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The action is the integral of the Lagrangian over time, or the integral of the Lagrangian Density over both time and space.

2 votes
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178 views

path integrals: how/why can the phase be identified with the action?

\text{phase}} $ Then, it happens that the phase could be identified with the action. But I have not understood how this could be done ... Could anyone clarify that point? Thanks in advance. …
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21 votes
3 answers
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The Planck constant $\hbar$, the angular momentum, and the action

Is there anything interesting to say about the fact that the Planck constant $\hbar$, the angular momentum, and the action have the same units or is it a pure coincidence? …
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