Are Vacuum Fluctuations and QM Connected in Feynman Diagrams?

[TrickyDicky]

How are internal lines with no free ends of Feynman diagrams of the perturbative expansion of QFT related to the quantum tunnelling barrier's negative kinetic energy and the HUP of QM? (if they are related at all)

 

[TrickyDicky]

Not a clue anyone?
Maybe quantum tunnelling is considered not mainstream?

 

[tom.stoer]

Good question.

I have to look for a paper from Jaffe which explains that vacuum bubble diagrams (w/o external lines) for the Casimir effect are an "effective limit" of standard 1st order diagrams with external lines for van-der-Waals forces. If this reasoning could be used in general than vacuum bubbles might be irrelevant.

 

[TrickyDicky]

Good question.

I have to look for a paper from Jaffe which explains that vacuum bubble diagrams (w/o external lines) for the Casimir effect are an "effective limit" of standard 1st order diagrams with external lines for van-der-Waals forces. If this reasoning could be used in general than vacuum bubbles might be irrelevant.

In fact my question wasn't restricted to vacuum bubbles diagrams, I was referring to virtual particles in general.
Vacuum bubbles are irrelevant (cancel) when calculating correlation functions.

 

[sheaf]

Good question.

I have to look for a paper from Jaffe which explains that vacuum bubble diagrams (w/o external lines) for the Casimir effect are an "effective limit" of standard 1st order diagrams with external lines for van-der-Waals forces. If this reasoning could be used in general than vacuum bubbles might be irrelevant.

You mean http://arxiv.org/abs/hep-th/0503158" ?

 

[tom.stoer]

You mean http://arxiv.org/abs/hep-th/0503158" ?

exactly, thanks!