Definition: In statistical physics, a superpurity is a quantum mechanical concept that describes the tendency of a system to become more or less stable as its energy is increased. It can be defined as a state where the total energy of the system is maximized without any net external force acting on it. A superpurity is often used in the context of quantum computing and quantum information theory, where it represents a potential point at which a quantum computer could achieve near-optimality in terms of computational power.
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