Now showing items 10937-10956 of 14803

    • Quantum quench in two dimensions using the variational Baeriswyl wave function 

      Dóra, B.; Haque, M.; Pollmann, F.; Hetényi, B. (American Physical Society, 2016)
      By combining the Baeriswyl wave function with equilibrium and time-dependent variational principles, we develop a nonequilibrium formalism to study quantum quenches for two-dimensional spinless fermions with nearest-neighbor ...
    • Quantum size effect on the phonon-induced Zeeman splitting in a GaAs quantum dot with Gaussian and parabolic confining potentials 

      Mukhopadhyaya, S.; Boyacioglu, B.; Saglam, M.; Chatterjee, A. (Elsevier B.V., 2008)
      The Zeeman splitting of the ground and the first excited level of a Gaussian GaAs quantum dot is studied in the presence of electron-longitudinal-optical (LO)-phonon interaction incorporating the spin of the electron and ...
    • Quantum stereographic projection and the homographic oscillator 

      Hakioǧlu T.; Arik, M. (American Physical Society, 1996)
      The quantum deformation created by the stenographic mapping from S2 to C is studied. It is shown that the resulting algebra is locally isomorphic to su(2) and is an unconventional deformation of which the undeformed limit ...
    • Quantum transport through one-dimensional aluminum wires 

      Batra, I. P.; Sen, P.; Çıracı, Salim (American Vacuum Society, 2002)
      Quantum conductance in narrow channels has been well understood by using the two-dimensional electron gas, a model system which has been realized in semiconductor heterojunctions. An essential property of this electron ...
    • Quantum turnstile operation of single-molecule magnets 

      Moldoveanu, V.; Dinu, I. V.; Tanatar, Bilal; Moca, C. P. (Institute of Physics Publishing, 2015)
      The time-dependent transport through single-molecule magnets coupled to magnetic or non-magnetic electrodes is studied in the framework of the generalized master equation method. We investigate the transient regime induced ...
    • Quantum turnstile regime of nanoelectromechanical systems 

      Dragomir, R.; Moldoveanu, V.; Stanciu, S.; Tanatar, Bilal (American Physical Society, 2020)
      The effects of a turnstile operation on the current-induced vibron dynamics in nanoelectromechanical systems (NEMS) are analyzed in the framework of the generalized master equation. In our simulations each turnstile cycle ...
    • Quantum Zeno Suppression of Intramolecular Forces 

      Wüster, S. (American Physical Society, 2017)
      We show that Born-Oppenheimer surfaces can intrinsically decohere, implying loss of coherence among constituent electronic basis states. We consider the example of interatomic forces due to resonant dipole-dipole interactions ...
    • Quantum-statistical properties of a Raman-type model 

      Shumovsky, A. S.; Tanatar, Bilal (American Physical Society, 1993)
      A model describing three boson fields with the decay of Rayleigh mode into the Stokes and vibration (phonon) modes is examined. The problem of exact eigenvalues and eigenstates is reduced to the calculation of zeros of new ...
    • Quarter wave Fresnel rhomb with colinear output beam 

      Serpenguzel, A. (Optical Society of America Inc., Washington, DC, United States, 1999)
      A standard quarter wave (λ/4) Fresnel rhomb laterally displaces the output beam with respect to the input beam. This lateral displacement can cause problems when inserting the rhomb in an already aligned optical setup. ...
    • Quasi lumpability, lower-bounding coupling matrices, and nearly completely decomposable Markov chains 

      Dayar T.; Stewart, W. J. (SIAM, 1997)
      In this paper, it is shown that nearly completely decomposable (NCD) Markov chains are quasi-lumpable. The state space partition is the natural one, and the technique may be used to compute lower and upper bounds on the ...
    • Quasi-birth-and-death processes with level-geometric distribution 

      Dayar T.; Quessette, F. (SIAM, 2003)
      A special class of homogeneous continuous-time quasi-birth-and-death (QBD) Markov chains (MCS) which possess level-geometric (LG) stationary distribution is considered. Assuming that the stationary vector is partitioned ...
    • The quasi-equivalence problem for a class of köthe spaces 

      Arslan, B.; Kocatepe, M. (1997)
      We consider a subclass of the class of stable nuclear Fréchet-Köthe spaces, and show that quasi-equivalence property holds in this subclass.
    • Quasi-particle properties in a quasi-two-dimensional electron liquid 

      Asgari, R.; Tanatar, Bilal (Indian Academy of Sciences, 2008)
      We consider the quasi-particle properties such as the effective mass and spin susceptibility of quasi-two-dimensional electron systems. The finite quantum well width effects are incorporated into the local-field factors ...
    • Quasi-particle properties of a one-dimensional electron system interacting with a short-range potential 

      Tanatar, Bilal; Demirel, E. (Wiley, 2000)
      We study the quasi-particle properties of a one-dimensional electron gas interacting via a short-range electron-electron interaction. The electron self-energy is calculated using the leading-order dynamical-screening ...
    • Quasi-two-dimensional Feynman bipolarons 

      Senger, R. T.; Erçelebi, A. (American Physical Society, 1999)
      We study the stability criterion for the formation of two-dimensionally confined large bipolarons. The electrons are treated as bounded within a parabolic potential well while being coupled to one another via the Fröhlich ...
    • Quasilinear actions on products of spheres 

      Ünlü O.; Yalçın, E. (Wiley-Blackwell Publishing Ltd., 2010)
      For some small values of f, we prove that if G is a group having a complex (real) representation with fixity f, then it acts freely and smoothly on a product of f+1 spheres with trivial action on homology. © 2010 London ...
    • Quasimetallic silicon micromachined photonic crystals 

      Temelkuran, B.; Bayındır, Mehmet; Özbay, Ekmel; Kavanaugh, J. P.; Sigalas, M. M.; Tuttle, G. (American Institute of Physics, 2001)
      We report on fabrication of a layer-by-layer photonic crystal using highly doped silicon wafers processed by semiconductor micromachining techniques. The crystals, built using (100) silicon wafers, resulted in an upper ...
    • Quaternionic Hilbert spaces and a von Neumann inequality 

      Alpay, D.; Kaptanoğlu, H. T. (Taylor & Francis, 2012)
      We show that Drury's proof of the generalisation of the von Neumann inequality to the case of contractive rows of N-tuples of commuting operators still holds in the quaternionic case. The arguments require a seemingly new ...
    • Queerly Turkish: queer masculinity and national belonging in the image of Zeki Müren 

      Hawkins, S. (Routledge, 2018)
      This article offers an explanation for the lasting appeal of Turkish cross-dressing singer Zeki Müren (1931–96). His performances on stage, film, and television interweave avant-garde, modern, and old-fashioned elements. ...
    • Quel devenir après la laryngectomie totale pour carcinome épidermoïde? Résultats d'un centre 

      Leong, S.C.; Kartha, S.-S.; Kathan, C.; Sharp J.; Mortimore, S. (2012)
      [No abstract available]