3 ms·
I'm a total illiterate in this context, so forgive the possibly stupid question, but the antenna analogy brought this to mind: is there any effect similar to he
by squarefoot 7y ago
I'm a total illiterate in this context, so forgive the possibly stupid question, but the antenna analogy brought this to mind: is there any effect similar to heterodyning with respect to gravitational waves like we have in the electromagnetic ones? If yes, could some signals have been already recorded but elsewhere in the spectrum because they're the result of sum and/or subtraction with other known signals?
- lutorm 7y agoAs far as I understand, that effect is just a result of the superposition characteristic of waves in general, so yeah it should also apply to gravitational waves. I think the difference is that there aren't a lot of sources of "carriers" in the gravitational wave universe.
- acjohnson55 7y agoThe heterodyne effect comes from multiplication of signals. But you really just need to pass their superposition through a nonlinearity, because the Taylor series expansion will typically have an early term with the multiplication of the two signals' frequencies with a high coefficient. Of course, you'll have lot of artifacts from all the other terms of the expansion, but you can use a bandpass filter to drop all the unwanted terms. Or so I think I remember. It's been a while.
- jessriedel 7y agoThere are no other devices capable of detecting spatial vibrations at the level of sensitivity required (strain of 1 part in 10^21).