This tag is for Heisenberg quantum mechanical uncertainty principle.

This tag is for Heisenberg uncertainty principle in quantum mechanics. For uncertainty in a non-quantum measurement, please use instead.

The Heisenberg Uncertainty Principle states that $\sigma_x\sigma_p\geq\frac{\hbar}2$. This comes from the non-commutativity of matrix multiplication in Heisenberg & Pauli's matrix mechanics.

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