The features of quantum computing are

Quantum computing is a type of computation that uses quantum bits, or qubits, to encode information as 0s, 1s, or both at the same time. This superposition of states—along with the other quantum mechanical phenomena of entanglement and tunneling—enables quantum computers to manipulate enormous combinations of states at once.

Here are some key features of quantum computing:

1. Superposition: In classical computing, a bit is a single piece of information that can exist in two states – 1 or 0. Quantum computing uses quantum bits, or 'qubits' instead. These are quantum systems with two states. However, unlike a usual bit, they can store much more information than just 1 or 0, because they can exist in any superposition of these values.

2. Entanglement: Particles (qubits) that are entangled can be in a superposition of states, like regular qubits. However, the difference is that the state of one qubit, whether it's 0, 1, or both, will instantly affect the state of the other, no matter how far apart they are. This is a key feature for quantum computing.

3. Quantum Tunneling: Quantum tunneling is another quantum phenomenon that quantum computers take advantage of. It allows particles to pass through barriers that should be insurmountable according to classical physics. This feature can be used in quantum algorithms to reach solutions faster than classical computers.

4. Quantum Gates: Quantum gates are the basic building blocks of quantum circuits. They perform operations on an input qubit or set of qubits, changing their quantum state. These operations can be undone, which is a key difference from classical logic gates.

5. Quantum Speedup: Quantum computers can theoretically solve certain problems much faster than classical computers. This is known as quantum speedup and is a key reason for the interest in quantum computing.

6. Quantum Parallelism: Due to superposition, a quantum computer can process a large number of possibilities at once. This allows it to solve certain problems faster than classical computers.

7. Quantum Cryptography: Quantum computing also has implications for cryptography. Quantum algorithms, like Shor's algorithm, could potentially break many of the cryptographic systems in use today. On the other hand, quantum cryptography could offer new, more secure methods of encryption.