coordinate compensation for neutron spectrometer scintillators. Initial experiments have been conducted to study the possibilities of improving the efficiency and resolution of such a neutron spectrometer using the time-coordinate compensation method
Show AbstractСхема квантовых коммуникаций, описываемая регулярным четырехмерным комплексным политопом
Схема квантовых коммуникаций, описываемая регулярным четырехмерным комплексным политопом
А. Ю. Власов$^{1,2}$
В настоящее время обобщения протоколов квантовых коммуникаций с кубитов на системы с более высокой размерностью пространства состояний (кудиты) обычно используют взаимно несмещённые базисы, конструкция которых известна в любой размерности равной степени простого числа. Однако, в небольших размерностях также существуют формально более симметричные системы состояний, описываемые регулярными комплексными политопами, являющимися обобщением идеи правильных многогранников на комплексные пространства. В данной работе рассматривается применение модели, изначально предложенной Р. Пенроузом и построенной на основе геометрии додекаэдра и двух квантово запутанных частиц со спином 3/2. В более общем случае вместо них можно использовать две произвольные квантовые системы с четырьмя базисными состояниями (кукварты). В дальнейшем было показано, что эта система из 40 состояний эквивалентна конфигурации Виттинга и связанна с четырехмерным комплексным политопом описанным Кокстером. В работе предложен использующий данную конфигурацию протокол квантового распределения ключей, основанный на контекстуальности.
Show AbstractRadiation technologies for the treatment of biological objects
Radiation technologies for the treatment of biological objects
A. P. Chernyaev$^{1,2}$, V. V. Rozanov$^{1,3}$, E. K. Kozlova$^{1,4}$, I. V. Matveychuk$^3$, U. A. Bliznyuk$^{1,2}$, V. S. Ipatova$^2$
The article provides an overview of the current state of application of radiation technology in food processing and biomedical products in the world and in Russia. The history of the development of radiation technology and its connection with the development of radiation engineering facilities used for processing biological objects and materials is described. The characteristics of radiation sources and doses used in the processing of food and biomedical products are presented. The main international and national standards governing radiation processing of food products and medical devices, dose control and methods of identification of irradiated food products are presented. The article studies the physical mechanisms of radiation effects on target microorganisms and surrounding biological macromolecules in irradiated biological objects. The main Russian research centers conducting research in the field of radiation treatment of biological objects and materials are given, and industrial centers providing radiation treatment services in the Russian Federation are presented. The article provides an overview of the main directions and results of research on optimization of radiation processing of biological objects and materials carried out at the Department of Accelerator Physics and Radiological Medicine, Faculty of Physics, Moscow State University over the past 15–20 years.
Show AbstractThe investigation of topography and mechanical properties of the living cell-hydrogel system by scanning ion-conduction microscopy
The investigation of topography and mechanical properties of the living cell-hydrogel system by scanning ion-conduction microscopy
T. N. Tikhonova$^1$, A. V. Barkovaya$^2$, V. V. Mamed-Nabizade$^3$, V. S. Kolmogorov$^3$, S. T. Matskeplishvili$^4$, N. N. Sysoev$^5$, A. S. Erofeev$^3$, V. V. Fadeev$^5$
Hydrogels are currently gaining interest due to their unique characteristics for use in various applications such as regenerative medicine, 3D cell culturing and drug delivery. The main challenge in the application of hydrogels in tissue engineering is the accurate assessment of their mechanical characteristics. In this work, a non-invasive scanning ion-conduction microscopy (SIPM) method is used to determine the stiffness of living human neuroblastoma SH-SY5Y cells grown on a soft, self-organizing hydrogel made of Fmoc-FF peptide. Young's modulus for SH-SY5Y cells decreases with increasing substrate stiffness, with values of 1015 Pa and 750 Pa on petri dish and Fmoc-FF hydrogel, respectively. This method enables simultaneous investigation of the stiffness of living cells and soft hydrogels, which is promising in the field of regenerative medicine.
Show AbstractDynamics of paramagnetic centers in hafnium oxide during electron beam deposition
Dynamics of paramagnetic centers in hafnium oxide during electron beam deposition
E. A. Konstantinova, A. V. Koroleva, A. V. Pavlikov, E. V. Kytina, A. S. Ilin, M. N. Martyshov
Hafnium oxide, which has a high permittivity, is of interest for use as memristors in electronics. In this paper, a comparative analysis of the type and main characteristics of paramagnetic centers in a series of samples that underwent successive synthesis stages: from the initial target sample to the film on the substrate is performed for the first time. It is found that the main type of defects in the studied materials are oxygen vacancies with an unpaired electron (F+ centers). It is found that during the sputtering of the target (crystalline hafnium oxide), the concentration of F+ centers decreases, probably, during the recharging process. It is found that in the sputtered hafnium oxide film, the concentration of F+ defects increases by an order of magnitude. The discovered experimental fact is explained by the disordered (amorphous) structure of the film. The obtained results are of great importance from both fundamental and practical points of view, since F+ are charge carrier trapping centers and, therefore, have a significant impact on the electronic characteristics of hafnium oxide, which determine its use in electronic devices.
Show AbstractLight coupling devices for subwavelength waveguides based on second order surfaces manufactured by two-photon laser lithography
Light coupling devices for subwavelength waveguides based on second order surfaces manufactured by two-photon laser lithography
I. O. Batuev$^1$, K. A. Smirnov$^1$, I. I. Tsiniaikin$^2$, A. I. Maydykovskiy$^1$, T. V. Murzina$^1$
Light input/output devices are essential for coupling between bulk and fiber optical devices and photonic integrated circuits (PIC). In this work, broadband couplers for optical waveguides lifted from the surface, were fabricated by two-photon laser lithography, and comparison with numerical modeling was conducted. It was demonstrated experimentally that the ellipsoid-based coupler is optimal for coupling light with the waveguide. Average transmittance of a system of two adapters in the spectral range 700-1000 nm for s-polarized radiation amounted to at least 27%.
Show AbstractAn algorithm for study transiting exoplanet candidates by the MASTER global robotic telescope net
An algorithm for study transiting exoplanet candidates by the MASTER global robotic telescope net
A. N. Tarasenkov$^{1,3}$, V. M. Lipunov$^{1,2}$, A. S. Kuznetsov$^1$, N. M. Budnev$^4$, A. G. Tlatov$^5$, V. V. Yurkov$^6$
The paper presents the basic principles of photometric research of exoplanet candidates through the analysis of archival wide-field images obtained on robotic telescopes of the MASTER global network of Moscow State University. An algorithm for studying candidates for transiting exoplanets was proposed and applied to study and search for candidates for transiting exoplanets. It which does not interfere with the performance of the main tasks of the MASTER network - detection of optical components of high-energy astrophysical sources and study of the processes occurring in them on various time scales. A number of candidates from the field of microquasar V404 Cyg were studied. For the candidate TOI-3570.01, a light curve was obtained during the transit of a putative exoplanet with a high photometric accuracy.
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