SIMON 電路模擬軟體

A Single Electron Device and Circuit Simulator

SIMON is a sophisticated multipurpose simulator for single-electron devices and circuits. It features a graphical circuit editor embedded in a graphical user interface as well as the simulation of co-tunnel events and a single step interactive analyses mode. It supports energy dependent density of states and is able to calculate stability plots.

■ Features of SIMON 2.0:

STABILITY PLOT

★ traditional stability plot with two voltages as x- and y-axis

★ one axis can be the temperature

★ one or both axis can be a capacitance or resistance

★ differentiation in x or y direction possible

NORMAL RESISTORS

★ normal resistors allow the modeling of more complex and realistic circuits

CURRENT SOURCES

★ current sources can be specified with a certain charge-granularity, which allows the modeling of electron injectors/pumps/turnstiles in a very easy manner

ENERGY DEPENDENT DENSITY OF STATES

★ The tunnel model has been improved by incorporating three kinds of density of states functions

★ constant with optional bandgap (metallic)

★ square-root with bandgap (semiconductor-like)

★ x/(x²-1)^1/2 with bandgap (superconductor-like)

★ discrete energy levels are modeled as gaussian functions, with mean, width, and height.

SUPPORT FOR SUPERCONDUCTING TUNNEL JUNCTIONS

★ quasiparticle tunneling

FULL SUPPORT FOR LINUX

★ SIMON is shipped in a software package where all necessary libraries (tcl/tk) are wrapped into the application. Hence no need to install any 3rd party tools to run SIMON on Linux. The installation is as easy as copying a file into a subdirectory. 

EASY TO USE

★ simple automatic installation for Windows operating systems

★ graphical user interface

★ graphical circuit editor (drag and drop assembly of circuits; few mouse clicks and your circuit is assembled)

★ graphical visualization of simulation results (you can plot many graphs in one diagram; compare results from different simulations)

CO-TUNNELING

★ co-tunneling is simulated up to a user specified order

★ two different co-tunnel simulation algorithms are available

INTERACTIVE SINGLE-STEP MODE

★ single electrons can be forced to tunnel through particular tunnel junctions in an interactive fashion

★ the system energy, all node voltages, and all node charges are updated automatically