Self-consistent ac quantum transport using nonequilibrium Green functions
نویسندگان
چکیده
منابع مشابه
Quantum transport and noise in resonant tunneling diode using self-consistent Green function calculation
The fully self-consistent non-equilibrium Green function approach to the quantum transport is developed for the investigation of one-dimensional nano-scale devices. Numerical calculations performed for resonant tunneling diodes of different designs and at different temperatures show reasonable results for the potential and electron density profiles, as well as for the transmission coefficient a...
متن کاملQuantum transport through a quantum dot: Combining the scattering-states numerical renormalization group with nonequilibrium Green functions
Scattering states fulfill the correct boundary conditions of a current carrying open quantum system. Discretizing the energy continuum of these states allows for employing Wilson’s numerical renormalization group approach without violating the boundary conditions by using a finite size system. We evolve the analytically known steady-state density operator for a non-interacting quantum-system at...
متن کاملSelf-Selection Consistent Functions
This paper studies collective choice rules whose outcomes consist of a collection of simultaneous decisions, each one of which is the only concern of some group of individuals in society. The need for such rules arises in different contexts, including the establishment of jurisdictions, the location of multiple public facilities, or the election of representative committees. We define a notion ...
متن کاملTransport in nanostructures: A comparison between nonequilibrium Green functions and density matrices
Stationary electric transport in semiconductor nanostructures is studied by the method of nonequilibrium Green functions. In the case of sequential tunneling the results are compared with density matrix theory, providing almost identical results. Nevertheless, the method of Green functions is easier to handle due to the availability of an absolute energy scale. It is demonstrated, that the tran...
متن کاملAC Transport at Holographic Quantum Hall Transitions
We compute AC electrical transport at quantum Hall critical points, as modeled by intersecting branes and gauge/gravity duality. We compare our results with a previous field theory computation by Sachdev, and find unexpectedly good agreement. We also give general results for DC Hall and longitudinal conductivities valid for a wide class of quantum Hall transitions, as well as (semi)analytical r...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2010
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.81.115455