Lecture 2: What is a Qubit?

Introduction to Quantum Computing

You are introduced to qubits and the mathematical tools needed to work with them. Dirac notation is a powerful calculational tool to analyze quantum circuits, and perform linear algebraic manipulations more generally. You will learn about quantum measurement and what it means to “look at” a qubit. Topics covered include:

• Quantum Information
• Quantum States
• Dirac Notation
• Quantum Gates

Information is not physical: or, what is a qubit? (13:09 minutes)

Dirac: Would the real quantum bit please stand up (14:36 minutes)

Change a qubit, save the world (11:42 minutes )

Born to rule: or, how do you look at a qubit? (10:57 minutes)

How to write everything in Dirac notation ()