Recent content by Rake

according to gr space-time can contain no radiation or matter but still have energy stored in its curvature. According to QM it is possible for random quantum fluctuations to spontaneously effect a negative or positive curvature within the metric. Einstein's conservation law is not violated...

From what I understood there is the motion of actual space as it "stretches" and "drags" any embedded objects along with it. General Relativity attributes this expansion in part to a non-zero vacuum energy. Then there is relative motion of an object as it moves through local space. When...

The first sentence states that the position of the photon at detector D0 has been registered. And I think that this never changes. What changes is the position of the photon ARRIVING at D0. MEANING that once the twin idler info has been gleaned, then the experimenter will be able to say...

If wiki is correct then this would mean that an experiment can be devised such that a future event can change the past. So for example, let's say that the experiment is changed so that the paths to the idler detectors D1,D2,D3,D4 are stretched out by 1 light year. Then would this would...

I think the paper is saying that without information from the future there are some features of past events that they are not privy to. Non-local interpretations would predict or account for this as well.

I think that the paper answers your question in the very last concluding paragraph. It states: So the position at D0 is registered at T2 and this never changes. However, until you have the twin idler info at >T2, you have no information of how the twin signal got to D0. So the...

Thanks very much for clearning that up Carl. I think that much of my confusion, as you managed to pinpoint, comes from my lack of physics background, which amounts to a couple of university classes 10 years ago... Your thoughts actually reminded me of something that a prof told me which I...

In the macro, non-relativistic world, let's say that the present is the interval that separates the future from the past. And that this is an analogy for the interval within which the probability waves in a region in space collapse into particulate matter resulting in a measurable event which...

forgive me if I am mistaken, however does the principle of entanglement not imply that there is some kind of unobservable physical system that connects particles and if so does this not also imply that causality is not the final say on what we can ultimately glean from "reality" (whatever that...

I was not aware of this and to your point it would be disheartening if the inflationary model were to depend on a set of precise conincidences much like the classical model was dependent on the precise value of the ATB critical density...ughh!

Hi Garth, thanks again for the link, its going to take me a bit of time to go through the entire thread, but I am going to have fun trying :) ...I was thinking about what you said earlier: And this made me wonder how it is possible that the cosmic acceleration will eventually revert back to a...

Thank you very much Garth...I will start there!

Thanks for the quick reply Garth! Is it then safe to assume that the current popular post bang model (that shows the rate of expansion decreasing until a few billion years after the bang and then progressively increasing after that point) is based on the current notions wrt the cosmological...

Is it reasonable to assume that if there are areas of space that are causally disconnected from us because they are receding at superluminal velocities then there must be galaxies that we cannot observe? And if this can be assumed then how do cosmologists estimate that the matter in the...

because that is the only way other than direct observation that string, or any other theory for that matter, is able to make the leap from philosophy to physics or more to your point from math to science.