126 citations · 469 across the 43 of their papers we have counts for
13 papers · 1 filter
Resonant tunneling diodes in semiconductor microcavities: modeling polaritonic features in the THz displacement current
Carlos F. Destefani, Matteo Villani, Xavier Cartoixà +2
We develop in this work a simple qualitative quantum electron transport model, in the strong light-matter coupling regime under dipole approximation, able to capture polaritonic si…
There is Plenty of Room for THz Tunneling Electron Devices Beyond the Transit Time Limit
Matteo Villani, Simone Clochiatti, Werner Prost +2
The traditional transmission coefficient present in the original Landauer formulation, which is valid for quasi-static scenarios with working frequencies below the inverse of the e…
Noise and charge discreteness as ultimate limit for the THz operation of ultra-small electronic devices
Enrique Colomés, Javier Mateos, Tomás González +1
To manufacture faster electron devices, the industry has entered into the nanoscale dimensions and Terahertz (THz) working frequencies. The discrete nature of the few electrons pre…
Including arbitrary geometric correlations into one-dimensional time-dependent Schrödinger equations
Devashish Pandey, Xavier Oriols, Guillermo Albareda
The so-called Born-Huang ansatz is a fundamental tool in the context of ab-initio molecular dynamics, viz., it allows to effectively separate fast and slow degrees of freedom and t…
Stochastic Schrödinger equations and conditional states: a general Non-Markovian quantum electron transport simulator for THz electronics
Devashish Pandey, Enrique Colomés, Guillermo Albareda +1
A prominent tool to study the dynamics of open quantum systems is the reduced density matrix. Yet, approaching open quantum systems by means of state vectors has well known computa…
Coulomb and exchange interaction effects on the exact two-electron dynamics in the Hong-Ou-Mandel interferometer based on Hall edge states
Laura Bellentani, Paolo Bordone, Xavier Oriols +1
The electronic Hong-Ou-Mandel interferometer in the integer quantum Hall regime is an ideal system to probe the building up of quantum correlations between charge carriers and it h…
Implications of the Klein tunneling times on high frequency graphene devices using Bohmian trajectories
Devashish Pandey, Matteo Villani, Enrique Colomés +2
Because of its large Fermi velocity, leading to a great mobility, graphene is expected to play an important role in (small signal) radio frequency electronics. Among other, graphen…
Quantum time-dependent Monte Carlo simulation of electron devices with 2D linear-band materials: a genuine TeraHertz signature for graphene
Zhen Zhan, Xueheng Kuang, Enrique Colomés +3
An intrinsic electron injection model for linear band two-dimensional (2D) materials, like graphene, is presented and its coupling to a recently developed quantum time-dependent Mo…
Limitations of the intrinsic cut-off frequency to correctly quantify the speed of nanoscale transistors
Zhen Zhan, Enrique Colomés, Xavier Oriols
The definition of the intrinsic cut-off frequency () based on the current gain equals to one (0 dB) is critically analyzed. A condition for the validity of the quasi-static es…
BITLLES: Electron Transport Simulation with Quantum Trajectories
Guillermo Albareda, Damiano Marian, Abdelilah Benali +3
After the seminal work of R. Landauer in 1957 relating the electrical resistance of a conductor to its scattering properties, much progress has been made in our ability to predict…
Time-dependent simulation of particle and displacement currents in THz graphene transistors
Z. Zhan, E. Colomès, A. Benali +2
Although time-independent models provide very useful dynamical information with a reduced computational burden, going beyond the quasi-static approximation provides enriched inform…
Exchange Interaction Effects on the Conductance of Quantum Wires
Xavier Oriols
The effect of exchange interaction on the two-terminal conductance of fully ballistic samples is studied using a many-particle wave packet formalism. The approach shows that the pu…
Description of Quantum Beams Using a Stationary Incoherent Superposition of Wave Packets
Xavier Oriols, Jordi Sune
An original entity is defined to study quantum beams of conserved particles. The beam is described as a Stationary Incoherent Superposition of Wave packets (SISOW). Mean values are…