Symbol in context

$\hat A$

This entry links every published equation using this exact notation. Its meaning may change between equations.

Meanings in context

Article-grounded definition

the weak value of any observable.

\hat A

the weak value of any observable.

A_w = \frac{\langle f|\hat A|\psi\rangle}{\langle f|\psi\rangle},

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.

\hat A

the weak value of any observable.