Qubits

Qubits, or quantum bits, are the fundamental units of information in quantum computers. Unlike classical bits that are either 0 or 1, qubits can exist in a superposition, meaning they can be both 0 and 1 simultaneously until measured. This property, along with entanglement—where qubits become linked so the state of one instantly influences another—allows quantum computers to perform complex calculations more efficiently than traditional computers for certain problems. Qubits are typically realized using particles like electrons or photons, and their unique quantum states enable new types of computational power.