<human>:  What is quantum computing and how does it work?
<bot>: Quantum computing is the use of quantum-mechanical phenomena such as superposition and entanglement to perform computation. A quantum computer is a device that harnesses these phenomena to solve tasks that are difficult or impossible for a classical computer. The most common technique used in quantum computing is known as quantum gates, which manipulates the quantum state of a qubit (a quantum bit) in order to create the necessary computation. Quantum gates can be applied to each qubit in a quantum computer in order to create a desired outcome from the computation.