# QCAD

## GUI environment for Quantum Computer Simulator

English/Japanese

## About QCAD

"QCAD" is a windows-based environment for quantum computing simulation which helps you designing circuits and simulating them.

### Functions

GUI Environment to design quantum circuits:
- QCAD enables you to design quantum circuits easily with full GUI(graphical user interface) environment.

Export-able EPS and BMP:
- QCAD can export the designed circuits as Encapsulated Postscript(EPS) in order to include in LaTeX files.

Builtin Simulator:
- QCAD can simulate the designed circuited and show results(states of qubits).

## Screen Shots

### Execution Images

(click to get a larger image)

### Result Images

EPS file created by QCAD

## Download

Get the latest release of QCAD from here.

## System Requirements

- Windows XP/Vista or later.
- Enough memory. If you want to simulate a large circuits, please be careful.

## Online Document

For detailed information, refer to Online QCAD help file.

## Related software

QCE is a software tool that emulates various hardware designs of Quantum Computers. (University of Groningen, The Netherlands)

## License

Copyright © 2002 - 2011 QCAD Developers Team

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. In any scientific publication based wholly or in part on the Software, the use of the Software must be acknowledged.
2. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
3. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

    THIS SOFTWARE IS PROVIDED ''AS IS'' AND ANY EXPRESS OR IMPLIED
    WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
    FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL  OR
    CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
    ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
    ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

## About Developers

- Hiroshi Watanabe (Representative)
- Masaru Suzuki (Programmer)
- Junnosuke Yamazaki (Programmer)

## Known Problems

QCAD has some problems as following.

1. Measurement gates on QCAD are different from real measurements. See the helpfile for detail.
2. Step-by-step execution is not available yet.

## Acknowledgements

This work is supported by a grant under the youth section of Exploratory Software Project FY2002 (IPA, Japan). This software was developed at the University of Tokyo and Nagoya University.