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Judith
Post  Post subject: What are -time-dependent gravitational fields-?  |  Posted: Wed Dec 14, 2016 12:36 am
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Joined: Thu Sep 29, 2016 3:09 pm
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the partial quote is :
... Minkowski space quantum field theory to curved spacetime. A general prediction of this theory is that particles can be created by time-dependent gravitational fields (multigraviton pair production),


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PhDemon
Post  Post subject: Re: What are -time-dependent gravitational fields-?  |  Posted: Wed Dec 14, 2016 1:05 am

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I'm no expert on this but the simple answer to your question is that a time-dependent gravitational field is a gravitational field that is not constant but changes with time. Off the top of my head (may be rubbish, hopefully janus or another physicist can confirm) this could be due to a black hole increasing in mass and so its gravitational effects become stronger or a mass moving, as it's centre of mass changes position it will change the strength of the gravitational field in the area around it.

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