Delocalization of electrons by cavity photons in transport through a quantum dot molecule

@article{Abdullah2014DelocalizationOE,
  title={Delocalization of electrons by cavity photons in transport through a quantum dot molecule},
  author={Nzar Rauf Abdullah and Chi-Shung Tang and Andrei Manolescu and Vidar Gudmundsson},
  journal={Physica E-low-dimensional Systems \& Nanostructures},
  year={2014},
  volume={64},
  pages={254-262}
}
Abstract We present results on cavity-photon-assisted electron transport through two lateral quantum dots embedded in a finite quantum wire. The double quantum dot system is weakly connected to two leads and strongly coupled to a single quantized photon cavity mode with initially two linearly polarized photons in the cavity. Including the full electron–photon interaction, the transient current controlled by a plunger-gate in the central system is studied by using quantum master equation… 
Oscillations in electron transport caused by multiple resonances in a quantum dot-QED system in the steady-state regime
We model the electron transport current as the photon energy is swept through several resonances of a multi-level quantum dot, embedded in a short quantum wire, coupled to photon cavity. We use a
Cavity-photon controlled electron transport through quantum dots and waveguide systems
In this thesis, I model quantum mechanical systems and investigate their quantum properties based on mathematical formulations of quantum mechanics. Modeling of quantum systems such as qubits in
Thermoelectric Inversion in a Resonant Quantum Dot-Cavity System in the Steady-State Regime
TLDR
It is observed that the photon replica states contribute to the transport irrespective of the direction of the thermal gradient, and the photon field can change both the magnitude and the sign of the thermoelectric current induced by the temperature gradient in the absence of a voltage bias between the leads.
The interplay of electron–photon and cavity-environment coupling on the electron transport through a quantum dot system
Abstract We theoretically investigate the characteristics of the electron transport through a two-dimensional a quantum dot system in the x y -plane coupled to a photon cavity and a photon reservoir,
Manifestation of the Purcell Effect in Current Transport through a Dot–Cavity–QED System
TLDR
The Purcell effect enhances the current peaks through the cavity by increasing the cavity–reservoir coupling, while they decrease with increasing electron–photon coupling, and the resonant current peaks are also sensitive to the mean number of photons in the reservoir.
The photocurrent generated by photon replica states of an off-resonantly coupled dot-cavity system
TLDR
It is shown that the current generated through the photon replicas is very sensitive to the photon polarization, but it is not strongly dependent on the average number of photons in the environment.
Cavity‐photon contribution to the effective interaction of electrons in parallel quantum dots
A single cavity photon mode is expected to modify the Coulomb interaction of an electron system in the cavity. Here we investigate this phenomena in a parallel double quantum dot system. We explore
Rabi-resonant and intraband transitions in a multilevel quantum dot system controlled by the cavity-photon reservoir and the electron-photon coupling
Abstract The transport properties of a wire-dot system coupled to a quantized single photon with linear polarization in a 3D-cavity is theoretically studied using a quantum master equation. The
Photon-Mediated Thermoelectric and Heat Currents through a Resonant Quantum Wire-Cavity System
We theoretically consider a short quantum wire, which on both ends is connected to leads that have different temperatures. The quantum wire is assumed to be coupled to a cavity with a single-photon
Cavity-photon-switched coherent transient transport in a double quantum waveguide
We study a cavity-photon-switched coherent electron transport in a symmetric double quantum waveguide. The waveguide system is weakly connected to two electron reservoirs, but strongly coupled to a
...
1
2
...

References

SHOWING 1-10 OF 32 REFERENCES
Electron transport through a quantum dot assisted by cavity photons.
We investigate transient transport of electrons through a single quantum dot controlled by a plunger gate. The dot is embedded in a finite wire with length Lx assumed to lie along the x-direction
Time-dependent transport of electrons through a photon cavity
We use a non-Markovian master equation to describe the transport of Coulomb-interacting electrons through an electromagnetic cavity with one quantized photon mode. The central system is a
Enhanced photon-assisted spin transport in a quantum dot attached to ferromagnetic leads
We investigate real-time dynamics of spin-polarized current in a quantum dot coupled to ferromagnetic leads in both parallel and antiparallel alignments. While an external bias voltage is taken
Quantum photovoltaic effect in double quantum dots
We analyze the photovoltaic current through a double quantum dot system coupled to a high-quality driven microwave resonator. The conversion of photons in the resonator to electronic excitations
Quantum master equation for electron transport through quantum dots and single molecules
A quantum master equation QME is derived for the many-body density matrix of an open current-carrying system weakly-coupled to two metal leads. The dynamics and the steady-state properties of the
Photon-assisted-tunneling in a coupled double quantum dot under high microwave excitation powers
We perform photon-assisted-tunneling (PAT) experiments on a GaAs double quantum dot device under high microwave excitation power. Photon-assisted absorption of up to 14 photons is observed, when
Photon-assisted transport in semiconductor nanostructures
Abstract In this review we focus on electronic transport through semiconductor nanostructures which are driven by ac fields. Along the review we describe the available experimental information on
Photon-assisted tunneling through self-assembled InAs quantum dots in the terahertz frequency range.
TLDR
A very high coupling efficiency between THz waves and QDs is realized and multiphoton absorption up to the fourth-order is observed during the tunneling process, resulting in almost complete lifting of the Coulomb blockade.
Double quantum dot in a quantum dash: Optical properties
We study the optical properties of highly elongated, highly flattened quantum dot structures, also referred to as quantum dashes, characterized by the presence of two trapping centers located along
Resonant photon-assisted tunneling through a double quantum dot: An electron pump from spatial Rabi oscillations.
The time average of the fully nonlinear current through a double quantum dot, subject to an arbitrary combination of ac and dc voltages, is calculated exactly using the Keldysh nonequilibrium Green
...
1
2
3
4
...