Quantum computers are a type of computer that uses quantum-mechanical phenomena, such as superposition and entanglement, to perform operations on data. They are different from classical computers, which use bits to store and process information. Instead, quantum computers use quantum bits, or qubits.
One of the key features of quantum computers is that they can be in multiple states at the same time, whereas classical computers can only be in one state at a time. This property, known as superposition, allows quantum computers to perform certain types of calculations much faster than classical computers.
Another important feature of quantum computers is entanglement, which means that the state of one qubit can be correlated with the state of another qubit, even if they are separated by large distances. This allows quantum computers to perform certain types of calculations that are not possible on classical computers.
Quantum computers are still in the early stages of development, and they are not yet able to perform all the tasks that classical computers can. However, they have the potential to solve certain types of problems much faster than classical computers, and they may be able to solve problems that are currently unsolvable by any known means.