[Physicist]

That is why QED and Relativity don't mix actually.

Er, no. Quantum field theory and General Relativity don't appear to mix because a quantized spin-2 (read: gravitational) field can't be renormalizable (read: finite) in four dimensions. That's a mathematical fact that's independent of the value of the cosmological constant.

Which side are you on out of curiosity?

Extra dimensions. I believe QFT and GR are both correct. There is experimental evidence of the quantized nature of the gravitational field. If all that is the case, it implies that there are more dimensions than the four we measure.

[kinoxi]

Have you seen any realistic results out of string theory? The answer is no. How about M theory? Maybe. I don't believe in making things up. The extra dimensional concepts don't currently work. At all.

[LeGrande]

Could you elaborate more on those two statements? I know I am in way over my head here, but I love trying to figure this stuff out:) Specifically is a field or a wave quantized?

Quantum field theory and General Relativity don't appear to mix because a quantized spin-2 (read: gravitational) field can't be renormalizable (read: finite) in four dimensions.

There is experimental evidence of the quantized nature of the gravitational field.

[betty boop]

Extra dimensions. I believe QFT and GR are both correct. There is experimental evidence of the quantized nature of the gravitational field. If all that is the case, it implies that there are more dimensions than the four we measure.

Fascinating, Physicist! Thank you so much for the informative essay/posts.