We investigate the possibility to manipulate for the transport through heterostructures the dc current and its noise properties by an ac gate voltage. For a computation of the noise strength, we map the system to a tight-binding model for which noise suppression by ac fields has been predicted recently. The quality of this description is tested by comparing the transmission of the tight-binding...

In this paper we propose a new design of a spin-dependent polarizer based on a quantum dot array coupled to leads. By lifting the spin degeneracy of the carriers in the quantum dots by means of a magnetic field, Fano and Dicke effects may be used as effective means to generate spin-polarized currents. A detailed analysis of the spin-dependent transmission and polarized current as a function of ...

In present times, the protection of Optical signal data is becoming very important as large amount of internet data is transferred through Optical fibres. The data can be easily protected by encrypting data before transmission. There many different techniques for optical signal encryption. In this paper, we survey on existing methods used in optical signal encryption. Keywords— Fibre Bragg Grat...

663 Identifying New Positives and Linkage to HIV Medical Care — 23 Testing Site Types, United States, 2013 668 Outbreaks of Illness Associated with Recreational Water — United States, 2011–2012 673 State Tobacco Control Program Spending — United States, 2011 679 Notes from the Field: Measles Transmission in an International Airport at a Domestic Terminal Gate — April–May 2014 680 QuickStats Nat...

A new algorithm for the generation of test sequences to detect dynamic errors due to re ection and crosstalk noise in combinational circuits is presented. Based on the circuit level a new approach for error modeling including the duration of re ection and crosstalk errors, is described. The presented algorithm takes the high in uence of error durations as well as gate and transmission line dela...

Based on an active transmission line concept and twodimensional (2-D) device simulations, an accurate and computationally efficient simulation technique for high frequency noise performance of MOSFETs is demonstrated. Using a Langevin stochastic source term model and small-signal equivalent circuit of the MOSFET, three intrinsic noise parameters ( , , and ) for the drain noise and induced gate ...

In Minecraft, circuits can be assembled from redstone components. We introduce PERSHING, a place and route tool that can transform a gate-level netlist into logic gates built of redstone in Minecraft, without the need for external Minecraft mods. We discuss challenges, such as vertical signal transmission, and the algorithms used to perform placement and routing. We show preliminary results, in...

We describe the results of a theoretical study of transport through gated metallic graphene nanoribbons using a nonequilibrium Green function method. Although analogies with quantum field theory predict perfect transmission of chiral fermions through gated regions in one dimension, we find perfect reflection of chiral fermions in armchair ribbons for specific configurations of the gate. This ef...