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S. V. Ter-antonyan - One of the best experts on this subject based on the ideXlab platform.
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Rigidity-dependent cosmic ray Energy Spectra in the knee region obtained with the GAMMA experiment
Astroparticle Physics, 2007Co-Authors: A.p. Garyaka, S. V. Ter-antonyan, R. M. Martirosov, N. M. Nikolskaya, Y.a. Gallant, L. Jones, J. ProcureurAbstract:On the basis of the extensive air shower (EAS) data obtained by the GAMMA experiment, the Energy Spectra and elemental composition of the primary cosmic rays are derived in the 1-100 PeV Energy range. The reconstruction of the primary Energy Spectra is carried out using an EAS inverse approach in the framework of the SIBYLL2.1 and QGSJET01 interaction models and the hypothesis of power-law primary Energy Spectra with rigidity-dependent knees. The Energy Spectra of primary H, He, O-like and Fe-like nuclei obtained with the SIBYLL interaction model agree with corresponding extrapolations of the balloon and satellite data to ~1 PeV energies. The Energy Spectra obtained from the QGSJET model show a predominantly proton composition in the knee region. The rigidity-dependent knee feature of the primary Energy Spectra for each interaction model is displayed at the following rigidities: ~2.5+/-0.2 PV (SIBYLL) and ~3.1-4.2 PV (QGSJET). All the results presented are derived taking into account the detector response, the reconstruction uncertainties of the EAS parameters, and fluctuations in the EAS development.
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Mutually compensative pseudo solutions of primary Energy Spectra in the knee region
Astroparticle Physics, 2007Co-Authors: S. V. Ter-antonyanAbstract:Abstract The problem of the uniqueness of solutions during the evaluation of primary Energy Spectra in the knee region using an extensive air shower (EAS) data set and the EAS inverse approach is investigated. It is shown that the unfolding of primary Energy Spectra in the knee region leads to mutually compensative pseudo solutions. These solutions may be the reason for the observed disagreements in the elementary Energy Spectra of cosmic rays in the 1–100 PeV Energy range obtained from different experiments.
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Rigidity-dependent cosmic ray Energy Spectra in the knee region obtained with the GAMMA experiment
Astroparticle Physics, 2007Co-Authors: A.p. Garyaka, S. V. Ter-antonyan, R. M. Martirosov, N. M. Nikolskaya, L. W. Jones, Y.a. Gallant, J. ProcureurAbstract:Abstract On the basis of the extensive air shower (EAS) data obtained by the GAMMA experiment, the Energy Spectra and elemental composition of the primary cosmic rays are derived in the 10 3 – 10 5 TeV Energy range. The reconstruction of the primary Energy Spectra is carried out using an EAS inverse approach in the framework of the SIBYLL2.1 and QGSJET01 interaction models and the hypothesis of power-law primary Energy Spectra with rigidity-dependent knees. The Energy Spectra of primary H, He, O-like and Fe-like nuclei obtained with the SIBYLL interaction model agree with corresponding extrapolations of the balloon and satellite data to ∼103 TeV energies. The Energy Spectra obtained from the QGSJET model show a predominantly proton composition in the knee region. The rigidity-dependent knee feature of the primary Energy Spectra for each interaction model is displayed at the following rigidities: E R ≃ 2500 ± 200 TV (SIBYLL) and E R ≃ 3100 – 4200 TV (QGSJET). All the results presented are derived taking into account the detector response, the reconstruction uncertainties of the EAS parameters, and fluctuations in the EAS development.
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Primary Energy Spectra and Elemental Composition. GAMMA Experiment
2005Co-Authors: S. V. Ter-antonyan, R. M. Martirosov, A.p. Garyaka, V. S. Eganov, N. M. Nikolskaya, T. Episkoposyan, J. Procureur, Yves Gallant, L. W. JonesAbstract:On the basis of the Extensive Air Shower data observed by the GAMMA experiment the Energy Spectra and elemental composition of the primary cosmic rays have been derived in the 1-100 PeV Energy range. Reconstruction of the primary Energy Spectra is carried out in the framework of the SIBYLL and QGSJET interaction models and the hypothesis of the power-law steepening primary Energy Spectra. All presented results are derived taking into account the detector response, reconstruction uncertainties of EAS parameters and fluctuation of EAS development.
W.s. Dias - One of the best experts on this subject based on the ideXlab platform.
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Aperiodic space-inhomogeneous quantum walks: Localization properties, Energy Spectra, and enhancement of entanglement.
Physical Review E, 2019Co-Authors: A. R. C. Buarque, W.s. DiasAbstract:We study the localization properties, Energy Spectra, and coin-position entanglement of the aperiodic discrete-time quantum walks. The aperiodicity is described by spatially dependent quantum coins distributed on the lattice, whose distribution is neither periodic (Bloch-like) nor random (Anderson-like). Within transport properties we identified delocalized and localized quantum walks mediated by a proper adjusting of aperiodic parameter. Both scenarios are studied by exploring typical quantities (inverse participation ratio, survival probability, and wave packet width), as well as the Energy Spectra of an associated effective Hamiltonian. By using the Energy Spectra analysis, we show that the early stage the inhomogeneity leads to a vanishing gap between two main bands, which justifies the predominantly delocalized character observed for ν 0.5. For ν high enough, we observe an Energy Spectra, which resembles that described by the one-dimensional Anderson model. Within coin-position entanglement, we show many settings in which an enhancement in the ability to entangle is observed. This behavior brings new information about the role played by aperiodicity on the coin-position entanglement for static inhomogeneous systems, reported before as almost always reducing the entanglement when comparing with the homogeneous case. We extend the analysis in order to show that systems with static inhomogeneity are able to exhibit asymptotic limit of entanglement.
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Aperiodic space-inhomogeneous quantum walks: localization properties, Energy Spectra and enhancement of entanglement
arXiv: Quantum Physics, 2018Co-Authors: A. R. C. Buarque, W.s. DiasAbstract:We study the localization properties, Energy Spectra and coin-position entanglement of the aperiodic discrete-time quantum walks. The aperiodicity is described by spatially dependent quantum coins distributed on the lattice, whose distribution is neither periodic (Bloch-like) nor random (Anderson-like). Within transport properties we identified delocalized/localized quantum walks mediated by a proper adjusting of aperiodic parameter. Both scenarios are studied by exploring typical quantities (inverse participation ratio and survival probability), as well as the Energy Spectra of an associated effective Hamiltonian. By using the Energy Spectra analysis, we show that the early stage the inhomogeneity leads to vanishing gap between two main bands, which justifies the the delocalized character observed for $\nu 0.5$. For $\nu$ high enough we observe an Energy Spectra which resembles that described by the 1d Anderson model. Within coin-position entanglement, we show many settings in which an enhancement in the ability to entangle is observed. This behavior brings new informations about the role played by aperiodicity on the coin-poisition entanglement for static inhomogeneous systems, reported before as almost always reducing the entanglement when comparing with the homogeneous case. We extend the analysis in order to show that systems with static inhomogeneity are able to exhibit asymptotic limit of entanglement.
J. Procureur - One of the best experts on this subject based on the ideXlab platform.
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Rigidity-dependent cosmic ray Energy Spectra in the knee region obtained with the GAMMA experiment
Astroparticle Physics, 2007Co-Authors: A.p. Garyaka, S. V. Ter-antonyan, R. M. Martirosov, N. M. Nikolskaya, L. W. Jones, Y.a. Gallant, J. ProcureurAbstract:Abstract On the basis of the extensive air shower (EAS) data obtained by the GAMMA experiment, the Energy Spectra and elemental composition of the primary cosmic rays are derived in the 10 3 – 10 5 TeV Energy range. The reconstruction of the primary Energy Spectra is carried out using an EAS inverse approach in the framework of the SIBYLL2.1 and QGSJET01 interaction models and the hypothesis of power-law primary Energy Spectra with rigidity-dependent knees. The Energy Spectra of primary H, He, O-like and Fe-like nuclei obtained with the SIBYLL interaction model agree with corresponding extrapolations of the balloon and satellite data to ∼103 TeV energies. The Energy Spectra obtained from the QGSJET model show a predominantly proton composition in the knee region. The rigidity-dependent knee feature of the primary Energy Spectra for each interaction model is displayed at the following rigidities: E R ≃ 2500 ± 200 TV (SIBYLL) and E R ≃ 3100 – 4200 TV (QGSJET). All the results presented are derived taking into account the detector response, the reconstruction uncertainties of the EAS parameters, and fluctuations in the EAS development.
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Rigidity-dependent cosmic ray Energy Spectra in the knee region obtained with the GAMMA experiment
Astroparticle Physics, 2007Co-Authors: A.p. Garyaka, S. V. Ter-antonyan, R. M. Martirosov, N. M. Nikolskaya, Y.a. Gallant, L. Jones, J. ProcureurAbstract:On the basis of the extensive air shower (EAS) data obtained by the GAMMA experiment, the Energy Spectra and elemental composition of the primary cosmic rays are derived in the 1-100 PeV Energy range. The reconstruction of the primary Energy Spectra is carried out using an EAS inverse approach in the framework of the SIBYLL2.1 and QGSJET01 interaction models and the hypothesis of power-law primary Energy Spectra with rigidity-dependent knees. The Energy Spectra of primary H, He, O-like and Fe-like nuclei obtained with the SIBYLL interaction model agree with corresponding extrapolations of the balloon and satellite data to ~1 PeV energies. The Energy Spectra obtained from the QGSJET model show a predominantly proton composition in the knee region. The rigidity-dependent knee feature of the primary Energy Spectra for each interaction model is displayed at the following rigidities: ~2.5+/-0.2 PV (SIBYLL) and ~3.1-4.2 PV (QGSJET). All the results presented are derived taking into account the detector response, the reconstruction uncertainties of the EAS parameters, and fluctuations in the EAS development.
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Primary Energy Spectra and Elemental Composition. GAMMA Experiment
2005Co-Authors: S. V. Ter-antonyan, R. M. Martirosov, A.p. Garyaka, V. S. Eganov, N. M. Nikolskaya, T. Episkoposyan, J. Procureur, Yves Gallant, L. W. JonesAbstract:On the basis of the Extensive Air Shower data observed by the GAMMA experiment the Energy Spectra and elemental composition of the primary cosmic rays have been derived in the 1-100 PeV Energy range. Reconstruction of the primary Energy Spectra is carried out in the framework of the SIBYLL and QGSJET interaction models and the hypothesis of the power-law steepening primary Energy Spectra. All presented results are derived taking into account the detector response, reconstruction uncertainties of EAS parameters and fluctuation of EAS development.
A. R. C. Buarque - One of the best experts on this subject based on the ideXlab platform.
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Aperiodic space-inhomogeneous quantum walks: Localization properties, Energy Spectra, and enhancement of entanglement.
Physical Review E, 2019Co-Authors: A. R. C. Buarque, W.s. DiasAbstract:We study the localization properties, Energy Spectra, and coin-position entanglement of the aperiodic discrete-time quantum walks. The aperiodicity is described by spatially dependent quantum coins distributed on the lattice, whose distribution is neither periodic (Bloch-like) nor random (Anderson-like). Within transport properties we identified delocalized and localized quantum walks mediated by a proper adjusting of aperiodic parameter. Both scenarios are studied by exploring typical quantities (inverse participation ratio, survival probability, and wave packet width), as well as the Energy Spectra of an associated effective Hamiltonian. By using the Energy Spectra analysis, we show that the early stage the inhomogeneity leads to a vanishing gap between two main bands, which justifies the predominantly delocalized character observed for ν 0.5. For ν high enough, we observe an Energy Spectra, which resembles that described by the one-dimensional Anderson model. Within coin-position entanglement, we show many settings in which an enhancement in the ability to entangle is observed. This behavior brings new information about the role played by aperiodicity on the coin-position entanglement for static inhomogeneous systems, reported before as almost always reducing the entanglement when comparing with the homogeneous case. We extend the analysis in order to show that systems with static inhomogeneity are able to exhibit asymptotic limit of entanglement.
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Aperiodic space-inhomogeneous quantum walks: localization properties, Energy Spectra and enhancement of entanglement
arXiv: Quantum Physics, 2018Co-Authors: A. R. C. Buarque, W.s. DiasAbstract:We study the localization properties, Energy Spectra and coin-position entanglement of the aperiodic discrete-time quantum walks. The aperiodicity is described by spatially dependent quantum coins distributed on the lattice, whose distribution is neither periodic (Bloch-like) nor random (Anderson-like). Within transport properties we identified delocalized/localized quantum walks mediated by a proper adjusting of aperiodic parameter. Both scenarios are studied by exploring typical quantities (inverse participation ratio and survival probability), as well as the Energy Spectra of an associated effective Hamiltonian. By using the Energy Spectra analysis, we show that the early stage the inhomogeneity leads to vanishing gap between two main bands, which justifies the the delocalized character observed for $\nu 0.5$. For $\nu$ high enough we observe an Energy Spectra which resembles that described by the 1d Anderson model. Within coin-position entanglement, we show many settings in which an enhancement in the ability to entangle is observed. This behavior brings new informations about the role played by aperiodicity on the coin-poisition entanglement for static inhomogeneous systems, reported before as almost always reducing the entanglement when comparing with the homogeneous case. We extend the analysis in order to show that systems with static inhomogeneity are able to exhibit asymptotic limit of entanglement.
A.p. Garyaka - One of the best experts on this subject based on the ideXlab platform.
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Rigidity-dependent cosmic ray Energy Spectra in the knee region obtained with the GAMMA experiment
Astroparticle Physics, 2007Co-Authors: A.p. Garyaka, S. V. Ter-antonyan, R. M. Martirosov, N. M. Nikolskaya, L. W. Jones, Y.a. Gallant, J. ProcureurAbstract:Abstract On the basis of the extensive air shower (EAS) data obtained by the GAMMA experiment, the Energy Spectra and elemental composition of the primary cosmic rays are derived in the 10 3 – 10 5 TeV Energy range. The reconstruction of the primary Energy Spectra is carried out using an EAS inverse approach in the framework of the SIBYLL2.1 and QGSJET01 interaction models and the hypothesis of power-law primary Energy Spectra with rigidity-dependent knees. The Energy Spectra of primary H, He, O-like and Fe-like nuclei obtained with the SIBYLL interaction model agree with corresponding extrapolations of the balloon and satellite data to ∼103 TeV energies. The Energy Spectra obtained from the QGSJET model show a predominantly proton composition in the knee region. The rigidity-dependent knee feature of the primary Energy Spectra for each interaction model is displayed at the following rigidities: E R ≃ 2500 ± 200 TV (SIBYLL) and E R ≃ 3100 – 4200 TV (QGSJET). All the results presented are derived taking into account the detector response, the reconstruction uncertainties of the EAS parameters, and fluctuations in the EAS development.
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Rigidity-dependent cosmic ray Energy Spectra in the knee region obtained with the GAMMA experiment
Astroparticle Physics, 2007Co-Authors: A.p. Garyaka, S. V. Ter-antonyan, R. M. Martirosov, N. M. Nikolskaya, Y.a. Gallant, L. Jones, J. ProcureurAbstract:On the basis of the extensive air shower (EAS) data obtained by the GAMMA experiment, the Energy Spectra and elemental composition of the primary cosmic rays are derived in the 1-100 PeV Energy range. The reconstruction of the primary Energy Spectra is carried out using an EAS inverse approach in the framework of the SIBYLL2.1 and QGSJET01 interaction models and the hypothesis of power-law primary Energy Spectra with rigidity-dependent knees. The Energy Spectra of primary H, He, O-like and Fe-like nuclei obtained with the SIBYLL interaction model agree with corresponding extrapolations of the balloon and satellite data to ~1 PeV energies. The Energy Spectra obtained from the QGSJET model show a predominantly proton composition in the knee region. The rigidity-dependent knee feature of the primary Energy Spectra for each interaction model is displayed at the following rigidities: ~2.5+/-0.2 PV (SIBYLL) and ~3.1-4.2 PV (QGSJET). All the results presented are derived taking into account the detector response, the reconstruction uncertainties of the EAS parameters, and fluctuations in the EAS development.
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Primary Energy Spectra and Elemental Composition. GAMMA Experiment
2005Co-Authors: S. V. Ter-antonyan, R. M. Martirosov, A.p. Garyaka, V. S. Eganov, N. M. Nikolskaya, T. Episkoposyan, J. Procureur, Yves Gallant, L. W. JonesAbstract:On the basis of the Extensive Air Shower data observed by the GAMMA experiment the Energy Spectra and elemental composition of the primary cosmic rays have been derived in the 1-100 PeV Energy range. Reconstruction of the primary Energy Spectra is carried out in the framework of the SIBYLL and QGSJET interaction models and the hypothesis of the power-law steepening primary Energy Spectra. All presented results are derived taking into account the detector response, reconstruction uncertainties of EAS parameters and fluctuation of EAS development.
