Timeline for Real Scalar Field: in what sense are the Minkowski modes complete?
Current License: CC BY-SA 4.0
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| Jul 13, 2018 at 19:23 | comment | added | QuantumEyedea | Oops I edited my question; yes I am interested in flat space. Working backwards from your second expression I can write $$\int d^{3}\mathbf{k}\ -i \frac{\partial}{\partial x^0} \left[ u^{\ast}_{\mathbf{k}}(x) u_{\mathbf{k}}(y) + u_{\mathbf{k}}(x) u^{\ast}_{\mathbf{k}}(y) \right] \bigg|_{x^0=y^0} = \delta^{(3)}(\mathbf{x} - \mathbf{y})$$ but I don't understand why this is done. How does this constitute a completeness of the Minkowski modes? | |
| Jul 13, 2018 at 18:11 | history | edited | mike stone | CC BY-SA 4.0 |
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| Jul 13, 2018 at 17:49 | history | answered | mike stone | CC BY-SA 4.0 |