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  • Gravitational blueshift from a collapsing object 
    Kong, Lingyao; Malafarina, D.; Bambi, Cosimo (2014-12-22)
    We discuss a counterintuitive phenomenon of classical general relativity, in which a significant fraction of the radiation emitted by a collapsing object and detected by a distant observer may be blueshifted rather than ...
  • Gravitational Collapse of Inhomogenous Perfect Fluid 
    Satin, Seema; Malafarina, D.; Joshi, Pankaj S. (2014)
    We study the complete gravitational collapse of a class of inhomogeneous perfect fluid models obtained by introducing small radial perturbations in an otherwise homogeneous matter cloud. The key feature that we assume for ...
  • Gravitational collapse with tangential pressure 
    Malafarina, D.; Joshi, Pankaj S. (2011-05-06)
    Using the general formalism for spherical gravitational collapse developed in [1], we investigate here the final fate of a spherical distribution of a matter cloud, where radial pressures vanish but tangential pressures ...
  • GRAVITY WITH SCALAR FIELD VISCOUS FLUID 
    Myrzakul, S R; Imankul, M; Arzimbetova, M; Myrzakul, T R (Journal of Physics: Conference Series, 2021)
    We focus on a viable teleparallel cosmological model with a scalar field in a flat Friedman-Robertson-Walker universe. The Lagrangian and equations of motion are obtained. The case of an inhomogeneous viscous dark energy ...
  • Ground-state energy and relativistic corrections for positronium hydride 
    Bubin, Sergiy; Varga, Kalman (2011)
    Variational calculations of the ground state of positronium hydride (HPs) are reported, including various expectation values, electron-positron annihilation rates, and leading relativistic corrections to the total and ...
  • Group theory, entropy and the third law of thermodynamics 
    Canturk, Bilal; Oikonomou, Thomas; Bagci, G. Baris (Annals of Physics, 2017-02-01)
    Abstract Curado et al. (2016) have recently studied the axiomatic structure and the universality of a three-parameter trace-form entropy inspired by the group-theoretical structure. In this work, we study the group-theoretical ...
  • Guessing the Texture of Magnetic Samples Assisted by Aharonov-Bohm Effect 
    Valagiannopoulos, Constantinos; Alu, A.; Dimakis, A.; Marengo, E. A. (IEEE, 2016)
    Aharonov-Bohm (AB) effect is a very significant phenomenon of quantum mechanics. It demonstrates the significance of electromagnetic potentials (proportional to fluxes) against the electromagnetic fields through the ...
  • Highly selective transmission and absorption from metasurfaces of periodically corrugated cylindrical particles 
    Tagay, Zhenisbek; Valagiannopoulos, Constantinos (Physical review B, 2018-09-25)
    Gratings of infinite wires make, perhaps, the simplest class of metasurfaces, which, however, are utilized for a variety of different objectives in wave manipulation. Importantly, due to their analytical solvability, ...
  • Horizon - T Experiment Calibrations - Cables 
    Beznosko, Dmitriy; Beremkulov, T.; Iakovlev, A.; Makhataeva, Z.; Vildanova, M.I.; Yelshibekov, K.; Zhukov, V.V. (arXiv.org, 2016)
    An innovative detector system called Horizon-T is constructed to study Extensive Air Showers (EAS) in the energy range above 1016 eV coming from a wide range of zenith angles (0o - 85o). The system is located at Tien Shan ...
  • Horizon-T Experiment Calibrations – MIP Signal from Scintillator and Glass Detectors 
    Beznosko, Dmitriy; Beremkulov, T.; Iakovlev, A.; Duspayev, A.; Vildanova, M. I.; Uakhitov, T.; Yelshibekov, K.; Yessenov, M.; Zhukov, V.V. (arXiv.org, 2017)
    Horizon-T, a modern Extensive Air Showers (EAS) detector system, is constructed at Tien Shan high-altitude Science Station of Lebedev Physical Institute of the Russian Academy of Sciences at approximately 3340 meters above ...
  • Horizon-T Experiment Status 
    Beznosko, Dmitriy; Beisembaev, Rashid; Baigarin, Kanat; Beisembaeva, Elena; Dalkarov, Oleg; Ryabov, Vladimi; Sadykov, Turlan; Shaulov, Sergei; Stepanov, Alekse; Vildanova, Marina; Vildanov, Nikolay; Zhukov, Valeriy (ISVHECRI 2016, 2016)
    Horizon-T is an innovative detector system constructed to study Extensive Air Showers (EAS) in the energy range above 1016 eV coming from a wide range of zenith angles (0o - 85o). The system is located at the Tien Shan ...
  • Horizon-T extensive air showers detector system operations and performance 
    Beznosko, Dmitriy; Batyrkhanov, А.; Beremkulov, Т.; Duspayev, A.; Iakovlev, A.; Makhataeva, Z.; Yelshibekov, K.; Yessenov, M.; Beisembaev, R.U.; Zhukov, V.V. (38th International Conference on High Energy Physics, 2016)
    “Horizon-T” is an innovative detector system located at Tien Shan high-altitude Science Station (TSHASS) at approximately 3340 meters above the sea level. It consists of eight detection points separated by the distance ...
  • The impact of vorticity waves on the shock dynamics in core-collapse supernovae 
    Huete, Cesar; Abdikamalov, Ernazar; Radice, David (Monthly Notices of the Royal Astronomical Society, 2018-04)
    Convective perturbations arising from nuclear shell burning can play an important role in propelling neutrino-driven core-collapse supernova explosions. In this work, we analyse the impact of vorticity waves on the shock ...
  • Improved calculations of the lowest vibrational transitions in HeH+ 
    Bubin, Sergiy; Stanke, Monika; Ke¸dziera, Dariusz; Adamowicz, Ludwik (2007)
    More accurate variational calculations of the lowest three pure vibrational states v=0,1,2 of the 4HeH+ molecular ion have been carried out without assuming the Born-Oppenheimer approximation. In the calculations we ...
  • Indication of Electron Neutrino Appearance from an Accelerator-produced Off-axis Muon Neutrino Beam 
    Beznosko, Dmitriy (2011)
    The T2K experiment observes indications of ! e appearance in data accumulated with 1:43 1020 protons on target. Six events pass all selection criteria at the far detector. In a three- avor neutrino oscillation ...
  • Inherent photoluminescence Stokes shift in GaAs 
    Ullrich, Bruno; Singh, Akhilesh K.; Barik, Puspendu; Xi, Haowen; Bhowmick, Mithun (Optics letters, 2015-06-01)
    The intrinsic photoluminescence Stokes shift, i.e., the energy difference between optical band gap and emission peak, of 350 μm thick semi-insulating GaAs wafers is found to be 4 meV at room temperature. The result is based ...
  • In situ laser-based resonant ultrasound measurements of microstructure mediated mechanical property evolution 
    Hurley, D. H.; Reese, S. J.; Park, S. K.; Utegulov, Z.N.; Kennedy, J. R.; Telschow, K. L. (2010)
    In situ laser-based resonant ultrasound spectroscopy is used to characterize the development of a recrystallized microstructure in a high purity copper sample. The modal shapes, used for mode identification, of several ...
  • Instability of black hole formation under small pressure perturbations 
    Joshi, Pankaj S.; Malafarina, D. (2012-11-14)
    We investigate here the spectrum of gravitational collapse endstates when arbitrarily small perfect fluid pressures are introduced in the classic black hole formation scenario as described by Oppenheimer, Snyder and Datt ...
  • Instability of tripositronium 
    Bubin, Sergiy; Prezhdo, Oleg V., K´alm´an Varga (2013)
    The stability of tripositronium, a system consisting of three electrons and three positrons, has been investigated systematically by varying the repulsion strength between like-charged particles. The possibility of the ...
  • Interaction of electromagnetic fields and atomic clusters 
    Bubin, Sergiy; Russakoff, A.G.; Varga, K. (2013)
    In the framework of real-time real-space time-dependent density functional theory complemented with Ehrenfest molecular dynamics we have studied the response of nanostructures to intense femtosecond laser pulses. Examples ...