# Tutorial 2 - manipulating qubit states using qutip

### "QuTiP is open-source software for simulating the dynamics of open quantum systems."

In this session, I will teach you how to perform computations on a single qubit. A variety of quantum operations can be utilized to manipulate the states of a qubit. Precise manipulation of qubit states will allow one to perform calculations on quantum computers accurately. This precision combined with speed of computation (or gate operation) defines the clock speed of a quantum processor. This clock speed ultimately determines whether a given quantum computer is going to outperform its classical counterpart in completing certain tasks.

In this context, I will particularly discuss the Bloch sphere representation of a qubit. Bloch sphere is a geometric description of the state of qubits, and is named after the physicist Felix Bloch. Points on the Bloch sphere describe all possible states a qubit can acquire in the course of computation. Check out https://en.wikipedia.org/wiki/Bloch_sphere for more information on it.

We will use a popular quantum dynamics simulation toolkit called qutip to perform computations on a single qubit. I will demonstrate its basic functionalities that allows one to manipulate and subsequently plot the states of a qubit on the Bloch sphere (figure shown below).

Because of demands, we shall conduct this session on zoom. Please join in via this link on 22.04.2021 (Thursday) at 7 PM (Nepali time) :

https://zoom.us/j/99735513295?pwd=UXQ3amZzeXhhU1g1YzBBenZNN3JIdz09

Meeting ID: 997 3551 3295

Passcode: 117508

See you!

Manish

Recording from this session is available here:

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