Results 41 to 50 of about 3,292,049 (296)

Quantum Pumping with Adiabatically Modulated Barriers in Three-Band Pseudospin-1 Dirac–Weyl Systems

open access: yesEntropy, 2019
In this work, pumped currents of the adiabatically-driven double-barrier structure based on the pseudospin-1 Dirac⁻Weyl fermions are studied. As a result of the three-band dispersion and hence the unique properties of pseudospin-1 Dirac⁻Weyl ...
Xiaomei Chen, Rui Zhu
doaj   +1 more source

Quantum State of the Fermionic Carriers in a Transport Channel Connecting Particle Reservoirs

open access: yesCondensed Matter, 2019
We analyze the quantum state of fermionic carriers in a transport channel attached to a particle reservoir. The analysis is done from first principles by considering microscopic models of the reservoir and transport channel.
Andrey R. Kolovsky   +1 more
doaj   +1 more source

CUDA Quantum

open access: yes, 2023
<p>CUDA Quantum is now available <a href="https://pypi.org/project/cuda-quantum/">on PyPI</a>! For the initial PyPI release, the NVIDIA multi-gpu and tensornet backends are not yet included. Check out our Docker images <a href="https:
The CUDA Quantum development team
core   +1 more source

Vibrationally assisted quantum energy pumps

open access: yesNew Journal of Physics, 2015
We show that directed energy transport in a linear array of coupled quantum dots can be achieved by a coherent coupling of each dot to a single coherently driven mechanical mode.
C R Myers, G J Milburn, J Twamley
doaj   +1 more source

Quantum transport in semiconductors

open access: yesContemporary Physics, 1980
A review is made of the quantum effects which are observed in the transport coefficients of semiconductors.
openaire   +2 more sources

Spin transport in a quantum wire [PDF]

open access: yesPhysical Review B, 2002
We study the effect of electron-electron backscattering interactions on spin transport in a quantum wire. Even if these interactions have no significant effect on charge transport, they strongly influence the transport of spin. We use the quantum Boltzmann equation in the collision approximation to derive equations of motion for spin current and ...
Bena, Cristina, Balents, Leon
openaire   +3 more sources

Investigation of carbon nanotube quantum dots connected to ferromagnetic leads [PDF]

open access: yes, 2015
The implementation of ferromagnetic contacts in complex nanoelectronic devices, e.g. in spin-valves bears great potential for applications and fundamental investigations. Spin-valves are structures with two magnetic contacts and a non-magnetic medium (
Samm, Julia
core   +1 more source

Reconstructing enzyme evolution by protein engineering

open access: yesFEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler   +2 more
wiley   +1 more source

Electrons, Localization but no Hopping: Disorder as Key for Understanding Charge Transport in Mesoporous Silicon

open access: yesSmall Structures
This article presents a unique study on the charge carrier transport in electrochemically anodized mesoporous silicon by combining macroscopic conductivity and thermopower measurements.
Tommy Hofmann   +4 more
doaj   +1 more source

Dynamic heat transport in open quantum systems [PDF]

open access: yes
Heat transport in driven nanoscale systems plays a critical role in quantum technologies and in non-equilibrium thermodynamics. More specifically, the investigation of time-dependent temperatures in quantum systems is a developing field that has seen ...
de Castro Portugal, Pedro Vinicius
core   +1 more source

Home - About - Disclaimer - Privacy