![]() The solver has shown robust nonlinear convergence even in the milli-Kelvin temperature range, and has been extensively used to quickly obtain the semiclassical electrostatic potential in DQD devices. The Poisson solver includes Maxwell- Boltzmann and Fermi-Dirac statistics, supports Dirichlet, Neumann, interface charge, and Robin boundary conditions, and includes the e ect of dopant incomplete ionization. The simulator has three di erentiating features: (i) its core contains nonlinear Poisson, e ective mass Schrodinger, and Con guration Interaction solvers that have massively parallel capability for high simulation throughput, and can be run individually or combined self-consistently for 1D/2D/3D quantum devices (ii) the core solvers show superior convergence even at near-zero-Kelvin temperatures, which is critical for modeling quantum computing devices (iii) it couples with an optimization engine Dakota that enables optimization of gate voltages more » in DQDs for multiple desired targets. Published under the MIT license.We present the Quantum Computer Aided Design (QCAD) simulator that targets modeling quantum devices, particularly silicon double quantum dots (DQDs) developed for quantum qubits. if an edge length is smaller than 1.75*distance, then only one gap will be added in the middle.if the edge length is less than 1.5*width, the whole segment will be deleted (it works only for line segments).Add gaps to other segments and finally terminate the plugin with a right click in the document.Ĭurrently the plugin can only work with lines, arcs, circles and polylines. You can unlock a preview with a second click. If the preview is okay, just click to lock it. Hover to one of the lines and you will see a preview of the new gap positions. You have to select the cutting layer first. Call this plugin via Misc > Modify > AddGaps. The second plugin can be used to add gaps to the cuttings. practically it is the half of the cutting width.all cuttings will be adjusted by that offset (the areas of inner contours becomes smaller, outer contours bigger).small overlapping is allowed, as long as all points are on the area between the contours.all engravings must be on the area between inner and outer contours.Set the values in the dialog and confirm it. Prepare your drawing as explained in the section before and open the plugin via Misc > Modify > Prepare. ![]() ![]() contours and engravings of one part don't need to be grouped in a block.not wanted entities like hatches, dimensions, texts and all kind of constructive entities (points, infinite lines, rays) will be removed.allowed entities are lines, polylines, arcs and ellipses.all entities will be moved to layer 0 (except engravings).The result is a drawing with only two layers: one for the cuttings/contours and one for the engravings. The main purpose of the first plugin is to prepare the drawing for laser cutting. all layers must be visible and unlocked.contours (inner and outer) and engravings must be clearly separated from each other.There are a few things that you should consider before using the plugins. If neither Misc nor Modify exists, create them! AttentionĪlways use a copy of your original drawing! Conditions Take the two zip files in the dist directory and unpack it into scripts/Misc/Modify of your QCAD installation. Dependenciesĭownload the whole project with the download-button in the upper right or by cloning it using Git. Primarily they should be used for model making. They are designed to prepare drawings for laser cutting. This repository contains two plugins for QCAD.
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