Resonant-tunneling in discrete-time quantum walk

Time-dependent resonant tunneling via two discrete states.

Time-dependent tunneling phenomena have received increasing attention in recent years. In the early eighties, Büttiker and Landauer studied the tunneling time needed for an electron to traverse a potential barrier. More recent theoretical work focused on the time-dependence of resonant tunneling using an effective Schrödinger equation and on a description of the time-dependent current through m...

Discrete-time quantum walk with feed-forward quantum coin

Constructing a discrete model like a cellular automaton is a powerful method for understanding various dynamical systems. However, the relationship between the discrete model and its continuous analogue is, in general, nontrivial. As a quantum-mechanical cellular automaton, a discrete-time quantum walk is defined to include various quantum dynamical behavior. Here we generalize a discrete-time ...

Resonant tunneling in graphene pseudomagnetic quantum dots.

Realistic relaxed configurations of triaxially strained graphene quantum dots are obtained from unbiased atomistic mechanical simulations. The local electronic structure and quantum transport characteristics of y-junctions based on such dots are studied, revealing that the quasi-uniform pseudomagnetic field induced by strain restricts transport to Landau level- and edge state-assisted resonant ...

No resonant tunneling in quantum field theory

We investigate the nature of resonant tunneling in Quantum Field Theory. Following the pioneering work of Banks, Bender and Wu we describe quantum field theory in terms of infinite dimensional quantum mechanics and utilize the “Most probable escape path” (MPEP) as the class of paths which dominate the path integral in the classically forbidden region. Considering a 1+1 dimensional field theory ...

9 Resonant Tunneling in Quantum Structures