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  • Scalar field collapse and cosmic censorship 
    Goswami, Rituparno; Joshi, Pankaj S.; Malafarina, D. (2012-02-28)
    We analyze here the final fate of complete gravitational collapse of a massless scalar field within general relativity. A class of dynamical solutions with initial data close to the Friedmann-Lemaˆıtre-Robertson-Walker ...
  • Scattering properties of PT- symmetric layered periodic structures 
    Shramkova, O. V.; Tsironis, G. P. (Journal of Optics (United Kingdom), 2016-10-01)
    The optical properties of PT-symmetric periodic stacks of the layers with balanced loss and gain are examined. We demonstrate that the tunnelling phenomenon in periodic structures is connected with excitation of surface ...
  • Self-induced transparency of the optical phonons 
    Mandilara, Aikaterini; Ivić, Zoran; Čevizović, Dalibor; Pržulj, Željko (Chaos, Solitons & Fractals, 2017-12-01)
    Abstract We show that the self-induced transparency of optical phonons may appear in a systems consisting of a two level atoms interacting with elastic waves. The presence of the gap in phonon spectrum substantially enhances ...
  • Shock-turbulence interaction in core-collapse supernovae 
    Abdikamalov, Ernazar; Zhaksylykov, Azamat; Radice, David; Berdibek, Shapagat (Monthly Notices of the Royal Astronomical Society, 2016-10-01)
    Nuclear shell burning in the final stages of the lives of massive stars is accompanied by strong turbulent convection. The resulting fluctuations aid supernova explosion by amplifying the non-radial flow in the post-shock ...
  • Signatures of Energy Flux in Particle Production: A Black Hole Birth Cry and Death Gasp 
    Good, Michael R.R.; Ong, Yen Chin (2015)
    It is recently argued that if the Hawking radiation process is unitary, then a black hole's mass cannot be monotonically decreasing. We examine the time dependent particle count and negative energy flux in the non-trivial ...
  • Simulation and design of the HT-KZ Ultra-high energy cosmic rays detector system for cosmic rays with energies above 1017 eV 
    Duspayev, А.; Beremkulov, Т.; Beznosko, Dmitriy; Iakovlev, A.; Yelshibekov, K.; Yessenov, М.; Beisembaev, R.U.; Zhukov, V.V. (38th International Conference on High Energy Physics, 2016)
    In the field of High Energy Physics today there are several open topics left. The Higgs boson has been recently discovered, neutrino oscillations are being studied, and some hints of the dark matter have been detected ...
  • Singlet–triplet energy splitting between 1D and 3D (1s22snd), n=3, 4, 5, and 6, Rydberg states of the beryllium atom (9Be) calculated with all-electron explicitly correlated Gaussian functions 
    Sharkey, Keeper L.; Bubin, Sergiy; Adamowicz, Ludwik (Chemical Physics Letters, 2014-11-25)
    Abstract Accurate variational nonrelativistic quantum-mechanical calculations are performed for the five lowest 1D and four lowest 3D states of the 9Be isotope of the beryllium atom. All-electron explicitly correlated ...
  • Singularity avoidance in classical gravity from four-fermion interaction 
    Bambi, Cosimo; Malafarina, D.; Marcian`o, Antonino; Modesto, Leonardo (2014-05-26)
    We derive the dynamics of the gravitational collapse of a homogeneous and spherically symmetric cloud in a classical set-up endowed with a topological sector of gravity and a non-minimal coupling to fermions. The effective ...
  • Singularity avoidance in quantum-inspired inhomogeneous dust collapse 
    Liu, Yue; Malafarina, D.; Modesto, Leonardo; Bambi, Cosimo (2014-08-17)
    In a previous paper, some of us studied general relativistic homogeneous gravitational collapses for dust and radiation, in which the density profile was replaced by an effective density justified by some quantum gravity ...
  • Size effects in near-ultraviolet Raman spectra of few-nanometer-thick silicon-oninsulator nanofilms 
    Poborchii, Vladimir; Morita, Yukinori; Tada, Tetsuya; Geshev, Pavel I.; Utegulov, Zhandos; Volkov, Alexey (Journal of Applied Physics, 2016-04)
    We have fabricated Si-on-insulator (SOI) layers with a thickness h1 of a few nanometers and examined them by Raman spectroscopy with 363.8 nm excitation. We have found that phonon and electron confinement play important ...
  • Stochastic metastability by spontaneous localisation 
    Oikonomou, Th.; Nergis, A.; Lazarides, N.; Tsironis, G.P. (Chaos, Solitons & Fractals, 2014-12-01)
    Abstract Nonequilibrium, quasi-stationary states of a one-dimensional “hard” ϕ4 deterministic lattice, initially thermalised to a particular temperature, are investigated when brought into contact with a stochastic thermal ...
  • Strong laser-pulse-driven ionization and Coulomb explosion of hydrocarbon molecules 
    Bubin, Sergiy; Atkinson, Mackenzie; Varga, Kalman (2012)
    Field ionization and Coulomb explosion of small hydrocarbon molecules driven by intense laser pulses are studied in a combined theoretical and experimental framework. The spectra of ejected protons calculated by the ...
  • Study of the resonance α+13C interaction at low energies: Optimization of parameters of the beam shape 
    Yesenov, M.; Beznosko, Dmitriy; Duspayev, A.; Iakovlev, A. (International Conference on New Photo-detectors, 2015)
    About half of all elements heavier than iron are produced in a stellar environment through the s process, which involves a series of subsequent neutron captures and α decays. The reaction 13C(α,n)16O is considered to be ...
  • Technical manual: a survey of scintillating medium for high-energy particle detection 
    Baitenov, Adil; Iakovlev, Alexander; Beznosko, Dmitriy (2016)
    There are various particle detection methods used nowadays and the most common is using scintillators. Among scintillating materials, solid plastic and water-based liquid scintillators (WbLS) are the latest development. ...
  • Terminating black holes in asymptotically free quantum gravity 
    Bambi, Cosimo; Malafarina, D.; Modesto, Leonardo (2014-02-03)
    We study the homogeneous gravitational collapse of a spherical cloud of matter in a super-renormalizable and asymptotically free theory of gravity. We nd a picture that di ers substantially from the classical scenario. ...
  • The general solution for relativistic spherical shells 
    Kijowski, J.; Magli, G.; Malafarina, D. (2005)
    The general exact solution of the Einstein-matter field equations describing spherically symmetric shells satisfying an equation of state in closed form is discussed under general assumptions of physical reasonableness. ...
  • The “Horizon-T” Experiment: Extensive Air Showers Detection 
    Beisembaev, R . U .; Beisembaeva, E.A.; Dalkarov, O.D.; Ryabov, V.A.; Stepanov, A.V.; Vildanov, N.G.; Vildanova, M.I.; Zhukov, V.V.; Baigarin, K.A.; Beznosko, Dmitriy; Sadykov, T.X.; Suleymenov, N.S (arXiv.org, 2016)
    Horizon - T is a n innovative detector system constructed to study Extensive Air Showers (EAS) in the energy range above 10 16 eV coming from a wide range of zenith angles (0 o - 85 o ). The system ...
  • The instability of black hole formation in gravitational collapse 
    Joshi, Pankaj S.; Malafarina, D. (2011-01-11)
    We consider here the classic scenario given by Oppenheimer, Snyder, and Datt, for the gravitational collapse of a massive matter cloud, and examine its stability under the introduction of small tangential stresses. We show, ...
  • Theoretical concepts of unlimited-power reflectors, absorbers, and emitters with conjugately matched layers 
    Valagiannopoulos, Constantinos; Tretyakov, Sergei A. (American Physical Society, 2016-09-12)
    Recently, it was shown that by using special artificial materials it is possible to ensure that all electromagnetic modes of free space are conjugately matched to the modes of a material body and, thus, all modes deliver ...
  • Theory and application of explicitly correlated Gaussians 
    Mitroy, Jim; Bubin, Sergiy; Horiuchi, Wataru; Suzuki, Yasuyuki; Adamowicz, Ludwik; Cencek, Wojciech; Szalewicz, Krzysztof; Komasa, Jacek; Blume, D.; Varga, Ka´lma´n (2013)
    The variational method complemented with the use of explicitly correlated Gaussian basis functions is one of the most powerful approaches currently used for calculating the properties of few-body systems. Despite its ...