Book Image

Dancing with Python

By : Robert S. Sutor
Book Image

Dancing with Python

By: Robert S. Sutor

Overview of this book

Dancing with Python helps you learn Python and quantum computing in a practical way. It will help you explore how to work with numbers, strings, collections, iterators, and files. The book goes beyond functions and classes and teaches you to use Python and Qiskit to create gates and circuits for classical and quantum computing. Learn how quantum extends traditional techniques using the Grover Search Algorithm and the code that implements it. Dive into some advanced and widely used applications of Python and revisit strings with more sophisticated tools, such as regular expressions and basic natural language processing (NLP). The final chapters introduce you to data analysis, visualizations, and supervised and unsupervised machine learning. By the end of the book, you will be proficient in programming the latest and most powerful quantum computers, the Pythonic way.
Table of Contents (29 chapters)
Part I: Getting to Know Python
PART II: Algorithms and Circuits
PART III: Advanced Features and Libraries
Other Books You May Enjoy
Appendix C: The Complete UniPoly Class
Appendix D: The Complete Guitar Class Hierarchy
Appendix F: Production Notes

11.6 Searching over two qubits

Go back and look at Figure 11.7. What does this tell you about how many iterations you need for finding one item among four and the probability of your success?

# Set the drawing options
draw_kwargs = {
  "output": "mpl",         # use matplotlib
  "initial_state": True,   # show |0> and 0
  "idle_wires": False,     # don't show unused wires

  "style": {
      "name": "bw",        # black-and-white for book
      "subfontsize": 9,    # font size of subscripts
      "dpi": 600           # image resolution

Let’s build the complete circuit to locate |11⟩. We use Qiskit to create a 2-qubit circuit and place the qubits in superposition with two Hadamard H gates.

circuit = QuantumCircuit(2)