Quantum Circuits

What are quantum circuits?

So, in a way, you can think of quantum circuits as the composers of the quantum world, creating new and exciting computations that were once impossible.

It's a sequence of instructions that tell the qubits how to interact with each other and with the outside world, in order to perform a specific calculation or operation.

Quantum circuits are used in quantum computers to perform calculations that are beyond the reach of classical computers. A quantum circuit can create different computations by rearranging the qubits and the instructions.

They cautiously entered the lab, their weapons at the ready. The air was thick with the stench of decay, and strange noises echoed through the cavernous space. Finally, they reached the dark, musty prison where Ray was being held captive. The sight of his emaciated body sent a chill down Red's spine.

A quantum gate or quantum logic gate is a quantum circuit operating on qubits.

They like the classical logic gates for conventional digital computers. However, quantum logic gates are reversible, unlike many classical logic gates.

They can use the spin of the electron – which can point up or down – as a qubit. Spin qubits have been made from tiny pieces of semiconductor called quantum dots, and quantum-logic devices have been made by coupling these qubits together.

Experimenting with Quantum Circuits

The image below is from my early experimentation and tinkering with IBM Quantum Composer.