Calculating persistence current by multiplying probability current and charge density is a proposed method for determining current in a one-dimensional loop with an electron. The classical definition of current focuses on the amount of charge passing a point per unit time, regardless of whether the same charge circulates repeatedly. This approach may be valid for basic calculations, but for more complex analyses, such as time variation or quantum descriptions of charge motion, additional context is necessary. The discussion emphasizes the need to clarify the specific scenario when exploring current in quantum systems. Understanding the relationship between these concepts is crucial for accurate calculations.
