Browsing by Author "Moldoveanu, V."

Now showing items 1-20 of 25

    • Analysis of the phase lapse problem in closed interferometers 

      Tolea, M.; Moldoveanu, V.; Dinu, I. V.; Tanatar, Bilal (Elsevier B.V., 2012)
      We investigate the connection between the asymmetry of the Fano resonances in a mesoscopic interferometer with an embedded quantum dot and the π lapses in the phase of the bare dot transmittance. Consecutive Fano resonances ...

    • Coherent and incoherent transport through T-shaped double quantum dots 

      Moldoveanu, V.; Ţolea, M.; Tanatar, Bilal (Elsevier B.V., 2008)
      We investigate the measurement induced dephasing of the Fano effect in the electronic transport through a double quantum dot mesoscopic interferometer coupled to a charge detector. The current and the differential conductance ...

    • Controlled dephasing in single-dot Aharonov-Bohm interferometers 

      Moldoveanu, V.; Ţolea, M.; Tanatar, Bilal (2007)
      We study the Fano effect and the visibility of the Aharonov-Bohm oscillations for a mesoscopic interferometer with an embedded quantum dot in the presence of a nearby second dot. When the electron-electron interaction ...

    • Coulomb drag effect in parallel quantum dots 

      Tanatar, Bilal; Moldoveanu, V. (American Institute of Physics, 2009)
      We study theoretically the electronic transport in parallel few-level quantum dots in the presence of both intradot and interdot long-range Coulomb interaction. Each dot is connected to two leads and the steady-state ...

    • Coulomb effects in open quantum dots within the random-phase approximation 

      Moldoveanu, V.; Tanatar, Bilal (The American Physical Society, 2008)
      The effect of electron-electron interactions on coherent transport in quantum dot systems is theoretically investigated by adapting the well-known random-phase approximation (RPA) to the nonequilibrium Green-Keldysh formalism ...

    • Dynamic correlation effects on the plasmon dispersion in a two-dimensional electron gas 

      Yurtsever, A.; Moldoveanu, V.; Tanatar, Bilal (The American Physical Society, 2003)
      The charge-density oscillations (plasmons) of a low-density two-dimensional uniform electron gas are studied within the framework of finite temperature and frequency dependent (dynamic) version of Singwi, Tosi, Land, and ...

    • Fano effect in a double T-shaped interferometer 

      Moldoveanu, V.; Dinu, I. V.; Tanatar, Bilal (Springer, 2009)
      We study the coherent transport in a one-dimensional lead with two side-coupled quantum dots using the Keldysh's Green function formalism.The effect of the interdot Coulomb interaction is taken into account by computing ...

    • Inelastic transitions and counterflow tunneling in double-dot quantum ratchets 

      Moldoveanu, V.; Tanatar, Bilal (The American Physical Society, 2010)
      The ratchet regime of unbiased double quantum dots driven out of equilibrium by an independently biased nearby detector has been theoretically studied using the nonequilibrium Keldysh formalism and the random-phase ...

    • Interaction and size effects in open nano-electromechanical systems 

      Tanatar, Bilal; Moldoveanu, V.; Dragomir, R.; Stanciu, S. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2019)
      The time‐dependent transport of a 2D quantum wire (QW) connected to source/drain leads and electrostatically coupled to a singly‐clamped InAs cantilever is investigated. The latter is placed above the nanowire and acts as ...

    • Light-hole exciton mixing and dynamics in Mn-doped quantum dots 

      Moldoveanu, V.; Dinu, I. V.; Dragomir, R.; Tanatar, Bilal (American Physical Society, 2016)
      We investigate theoretically the spectral and dynamical effects of the short-range exchange interaction between a single manganese (Mn) atom hosted by cylindrical CdTe quantum dots and its light-hole excitons or biexcitons. ...

    • Many-body effects in the Coulomb drag between low density electron layers 

      Yurtsever, A.; Moldoveanu, V.; Tanatar, Bilal (Elsevier Science, 2003)
      Recent Coulomb drag experiments in low-density double-layer electron systems have the power of distinguishing various many-body formulations of the effective interactions. In this work we theoretically study the correlation ...

    • Measurement-induced decoherence in electronic interferometry at nanoscale 

      Moldoveanu, V.; Tanatar, Bilal; Ţolea, M. (Elsevier B.V., 2008)
      We introduce a theoretical formalism describing a wide class of 'Which Path' experiments in mesoscopic/nanoscopic transport. The physical system involves a mesoscopic interferometer (e.g. an Aharonov-Bohm ring with embedded ...

    • Mesoscopic Fano effect in a spin splitter with a side-coupled quantum dot 

      Moldoveanu, V.; Tolea, M.; Tanatar, Bilal (Elsevier B.V., 2012)
      We investigate the interplay between the spin interference and the Fano effect in a three-lead mesoscopic ring with a side-coupled quantum dot (QD). A uniform Rashba spin-orbit coupling and a perpendicular magnetic field ...

    • Mesoscopic fano effect in Aharonov-Bohm rings with an embedded double dot 

      Tanatar, Bilal; Moldoveanu, V.; Tolea, M.; Aldea, A. (American Institute of Physics, 2006)
      We investigate theoretically in a tight-binding model the transport properties of the Aharonov-Bohm interferometer (ABI) with one dot embedded in each of its arms. For weak interdot coupling the model Hamiltonian describes ...

    • Mesoscopic Fano effect in an Aharonov-Bohm interferometer Coulomb-coupled to a nearby quantum dot 

      Tolea, M.; Moldoveanu, V.; Tanatar, Bilal (Wiley, 2007)
      Motivated by the pionieering experiments of Buks et al. [Nature 391, 871 (1998)] we investigate the visibility of the Fano effect in a single-dot Aharonov-Bohm interferometer which is Coulomb-coupled to a nearby quantum ...

    • Non-equilibrium transport and spin dynamics insingle-molecule magnets. 

      Moldoveanu, V.; Dinu, I. V.; Tanatar, Bilal (Academic Press, 2015)
      The time-dependent transport through single-molecule magnets (SMM) coupled to mag-netic or non-magnetic electrodes is studied in the framework of the generalized Masterequation (GME) method. We calculate the transient ...

    • Orbital magnetization of single and double quantum dots in a tight-binding model 

      Aldea, A.; Moldoveanu, V.; Niţǎ, M.; Manolescu, A.; Gudmundsson, V.; Tanatar, Bilal (American Physical Society, 2003)
      We calculate the orbital magnetization of single and double quantum dots coupled both by Coulomb interaction and by electron tunneling. The electronic states of the quantum dots are calculated in a tight-binding model, and ...

    • 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 ...

    • Resonant and coherent transport through Aharonov-Bohm interferometers with coupled quantum dots 

      Moldoveanu, V.; Ţolea, M.; Aldea, A.; Tanatar, Bilal (The American Physical Society, 2005)
      A detailed description of the tunneling processes within Aharonov-Bohm (AB) rings containing two-dimensional quantum dots is presented. We show that the electronic propagation through the interferometer is controlled by ...