Zobrazeno 1 - 10
of 56
pro vyhledávání: '"Schiller, Avraham"'
Publikováno v:
Phys. Rev. B 93, 125437 (2016)
The transient processes of electron transport in nano-scale devices exhibit special phenomena that exist only in the transient regime. Besides how fast the steady states are approached, one interesting aspect of transient transport arises from its st
Externí odkaz:
http://arxiv.org/abs/1601.01081
Publikováno v:
Phys. Rev. B 90, 155110 (2014)
We develop a low-order conserving approximation for the interacting resonant-level model (IRLM), and apply it to (i) thermal equilibrium, (ii) nonequilibrium steady state, and (iii) nonequilibrium quench dynamics. Thermal equilibrium is first used to
Externí odkaz:
http://arxiv.org/abs/1406.0254
Publikováno v:
Phys. Rev. B 89, 024307 (2014)
In molecular devices electronic degrees of freedom are coupled to vibrational modes of the molecule, offering an opportunity to study fundamental aspects of this coupling between at the nanoscale. To this end we consider the nonequilibrium heat excha
Externí odkaz:
http://arxiv.org/abs/1310.7723
Publikováno v:
Phys. Rev. B 87, 075319 (2013)
The crossover between two customary limits of phonon-assisted tunneling, the adiabatic and antiadiabatic regimes, is studied systematically in the framework of a minimal model for molecular devices: a resonant level coupled by displacement to a local
Externí odkaz:
http://arxiv.org/abs/1303.7161
Autor:
Guettge, Fabian, Anders, Frithjof B., Schollwoeck, Ulrich, Eidelstein, Eitan, Schiller, Avraham
Publikováno v:
Phys. Rev. B 87, 115115 (2013)
A hybrid approach to nonequilibrium dynamics of quantum impurity systems is presented. The numerical renormalization group serves as a means to generate a suitable low-energy Hamiltonian, allowing for an accurate evaluation of the real-time dynamics
Externí odkaz:
http://arxiv.org/abs/1206.2186
Publikováno v:
Phys. Rev. B 85, 075118 (2012)
The time-dependent numerical renormalization-group approach (TD-NRG), originally devised for tracking the real-time dynamics of quantum-impurity systems following a single quantum quench, is extended to multiple switching events. This generalization
Externí odkaz:
http://arxiv.org/abs/1201.3080
Publikováno v:
Phys. Rev. B 85, 035411 (2012)
The nonequilibrium dynamics of molecular devices is studied in the framework of a generic model for single-molecule transistors: a resonant level coupled by displacement to a single vibrational mode. In the limit of a broad level and in the vicinity
Externí odkaz:
http://arxiv.org/abs/1109.5590
The quantum phase transition from a spin-Peierls phase with a small Fermi surface to a paramagnetic Luttinger-liquid phase with a large Fermi surface is studied in the framework of a one-dimensional Kondo-Heisenberg model that consists of an electron
Externí odkaz:
http://arxiv.org/abs/1102.2573
Autor:
Schiller, Avraham, Andrei, Natan
A strong-to-weak-coupling duality is established for the nonequilibrium interacting resonant-level model, describing tunneling through a single spinless level, capacitively coupled to two leads by a contact interaction. For large capacitive coupling,
Externí odkaz:
http://arxiv.org/abs/0710.0249
Autor:
Schiller, Avraham, Silva, Alessandro
Publikováno v:
Phys. Rev. B 77, 045330 (2008)
Transport properties of ultrasmall quantum dots with a single unpaired electron are commonly modeled by the nonequilibrium Kondo model, describing the exchange interaction of a spin-1/2 local moment with two leads of noninteracting electrons. Remarka
Externí odkaz:
http://arxiv.org/abs/0704.3014