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Fletta eftir höfundi "Gudmundsson, Vidar"

Fletta eftir höfundi "Gudmundsson, Vidar"

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    Coexisting spin and Rabi oscillations at intermediate time regimes in electron transport through a photon cavity 
    Gudmundsson, Vidar; Gestsson, Hallmann; Abdullah, Nzar; Tang, Chi-Shung; Manolescu, Andrei; Moldoveanu, Valeriu (2019-03-01)
    In this work, we theoretically model the time-dependent transport through an asymmetric double quantum dot etched in a two-dimensional wire embedded in a far-infrared (FIR) photon cavity. For the transient and the intermediate time regimes, the current ...
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    Conductance oscillations of core-shell nanowires in transversal magnetic fields 
    Gudmundsson, Vidar; Manolescu, Andrei; Nemnes, George Alexandru; Sitek, Anna; Erlingsson, Sigurður Ingi; Rosdahl, Tómas (American Physical Society (APS), 2016-05-31)
    We analyze theoretically electronic transport through a core-shell nanowire in the presence of a transversal magnetic field. We calculate the conductance for a variable coupling between the nanowire and the attached leads and show how the snaking ...
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    Excitons in core-shell nanowires with polygonal cross sections 
    Sitek, Anna; Urbaneja Torres, Miguel; Torfason, Kristinn; Gudmundsson, Vidar; Bertoni, Andrea; Manolescu, Andrei (American Chemical Society, 2018-04-21)
    The distinctive prismatic geometry of semiconductor core-shell nanowires leads to complex localization patterns of carriers. Here, we describe the formation of optically active in-gap excitonic states induced by the interplay between localization of ...
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    Generalized Master Equation Approach toTime-Dependent Many-Body Transport 
    Moldoveanu, Valeriu; Manolescu, Andrei; Gudmundsson, Vidar (MDPI AG, 2019-07-25)
    We recall theoretical studies on transient transport through interacting mesoscopic systems. It is shown that a generalized master equation (GME) written and solved in terms of many-body states provides the suitable formal framework to capture both the ...
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    In-gap corner states in core-shell polygonal quantum rings 
    Sitek, Anna; Ţolea, Mugurel; Niţă, Marian; Serra, Llorenç; Gudmundsson, Vidar; Manolescu, Andrei (Springer Nature, 2017-01-10)
    We study Coulomb interacting electrons confined in polygonal quantum rings. We focus on the interplay of localization at the polygon corners and Coulomb repulsion. Remarkably, the Coulomb repulsion allows the formation of in-gap states, i.e., ...
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    The photocurrent generated by photon replica states of an off-resonantly coupled dot-cavity system 
    Abdullah, Nzar; Tang, Chi-Shung; Manolescu, Andrei; Gudmundsson, Vidar (Springer Science and Business Media LLC, 2019-10-11)
    Transport properties of a quantum dot coupled to a photon cavity are investigated using a quantum master equation in the steady-state regime. In the off-resonance regime, when the photon energy is smaller than the energy spacing between the lowest ...
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    Thermoelectric Inversion in a Resonant Quantum Dot-Cavity System in the Steady-State Regime 
    Abdullah, Nzar; Tang, Chi-Shung; Manolescu, Andrei; Gudmundsson, Vidar (MDPI AG, 2019-05-14)
    We theoretically investigate thermoelectric effects in a quantum dot system under the influence of a linearly polarized photon field confined to a 3D cavity. A temperature gradient is applied to the system via two electron reservoirs that are connected ...