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Vacuum Energy Measurements Q


EdEarl

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Wikipedia

Vacuum energy is an underlying background energy that exists in space throughout the entire Universe.

Clearly the vacuum energy has not been measured everywhere. Can I assume the vacuum energy is more or less constant everywhere, or is it possible some places have a different vacuum energy than other places?

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You can reduce the vacuum energy in small gaps between conductive surfaces. That gives rise to the Casimir force. But otherwise, being the same everywhere seems to be a reasonable assumption. Pointless, in a way, since you can't tap into it.

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It depends on the system. For example a vacuum has a pressure gradient near sources of mass.

 

However on sufficiently large enough scales it uniform in distribution.

 

Ie there is no pressure gradient on cosmological scales.

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