A Lesson On Single-Qubit Quantum Gates (Part 2)
Learn about all the important Phase gates used in Quantum algorithms in this lesson.
We discussed the Identity, Pauli, and Hadamard gates in last week's lesson.
This week, we will move forward and learn about Phase gates.
In case you missed the previous lessons on Quantum gates, here are the links for them:
Let’s get started!
4. Phase Gates
These are quantum gates that act to change the phase of a qubit’s state without changing its probabilities.
These gates apply a relative phase shift to the qubit's state.
The general form of a phase gate is represented by the following matrix:
This tells that a phase gate applies a phase e^(iθ) to |1> component of a qubit, while leaving the |0> component unchanged.
The following phase gates are important to know about:
Z gate
S gate
S† gate
T gate
T† gate
Z gate
