A dynamical method for simulating steady-state conduction in atomic and molecular wires is presented which is both computationally and conceptually simple. The method is tested by calculating the current-voltage spectrum of a simple diatomic molecular junction, for which the static Landauer approach produces multiple steady-state solutions. The dynamical method quantitatively reproduces the sta...

Associating molecular structure with quantum interference features in electrode-molecule-electrode transport junctions has been difficult because existing guidelines for understanding interferences only apply to conjugated hydrocarbons. Herein we use linear algebra and the Landauer-Büttiker theory for electron transport to derive a general rule for predicting the existence and locations of inte...

We study the quantum noise of the electronic current in a double-barrier system with a single resonant level. In the framework of the Landauer formalism, we treat the double barrier as a quantum coherent scattering region that can exchange photons with a coupled electric field, e.g., a laser beam or a periodic ac bias voltage. As a consequence of the manifold parameters that are involved in thi...

We study the propagation of electromagnetic waves in one-dimensional quasiperiodic systems and its dispersion relation for plane waves and for waveguide structures. In the photonic band gaps, periodic, Fibonacci, and Thue-Morse multilayer systems can be described by a complex effective wave vector. Its negative imaginary part causes an exponential decay of the transmission coefficient due to a ...

Minimizing energy dissipation has emerged as the key challenge in continuing to scale the performance of digital computers. The question of whether there exists a fundamental lower limit to the energy required for digital operations is therefore of great interest. A well-known theoretical result put forward by Landauer states that any irreversible single-bit operation on a physical memory eleme...

When combining lumped mesoscopic electronic components to form a circuit, quantum fluctuations of electrical quantities lead to a nonlinear electromagnetic interaction between the components, which is generally not understood. The Landauer-Büttiker formalism that is frequently used to describe noninteracting coherent mesoscopic components is not directly suited to describe such circuits since i...

The single-parameter scaling ~SPS! hypothesis is the cornerstone of the current understanding of the localization phenomena. It was originally formulated in terms of the scaling behavior of the conductance of disordered conductors, where it was suggested that when the length, L, of a disordered conductor increases, the evolution of the conductance, g(L), is determined by a single parameter, g i...

Using the recently developed time-dependent Landauer-B\"uttiker formalism and Jefimenko's retarded solutions to Maxwell equations, we show how compute electromagnetic field produced by charge current densities in nanojunctions out of equilibrium. We then apply this a benzene ring junction that geometry-dependent quantum interference effects can be used control magnetic vicinity molecule. Then, ...