Describing a process that occurs without hysteresis, meaning it doesn't depend on the previous state or history of a system.
From an- (without) + hysteretic (adjective from hysteresis, Greek hystera meaning 'delay'). The term was created to describe systems in physics and materials science where the path doesn't matter, only the present conditions.
Most real systems have hysteresis—they remember what happened before—but anhysteretic processes have amnesia, only caring about current conditions, which is why scientists hunt for these 'clean' systems in quantum computing and magnetics.
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