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Просмотр Articles по названию

Отображаемые элементы 143-162 из 213

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 ...
Power law exponents characterizing human DNA

Provata, A.; Oikonomou, Th. (2007)

The size distributions of all known coding and noncoding DNA sequences are studied in all human chromosomes. In a unified approach, both introns and intergenic regions are treated as noncoding regions. The distributions ...
Prediction of 1P Rydberg energy levels of beryllium based on calculations with explicitly correlated Gaussians

Bubin, Sergiy; Adamowicz, Ludwik (2014)

Benchmark variational calculations are performed for the seven lowest 1s22s np (1P), n = 2. . . 8, states of the beryllium atom. The calculations explicitly include the effect of finite mass of 9Be nucleus and account ...
Prediction of 2D Rydberg energy levels of 6Li and 7Li based on very accurate quantum mechanical calculations performed with explicitly correlated Gaussian functions

Bubin, Sergiy; Sharkey, Keeper L.; Adamowicz, Ludwik (2013)

Very accurate variational nonrelativistic finite-nuclear-mass calculations employing all-electron explicitly correlated Gaussian basis functions are carried out for six Rydberg 2D states (1s2nd, n= 6, . . . , 11) of the ...
Prediction of 2S Rydberg energy levels of 6Li and 7Li based on quantum-mechanical calculations performed with explicitly correlated Gaussian functions

Bubin, Sergiy; Adamowicz, Ludwik (2013)

Accurate variational quantum-mechanical calculations are performed for the nine lowest 2S (1s2ns), n = 2, . . . ,10 states of the lithium atom. The effect of the finite nuclear mass is explicitly included in the ...
PT-Symmetric planar devices for field transformation and imaging

Valagiannopoulos, Constantinos; Monticone, F.; Alù, A. (2016)

The powerful tools of transformation optics (TO) allow an effective distortion of a region of space by carefully engineering the material inhomogeneity and anisotropy, and have been successfully applied in recent years ...
Quality Control Studies of Wavelength Shifting Fibers for a Scintillator- based Tail-Catcher Muon-Tracker Linear Collider Prototype Detector

Dyshkant, A.; Beznosko, Dmitriy; Blazey, G.; Rykalin, V.; Zutshi, V. (2006)

Detailed measurements of the wavelength shifting fiber response to a stable and reliable light source are presented. Details about materials, a double reference method, and measurement technique are included. The fibers ...
Quantum entanglement via nilpotent polynomials

Mandilara, Aikaterini; Akulin, Vladimir M.; Smilga, Andrei V.; Viola, Lorenza (2006)

We propose a general method for introducing extensive characteristics of quantum entanglement. The method relies on polynomials of nilpotent raising operators that create entangled states acting on a reference vacuum ...
Quantum uncertainty relation saturated by the eigenstates of the harmonic oscillator

Mandilara, Aikaterini; Cerf, N. J. (2012)

We rederive the Schr¨odinger-Robertson uncertainty principle for the position and momentum of a quantum particle. Our derivation does not directly employ commutation relations, but works by reduction to an eigenvalue problem ...
Qubit lattice coherence induced by electromagnetic pulses in superconducting metamaterials

Ivić, Z.; Lazarides, N.; Tsironis, G.P. (Nature Research, 2016)

Quantum bits (qubits) are at the heart of quantum information processing schemes. Currently, solid-state qubits, and in particular the superconducting ones, seem to satisfy the requirements for being the building blocks ...