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Physics

Recent Submissions

  • Oikonomou, Thomas; Bagci, G. Baris (Physics Letters A, 2017-01-30)
    Abstract It is well-known that the partition function can consistently be factorized from the canonical equilibrium distribution obtained through the maximization of the Shannon entropy. We show that such a normalized and ...
  • PAPADIMOPOULOS, ATHANASIOS N.; KANTARTZIS, NIKOLAOS V.; TSITSAS, NIKOLAOS L.; VALAGIANNOPOULOS, CONSTANTINOS A. (Optical Society of America, 2017-12-08)
    Color-selective absorption of light is a very significant operation used in numerous applications, from photonic sensing and switching to optical signal modulation and energy harnessing. We demonstrate angle-insensitive ...
  • Malafarina, Daniele (Universe, 2017-05-26)
    In the last four decades, different programs have been carried out aiming at understanding the final fate of gravitational collapse of massive bodies once some prescriptions for the behaviour of gravity in the strong field ...
  • Bambi, Cosimo; Malafarina, Daniele; Modesto, Leonardo (ArXiv, 2016-04-22)
    In a previous paper, we studied the interior solution of a collapsing body in a non-local theory of gravity super-renormalizable at the quantum level. We found that the classical singularity is replaced by a bounce, after ...
  • Yapiyev, Vadim; Sagintayev, Zhanay; Inglezakis, Vassilis J.; Samarkhanov, Kanat; Verhoef, Anne (Water, 2017-10-21)
    Endorheic basins (i.e., land-locked drainage networks) and their lakes can be highly sensitive to variations in climate and adverse anthropogenic activities, such as overexploitation of water resources. In this review ...
  • Ilyas, Batyr; Yang, Jinye; Malafarina, Daniele; Bambi, Cosimo (European Physical Journal C: Particles and Fields, 2017-07-11)
    We study the observational properties of a class of exact solutions of Einstein’s field equations describing stationary, axially symmetric, rigidly rotating dust (i.e. noninteracting particles).We ask the questionwhether ...
  • Good, Michael R.R.; Yelshibekova, Khalykbek; Chin Ong, Yen (ArXiv, 2017-03-03)
    A new solution of a unitary moving mirror is found to produce nite energy and emit thermal radiation despite the absence of an acceleration horizon. In the limit that the mirror approaches the speed of light, the model ...
  • 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 ...
  • Valagiannopoulos, Constantinos A; Mattheakis, Marios; Shirodkar, Sharmila N; Kaxiras, Efthimios (Journal of Physics Communications, 2017-11-08)
    Wave polarization contains valuable information for electromagnetic signal processing; thus, the ability to manipulate it, can be extremely useful in modeling photonic devices. In this work, we propose designs comprised ...
  • Ullrich, Bruno; Singh, Akhilesh K.; Bhowmick, Mithun; Barik, Puspendu; Ariza-Flores, David; Xi, Haowen; Tomm, Jens W. (American Institute of Physics, 2014)
    The merger of the absorption coefficient dispersion, retrieved from transmission by the modified Urbach rule introduced by Ullrich and Bouchenaki [Jpn. J. Appl. Phys. 30, L1285, 1991], with the extended Roosbroeck-Shockley ...
  • Rehberg, Mirko; Kirschstein, Timo; Guli, Xiati; Müller, Steffen; Rohde, Marco; Franz, Denise; Tokay, Tursonjan; Köhling, Rüdiger (Neural Plasticity, 2017-10-02)
    Spatial learning and associating spatial information with individual experience are crucial for rodents and higher mammals. Hence, studying the cellular and molecular cascades involved in the key mechanism of information ...
  • Abdullaev, A.; Muminov, B.; Rakhymzhanov, A.; Mynbayev, N.; Utegulov, Z. N. (American Institute of Physics, 2017-07-12)
    Nanosecond laser pulse-induced melting thresholds in refractory (Nb, Mo, Ta and W) metals are measured using detected laser-generated acoustic shear waves. Obtained melting threshold values were found to be scaled with ...
  • Boardman, A D; Alberucci, A; Assanto, G; Grimalsky, V V; Kibler, B; McNiff, J; Nefedov, I S; Rapoport, Yu G; Valagiannopoulos, C A (Nanotechnology, 2017-10-20)
    The topics here deal with some current progress in electromagnetic wave propagation in a family of substances known as metamaterials. To begin with, it is discussed how a pulse can develop a leading edge that steepens and ...
  • Tsitsas, N. L.; Valagiannopoulos, C. A. (IEEE, 2017)
    Obtaining anomalous reflection and transmission (namely propagation along directions different from those predicted by Snell’s law) is investigated for plane waves impinging on a planar periodic metasurface composed of two ...
  • Valagiannopoulos, Constantinos A.; Kovanis, Vassilios (PHYSICAL REVIEW A, 2017-06-06)
    In this paper, motivated by such trends in coupled optical oscillators and applied mathematics methods, we inject an inverse-design approach in the construction of the far field of multiple radiating optical apertures. ...
  • Batyrkhanov, Ayan (Nazarbayev University, School of Science and Technology, 2017)
    Nowadays, many particle detectors use liquid scintillator (LS) as a detection medium. In particular, Water-based Liquid Scintillator (WbLS) that is a new material currently under development. It is based on the idea of ...
  • Yessenov, Murat (Nazarbayev University, School of Science and Technology, 2017)
    Due to large variation of particle density in EAS, a response linearity of each detector needs to be assessed. The number of photon in a photo multiplier tube (PMT) pulse allows inferring the deviation from linearity in ...
  • Yegovtsev, Nikolay (Nazarbayev University, School of Science and Technology, 2017)
    The following work is a numerical study of a recently discovered Bose-Einstein condensation of magnons at room temperature by purely classical means. The classical Hamiltonian of the system includes exchange and dipolar ...
  • Zhaksylykov, Azamat (Nazarbayev University, School of Science and Technology, 2017)
    At the final stages of the lives of massive stars supernova explosion occurs. Before that process nuclear shell burning happens and strong turbulent convection arises in between iron core and silicon shell. Turbulence by ...
  • Duspayev, Alisher (Nazarbayev University, School of Science and Technology, 2017)
    A nature of Ultra-high energy Cosmic Ray is one of the remaining open topics in the field of High Energy Physics. The modern detector systems are being designed and constructed to study this phenomenon. "Horizon-T" that ...

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