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<!DOCTYPE html>
<html lang="en">
<head>
<title>Programming Quantum Computers</title>
<meta charset="utf-8">
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{ alert('Beta Error: ' + message + ' src:' + source + ' line:' + lineno + ' col:' + colno); }
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<script type="text/javascript" src="https://machinelevel.github.io/QCEngine/beta/src/qcengine_bitfield.js"></script>
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<a href="https://shop.oreilly.com/product/0636920167433.do" class="info-button" target="_blank">Book Info</a>
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<a href="https://www.amazon.com/Programming-Quantum-Computers-Essential-Algorithms/dp/1492039683" class="info-button" target="_blank">Buy on Amazon</a>
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<b>This sample takes a while to run.</b>
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<span id="display_qss_span"></span>
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<canvas id="display_confidence"></canvas><br/>
<span id="display_confidence_span"></span>
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<div class="container-fluid pad-right-only">
<div class="panel panel-default">
<div class="panel-heading">
<b>State vector</b>
<div class="btn-group">
<button type="button" class="btn btn-default" onclick="click_circle_zoom(-1);">
<span class="glyphicon glyphicon-zoom-out"></span>
</button>
<button type="button" class="btn btn-default" onclick="click_circle_zoom(1);">
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QCEngine is intended to be a lightweight quantum computation simulator,
useful for quick sketches and demonstrations.
<br/>
<br/>
It will let you run JavaScript code, simulating the quantum computing as
though you had a real QC, up to about 25 qubits (depending on your browser).
The best way to get familiar with QCEngine is to run the book samples on
this page.
<br/>
<br/>
For more serious development tasks, there are many other simulation engines available:
<br/>
<ul>
<li><b><a href="qiskit.org" target="_default">Qiskit</a></b> -
An open-source software development kit (SDK) for working with OpenQASM and the
IBM Q quantum processors. Create quantum computing programs, compile, and execute them online
in a real quantum processors.</li>
<li><b><a href="https://quantum-computing.ibm.com" target="_default">IBM Q Experience</a></b> -
A complete online environment, containing tools and information for programming quantum
simulations as well as physical quantum computers.</li>
<li><b><a href="https://www.microsoft.com/en-us/quantum/development-kit" target="_default">Microsoft QDK</a></b> -
A complete software development system for developing and running programs for quantum computers.</li>
<li><b><a href="http://www.quantumplayground.net" target="_default">Google QC Playground</a></b> -
An approachable online environment for discovering quantum computing.</li>
</ul>
...just to name a few.
<br/>
<br/>
If you have questions or comments
about running these book samples, the authors would love to hear from you
at <b><a href="mailto:octopus@qcengine.com">octopus@qcengine.com</a></b>.
</div>
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<h5 class="modal-title" id="CheatSheet_runModalLabel">QCEngine Command Cheat Sheet</h5>
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</button>
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This sheet provides a quick-reference for most common QCEngine commands.
The best way to become familiar with QCEngine commands is to try running the book
samples in this page.
If you find things missing or unclear, the authors would love to hear from you
at <b><a href="mailto:octopus@qcengine.com">octopus@qcengine.com</a></b>.
<br/>
<br/>
<b>"qc." Commands:</b> Commands such as <code>qc.reset()</code> and <code>qc.cnot(t,c)</code> execute
using a quantum computation simulator. In most cases, they take a <b>target mask</b> and a <b>condition mask</b>,
to specify which qubits the instructions act on. Some commands also take a rotation angle.
<br/>
<br/>
<b>Qubit Masks:</b> Qubits are be specified using an integer, where each bit corresponds to one of the
qubits in the quantum computer.
<br/>
<br/>
(...this is under sonstruction)
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<h5 class="modal-title" id="AddEngine_runModalLabel">Add new engines and samples!</h5>
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<span aria-hidden="true">×</span>
</button>
</div>
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<b>Have a favorite quantum simulator, or even a real QPU?</b>
<br/>
We'd love to add your sample code here.
<br/>
<br/>
Providing these samples for as many systems as possible helps our readers, so please contact us
at <b><a href="mailto:octopus@qcengine.com">octopus@qcengine.com</a></b>.
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<div class="modal-body">
The Qiskit versions of examples in this book are written in Python, designed to run
as Qiskit notebooks, at <a href="https://qiskit.org" target="_blank">https://qiskit.org</a>.
<br/><br/>
Qiskit is an open-source software development kit (SDK) for working with OpenQASM and the
IBM Q quantum processors. Create quantum computing programs, compile, and execute them online
in a real quantum processors.
<br/><br/>
To run this sample, go to the Qiskit site and create a new notebook, and then paste this
sample code into it.
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<button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-success" onclick="window.open('https://qiskit.org', '_blank');">Go to Qiskit.org</button>
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<div class="modal fade" id="QASM_runModal" tabindex="-1" role="dialog" aria-labelledby="QASM_runModalLabel" aria-hidden="true">
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The OpenQASM versions of examples in this book are designed to run
using the <b>IBM Q Experience Quantum Composer</b>, at <a href="https://quantum-computing.ibm.com" target="_blank">https://quantum-computing.ibm.com</a>.
<br/><br/>
The <b>Quantum Composer</b> is a graphical user interface for programming a quantum processor.
<br/><br/>
To run this sample, go to the Q Experience site and create new circuit using the Circuit Composer,
then paste the code into the Circuit Editor.
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-success" onclick="window.open('https://quantum-computing.ibm.com', '_blank');">Go to IBM Q Experience</button>
</div>
</div>
</div>
</div>
<div class="modal fade" id="QSharp_runModal" tabindex="-1" role="dialog" aria-labelledby="QSharp_runModalLabel" aria-hidden="true">
<div class="modal-dialog" role="document">
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<h5 class="modal-title" id="QSharp_runModalLabel">Running Q# Sample Code</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
The Q# (pronounced "Q Sharp") versions of examples in this book are designed to run
using the <b>Microsoft QDK</b>, at <a href="https://www.microsoft.com/en-us/quantum/development-kit" target="_blank">https://www.microsoft.com/en-us/quantum/development-kit</a>.
<br/><br/>
Q# is a quantum-focused programming language with native type, operators, and other abstraction.
<br/><br/>
To run this sample, go to the QDK site and create a new IQ# Notebook, and then paste this
sample code into it.
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-success" onclick="window.open('https://www.microsoft.com/en-us/quantum/development-kit', '_blank');">Go to QDK Website</button>
</div>
</div>
</div>
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