- #1
KallaNikhil
If we were to able to detect gravitons then is it not that the basic assumption over which the general theory of relativity is flawed ?
KallaNikhil said:If we were to able to detect gravitons
And we have no idea how to build a detector sensitive enough to see individual gravitons (unless there are extra dimensions or similar things).PeterDonis said:Note that we have not detected gravitons
Yes, I liked this paper on graviton detection: https://arxiv.org/abs/gr-qc/0601043mfb said:And we have no idea how to build a detector sensitive enough to see individual gravitons (unless there are extra dimensions or similar things).
Yeah, he is assuming we stay in the solar system, and that there do not happen to be any unusually close PBH.mfb said:An interesting paper. I'm a bit puzzled by the assumptions made there (e. g. to get equation 6.2). A Jupiter-sized detector is perfectly fine, but we can't get it closer than 100,000 light years to a black hole? Build it around the primordial black hole and you get R=100,000 km, a factor 1013 closer, or 1026 higher detection rate. Alternatively, you get the same detection rate with just 20 kg of detector material. The neutrino background stays a problem, of course.
The assumption that the detector readout happens at the surface of the Jupiter-sized detector only (p16) is odd as well.
Gravitons are hypothetical particles that are believed to be the carriers of the gravitational force. They are predicted by certain theories, such as quantum field theory, but have yet to be directly detected and confirmed.
Currently, there is no direct way to detect gravitons. Scientists are working on developing experiments and technologies that can detect their effects, such as gravitational waves, which are ripples in spacetime caused by the movement of massive objects.
Detecting gravitons is challenging because they are predicted to have very low energies and interact very weakly with matter. This makes it difficult to detect their effects and distinguish them from other background noise.
If gravitons are detected, it would provide strong evidence for the existence of quantum gravity and could potentially challenge the current understanding of gravity as described by general relativity. It could also help reconcile the inconsistencies between general relativity and quantum mechanics.
Yes, there are several experiments and technologies being developed to detect gravitons, such as the Laser Interferometer Gravitational-Wave Observatory (LIGO) and the proposed Laser Interferometer Space Antenna (LISA). These experiments use advanced instruments to detect and measure gravitational waves, which could indirectly confirm the existence of gravitons.