is a minute portion of matter or another term for subatomic particle or smaller than an atom. Quantum particles can be a particle or a wave. The particle is what is actually observed, while the wave function serves merely to guide the particle. Physicists can prepare a wave function so they know it exactly, but can only learn about the hidden variables by observing the wave.

S**uperposition** is a single system so it is never **entangled**.

Quantum **entanglement** is known to be the exchange of quantum information between two particles at a distance. is a physical phenomenon that occurs when pairs or groups of particles are generated, interact, or share spatial proximity in ways such that the **quantum** state of each particle cannot be described independently of the state of the others, even when the particles are separated by a large distance.

Quantum **superposition** is known to be the uncertainty of a particle (or particles) being in several states at once (which could also involve the exchange of quantum information for a particle that is known to be in several locations simultaneously

An entangled superposition. In each part of the superposition, the object has a definite measurement outcome and the observer has measured that outcome.