Quantum phase transition in a realistic double-quantum-dot system

Kleeorin, Yaakov; Meir, Yigal

doi:10.1038/s41598-018-28822-y

Cited by 5 publications

(1 citation statement)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…given by [33], Bas J Sci 40( 1 . Where the dimensionless depend on charge and spin are given in the following formulas:…”

Section: Model and Formalismmentioning

confidence: 99%

The Charge and Spin Thermoelectric Properties across Double Quantum Dots Serially Coupled to Ferromagnetic Leads: The Case of Parallel Magnetic Configuration

Najdi

2022

basjs

View full text Add to dashboard Cite

In this article, the charge and spin thermoelectric properties of double quantum dots system connected to ferromagnetic leads with collinear magnetic configurations will be studied in the linear response regime. Our results are calculated in a strong interdot coupling regime by taking into consideration all parameters affecting the system such as interaction between dots and their coupling to the leads, intradot Coulomb correlation energy and spin-polarization on the leads. It is found that in the parallel magnetic configuration, the thermoelectric efficiency can reach a large value around the spin-down resonance levels when the tunneling coupling between the quantum dots and the leads for the spin-down electrons are small, which leads to the pure spin Seebeck contribution. As a result, this system can generate a spin-polarized current. The value of the spin figure of merit is enhanced by increasing the spin-polarization and decreasing the correlation energy.

show abstract

“…given by [33], Bas J Sci 40( 1 . Where the dimensionless depend on charge and spin are given in the following formulas:…”

Section: Model and Formalismmentioning

confidence: 99%

The Charge and Spin Thermoelectric Properties across Double Quantum Dots Serially Coupled to Ferromagnetic Leads: The Case of Parallel Magnetic Configuration

Najdi

2022

basjs

View full text Add to dashboard Cite

show abstract

Heat current across double quantum dots in series coupled to ferromagnetic leads in antiparallel configuration within weak interdot coupling regime

2021

View full text Add to dashboard Cite

Transparent qubit manipulations with spin-orbit coupled two-electron nanowire quantum dot

Kuo

Wang

Chen

et al. 2021

Sci Rep

View full text Add to dashboard Cite

We report on the first set of exact orthonormalized states to an ac driven one-dimensional (1D) two-electron nanowire quantum dot with the Rashba–Dresselhaus coexisted spin-orbit coupling (SOC) and the controlled magnetic field orientation and trapping frequency. In the ground state case, it is shown that the spatiotemporal evolutions of probability densities occupying internal spin states and the transfer rates between different spin states can be adjusted by the ac electric field and the intensities of SOC and magnetic field. Effects of the system parameters and initial-state-dependent constants on the mean entanglement are revealed, where the approximately maximal entanglement associated with the stronger SOC and its insensitivity to the initial and parametric perturbations are demonstrated numerically. A novel resonance transition mechanism is found, in which the ladder-like time-evolution process of expected energy and the transition time between two arbitrary exact states are controlled by the ac field strength. Using such maximally entangled exact states to encode qubits can render the qubit control more transparent and robust. The results could be extended to 2D case and to an array of two-electron quantum dots with weak neighboring coupling for quantum information processing.

show abstract

Quantum phase transition in a realistic double-quantum-dot system

Cited by 5 publications

References 28 publications

The Charge and Spin Thermoelectric Properties across Double Quantum Dots Serially Coupled to Ferromagnetic Leads: The Case of Parallel Magnetic Configuration

The Charge and Spin Thermoelectric Properties across Double Quantum Dots Serially Coupled to Ferromagnetic Leads: The Case of Parallel Magnetic Configuration

Heat current across double quantum dots in series coupled to ferromagnetic leads in antiparallel configuration within weak interdot coupling regime

Transparent qubit manipulations with spin-orbit coupled two-electron nanowire quantum dot

Contact Info

Product

Resources

About