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  • Non-Born–Oppenheimer variational calculations of HT+ bound states with zero angular momentum 
    Bednarz, Eugeniusz; Bubin, Sergiy; Adamowicz, Ludwik (2005)
    We report fully nonadiabatic calculations of all rotationless bound states of HT+ molecular ion st+p+e−d carried out in the framework of the variational method. We show that, in all the states, except the two highest ones, ...
  • Nonlinear waves in hyperbolic metamaterials: focus on solitons and rogues 
    Boardman, A.D.; Grimalsky, V.V.; Guo, T.; Kibler, B.; McNiff, J.; Nefedov, I.; Rapoport, Y.; Argyropoulos, C.; Valagiannopoulos, Constantinos (Nazarbayev University School of Science and Technology, 2018-05-07)
    The investigation of hyperbolic metamaterials, shows that metal layers that are part of graphene structures, and also types I and II layered systems, are readily controlled. Since graphene is a nicely conducting sheet it ...
  • Nonrelativistic molecular quantum mechanics without approximations: Electron affinities of LiH and LiD 
    Bubin, Sergiy; Adamowicz, Ludwik (2004)
    We took the complete nonrelativistic Hamiltonians for the LiH and LiH2 systems, as well as their deuterated isotopomers, we separated the kinetic energy of the center of mass motion from the Hamiltonians, and with the use ...
  • Nonrelativistic variational calculations of the positronium molecule and the positronium hydride 
    Bubin, Sergiy; Adamowicz, Ludwik (2006)
    Highly accurate ground-state nonrelativistic variational calculations of Ps2, 1HPs, and HPs are reported. The calculations have been performed using 5000 explicitly correlated Gaussian basis functions and yielded the ...
  • Non-singular quantum-inspired gravitational collapse 
    Bambi, Cosimo; Malafarina, D.; Modesto, Leonardo (2013-08-07)
    We consider general relativistic homogeneous gravitational collapses for dust and radiation. We show that replacing the density profile with an effective density justified by some quantum gravity framework leads to the ...
  • Note on the effect of a massive accretion disk in the measurements of black hole spins 
    Bambi, Cosimo; Malafarina, D.; Tsukamoto, Naoki (2014-06-25)
    The spin measurement of black holes has important implications in physics and astrophysics. Regardless of the specific technique to estimate the black hole spin, all the current approaches assume that the space-time geometry ...
  • Novel Multi-pixel Silicon Photon Detectors and Applications in T2K 
    Beznosko, Dmitriy (2009)
    Nowadays, numerous fields such as High Energy Physics (HEP), medical imaging devices, portable radiation detectors etc., require a robust, miniature, reliable and readily available photon detector that is stable in ...
  • Observational properties of rigidly rotating dust configurations 
    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 ...
  • On horizonless temperature with an accelerating mirror 
    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 ...
  • On Spin-Statistics and Bogoliubov Transformations in Flat Spacetime With Acceleration Conditions 
    Good, Michael R.R. (2013-02-01)
    A single real scalar field of spin zero obeying the Klein-Gordon equation in flat spacetime under external conditions is considered in the context of the spin-statistics connection. An imposed accelerated boundary on the ...
  • Optical PT-Symmetric Counterparts of Ordinary Metals 
    Valagiannopoulos, Constantinos (IEEE Journal of Selected Topics in Quantum Electronics, 2015)
    How one can fabricate the Parity-Time (PT) symmetric siblings of commonly used metals in the visible? This work tries to give an answer to that question by providing the features of the active media which conjugately ...
  • Optimization of Arrays of Gold Nanodisks for Plasmon-Mediated Brillouin Light Scattering 
    Johnson, W. L.; Kim, S. A.; Utegulov, Z. N.; Shaw, J. M.; Draine, B. T. (2009)
    Distributions of electric fields in two-dimensional arrays of gold nanodisks on a Si3N4 membrane, with light incident through the membrane, are modeled with the aim of determining array geometries for effective plasmon-mediated ...
  • Optimization of the Liquid Scintillator Composition 
    Batyrkhanov, А.; Beznosko, Dmitriy; Yelshibekov, K.; Iakovlev, A. (38th International Conference on High Energy Physics, 2016)
    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 ...
  • Optimized Operation of Photonic Devices With Use of Ordinary Bulk Materials 
    Valagiannopoulos, Constantinos (Metamaterials, 2018)
    Structural boundaries, materials and feeding sources are the three fundamental segments defining photonic devices. Since excitation is usually dictated by the application and there are infinite ways to select the spatial ...
  • Orbit-orbit relativistic corrections to the pure vibrational non-Born-Oppenheimer energies of H2 
    Stanke, Monika; Kedziera, Dariusz; Bubin, Sergiy; Molski, Marcin; Adamowicz, Ludwik (2008)
    We report the derivation of the orbit-orbit relativistic correction for calculating pure vibrational states of diatomic molecular systems with electrons within the framework that does not assume the Born-Oppenheimer ...
  • Parity-Time Symmetric Nonlocal Metasurfaces: All-Angle Negative Refraction and Volumetric Imaging 
    Monticone, Francesco; Valagiannopoulos, Constantinos; Alù, Andrea (American Physical Society. Physical Review X, 2016)
    Lens design for focusing and imaging has been optimized through centuries of developments; however, conventional lenses, even in their most ideal realizations, still suffer from fundamental limitations, such as limits ...
  • Performance of Water-Based Liquid Scintillator: An Independent Analysis 
    Beznosko, Dmitriy; Batyrkhanov, A.; Duspayev, A.; Iakovlev, A.; Yessenov, M. (2014)
    The water-based liquid scintillator (WbLS) is a new material currently under development. It is based on the idea of dissolving the organic scintillator in water using special surfactants. This material strives to achieve ...
  • Photoluminescence lineshape of ZnO 
    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 ...
  • Photonic crystals for optimal color conversion in light-emitting diodes: a semi-analytical approach 
    Valagiannopoulos, Constantinos; Lagoudakis, Pavlos G. (Nazarbayev University School of Science and Technology, 2018-04-13)
    Based on effective-medium approximation, we analytically optimize the color conversion of GaN-based light-emitting p–n junctions, with respect to the size and spatial density of the used photonic crystals (PhCs), being ...
  • Photonic Inverse Design of Simple Particles with Realistic Losses in the Visible Frequency Range † 
    Valagiannopoulos, Constantinos (MDPI, 2019-02-28)
    Billions of U.S. dollars of basic and applied research funding have been invested during the last few years in ideas proposing inverse concepts. The photonics market could not make an exception to this global trend, and ...