Quantum coupling is an effect in
quantum mechanics
Quantum mechanics is a fundamental theory in physics that provides a description of the physical properties of nature at the scale of atoms and subatomic particles. It is the foundation of all quantum physics including quantum chemistry, ...
in which two or more quantum systems are bound such that a change in one of the
quantum states
In quantum physics, a quantum state is a mathematical entity that provides a probability distribution for the outcomes of each possible measurement in quantum mechanics, measurement on a system. Knowledge of the quantum state together with the rul ...
in one of the systems will cause an instantaneous change in all of the bound systems. It is a state similar to
quantum entanglement
Quantum entanglement is the phenomenon that occurs when a group of particles are generated, interact, or share spatial proximity in a way such that the quantum state of each particle of the group cannot be described independently of the state of ...
but whereas quantum entanglement can take place over long distances quantum coupling is restricted to quantum scales.
Quantum mechanics
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