Puriya by Ciro Santilli 40 Updated 2025-07-16
Video 1.
Raag Puriya Dhanashri performed on the Sitar by Shahid Parvez
. Source.
Some authors use the convention of:
Controlled quantum gates are gates that have two types of input qubits:
These gates can be understood as doing a certain unitary operation only if the control qubits are enabled or disabled.
The first example to look at is the CNOT gate.
Figure 1. . Source.
The black dot means "control qubit", and "U" means an arbitrary Unitary operation.
When the operand has a conventional symbol, e.g. the Figure "Quantum NOT gate symbol" for the quantum NOT gate to form the CNOT gate, that symbol is used in the operand instead.
Pauli-X gate by Ciro Santilli 40 Updated 2025-07-16
The quantum NOT gate swaps the state of and , i.e. it maps:
As a result, this gate also inverts the probability of measuring 0 or 1, e.g.
Hadamard gate by Ciro Santilli 40 Updated 2025-07-16
The Hadamard gate takes or (quantum states with probability 1.0 of measuring either 0 or 1), and produces states that have equal probability of 0 or 1.
WormWideWeb by Ciro Santilli 40 Updated 2025-07-16
wormwideweb.org/
Browse freely moving whole-brain calcium imaging datasets
The Oxford mathematics Moodle has detailed course listings, and most PDFs are not paywalled.
E.g. the 2024 course:

There are unlisted articles, also show them or only show them.