48 citations · 478 across the 42 of their papers we have counts for
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Driven square lattice of quantum dots in a magnetic field coupled to a cylindrical FIR-photon cavity
Vidar Gudmundsson, Vram Mughnetsyan, Hsi-Sheng Goan +6
We present a comprehensive computational study of driven quantum dot arrays in a square lattice configuration, subject to an external magnetic field and coupled to a cylindrical fa…
Signatures of broken symmetries in the excitations of a periodic 2DEG coupled to a cylindrical photon cavity
Vidar Gudmundsson, Vram Mughnetsyan, Hsi-Sheng Goan +6
In a two-dimensional electron gas (2DEG) in a periodic lateral superlattice subjected to an external homogeneous magnetic field and in a cylindrical far-infrared photon cavity we s…
Spin-phase transition in an array of quantum rings controlled by cavity photons
Vidar Gudmundsson, Vram Mughnetsyan, Hsi-Sheng Goan +5
We model a spin-phase transition in a two-dimensional square array, or a lateral superlattice, of quantum rings in an external perpendicular homogeneous magnetic field. The electro…
The tuning of para- and diamagnetic cavity photon excitations in a square array of quantum dots in a magnetic field
Vidar Gudmundsson, Vram Mughnetsyan, Hsi-Sheng Goan +5
We employ a ``real-time'' excitation scheme to calculate the excitation spectra of a two-dimensional electron system in a square array of quantum dots placed in a circular cylindri…
Magneto-optical properties of a quantum dot array interacting with a far-infrared photon mode of a cylindrical cavity
Vidar Gudmundsson, Vram Mughnetsyan, Hsi-Sheng Goan +5
We model the equilibrium properties of a two-dimensional electron gas in a square lateral superlattice of quantum dots in a GaAs heterostructure subject to an external homogeneous…
Magnetic properties of a cavity-embedded square lattice of quantum dots or antidots
Vram Mughnetsyan, Vidar Gudmundsson, Nzar Rauf Abdullah +3
We apply quantum electrodynamical density functional theory to obtain the electronic density, the spin polarization, as well as the orbital and the spin magnetization of square per…
Controlling the excitation spectrum of a quantum dot array with a photon cavity
Vidar Gudmundsson, Vram Mughnetsyan, Nzar Rauf Abdullah +3
We use a recently proposed quantum electrodynamical density functional theory (QEDFT) functional in a real-time excitation calculation for a two-dimensional electron gas in a squar…
The effects of a far-infrared photon cavity field on the magnetization of a square quantum dot array
Vidar Gudmundsson, Vram Mughnetsyan, Nzar Rauf Abdullah +3
The orbital and spin magnetization of a cavity-embedded quantum dot array defined in a GaAs heterostructure are calculated within quantum-electrodynamical density-functional theory…
Unified approach to cyclotron and plasmon resonances in a periodic 2DEG hosting the Hofstadter butterfly
Vidar Gudmundsson, Vram Mughnetsyan, Nzar Rauf Abdullah +3
We present theoretical calculations for the cyclotron resonance and various magnetoplasmon modes of a Coulomb interacting two-dimensional GaAs electron gas (2DEG) modulated as a la…
Effective Hamiltonians in the Quantum Rabi Problem
P. Gartner, V. Moldoveanu
We revisit the theoretical description of the ultrastrong light-matter interaction in terms of exactly solvable effective Hamiltonians. A perturbative approach based on polaronic a…
Quantum turnstile regime of nanoelectromechanical systems
R. Dragomir, V. Moldoveanu, S. Stanciu +1
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…
Self-induction and magnetic effects in electron transport through a photon cavity
Vidar Gudmundsson, Nzar Rauf Abdullah, Chi-Shung Tang +2
We explore higher order dynamical effects in the transport through a two-dimensional nanoscale electron system embedded in a three-dimensional far-infrared photon cavity. The nanos…
Back-action effects in cavity-coupled quantum conductors
Valeriu Moldoveanu, Ion Viorel Dinu, Andrei Manolescu +1
We study the electronic transport through a pair of distant nanosystems ( and ) embedded in a single-mode cavity. Each system is connected to source and drain particle re…
Generalized Master Equation Approach to Time-Dependent Many-Body Transport
Valeriu Moldoveanu, Andrei Manolescu, Vidar Gudmundsson
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 man…
Cavity-photon induced high order transitions between ground states of quantum dots
Vidar Gudmundsson, Nzar Rauf Abdullah, Chi-Shung Tang +2
We show that quantum electromagnetic transitions to high orders are essential to describe the time-dependent path of a nanoscale electron system in a Coulomb blockage regime when c…
Coexisting spin and Rabi-oscillations at intermediate time in electron transport through a photon cavity
Vidar Gudmundsson, Hallmann Gestsson, Nzar Rauf Abdullah +3
We model theoretically the time-dependent transport through an asymmetric double quantum dot etched in a two-dimensional wire embedded in a FIR photon cavity. For the transient and…
Light-hole exciton mixing and dynamics in Mn-doped quantum dots
V. Moldoveanu, I. V. Dinu, R. Dragomir +1
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…
Quantum turnstile operation of single-molecule magnets
V. Moldoveanu, I. V. Dinu, B. Tanatar +1
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. W…
Transport in a hybrid normal-topological superconductor Kondo model
Razvan Chirla, I. V. Dinu, V. Moldoveanu +1
We investigate the equilibrium and non-equilibrium transport through a quantum dot in the Kondo regime, embedded between a normal metal and a topological superconductor supporting…
On the cotunneling regime of interacting quantum dots
Horia D. Cornean, Valeriu Moldoveanu
Consider a bunch of interacting electrons confined in a quantum dot. The later is suddenly coupled to semi-infinite biased leads at an initial instant . We identify the domina…
Non-equilibrium steady-states for interacting open systems: exact results
Valeriu Moldoveanu, Horia D. Cornean, Claude-Alain Pillet
Under certain conditions we prove the existence of a steady-state transport regime for interacting mesoscopic systems coupled to reservoirs (leads). The partitioning and partition-…
Coulomb-induced dynamic correlations in a double nanosystem
Valeriu Moldoveanu, Andrei Manolescu, Vidar Gudmundsson
Time-dependent transport through two capacitively coupled quantum dots is studied in the framework of the generalized master equation. The Coulomb interaction is included within th…
Turnstile pumping through an open quantum wire
Cosmin Mihai Gainar, Valeriu Moldoveanu, Andrei Manolescu +1
We use a non-Markovian generalized master equation (GME) to describe the time-dependent charge transfer through a parabolically confined quantum wire of a finite length coupled to…
Time-dependent magnetotransport in semiconductor nanostructures via the generalized master equation
Vidar Gudmundsson, Chi-Shung Tang, Cosmin Mihai Gainar +2
Transport of electrons through two-dimensional semiconductor structures on the nanoscale in the presence of perpendicular magnetic field depends on the interplay of geometry of the…