Equation 31 · Part 6 · The Clock That Comes Back Wrong by Exactly Its Mass

multiplication

X=-i\mathbf b\cdot\mathbf P/\hbar

multiplication

What this part means

Multiply the quantities on either side.

Its job in the formula

Multiply the quantities on either side.

Full expressionmultiplicationArticle meaning

The passage around this formula

That triviality is what makes the loop phase exact rather than approximate. Write X=-i $\mathbf b$ $\cdot$ $\mathbf P$ / $\hbar$ and Y=-i $\mathbf v$ $\cdot$ $\mathbf K$ / $\hbar$ . Their commutator is

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Learn the underlying idea

Multiplication scales one quantity by another. A dot, a cross, or adjacent symbols can indicate a product.

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