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originally posted by: Grenade
a reply to: Phantom423
Again, that's theorem, proven only on a blackboard with zero observational science or direct measurement.
originally posted by: Grenade
a reply to: Phantom423
Feel free to provide a singular example.
originally posted by: Grenade
a reply to: Phantom423
Again, that's theorem, proven only on a blackboard with zero observational science or direct measurement.
originally posted by: Grenade
a reply to: Phantom423
I asked you for an example of a device which can detect Gravitons, not a theory on how Gravitons interact with our universe.
originally posted by: Grenade
a reply to: Phantom423
Exactly.
Experimental observation
Unambiguous detection of individual gravitons, though not prohibited by any fundamental law, is impossible with any physically reasonable detector.[19] The reason is the extremely low cross section for the interaction of gravitons with matter. For example, a detector with the mass of Jupiter and 100% efficiency, placed in close orbit around a neutron star, would only be expected to observe one graviton every 10 years, even under the most favorable conditions. It would be impossible to discriminate these events from the background of neutrinos, since the dimensions of the required neutrino shield would ensure collapse into a black hole.[19]
LIGO and Virgo collaborations' observations have directly detected gravitational waves.[20][21][22] Others have postulated that graviton scattering yields gravitational waves as particle interactions yield coherent states.[23] Although these experiments cannot detect individual gravitons, they might provide information about certain properties of the graviton.[24] For example, if gravitational waves were observed to propagate slower than c (the speed of light in vacuum), that would imply that the graviton has mass (however, gravitational waves must propagate slower than c in a region with non-zero mass density if they are to be detectable).[25] Recent observations of gravitational waves have put an upper bound of 1.2×10−22 eV/c2 on the graviton's mass.[20] Astronomical observations of the kinematics of galaxies, especially the galaxy rotation problem and modified Newtonian dynamics, might point toward gravitons having non-zero mass.[26][27]
originally posted by: Grenade
a reply to: Phantom423
Exactly.
Angular momentum based graviton detector
J. P. M. Pitelli and T. Rick Perche
Phys. Rev. D 104, 065016 – Published 21 September 2021
Article has an altmetric score of 2
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ABSTRACT
We show that gravitons with energy
E
<
Ω
, where
Ω
is the energy gap a localized nonrelativistic system, can be detected by finite-time interactions with a detector. Our detector is based on a quadrupole moment interaction between the hydrogen atom and the gravitational field in the linearized approximation. In this model, the external agent responsible for switching the interaction on an off inputs energy into the system, which creates a nonzero excitation probability even when the field is in the vacuum state. However, when the gravitational field is in a one-particle state with angular momentum, we obtain excitations due to the field’s particle content. These detector excitations are then associated with the detection of gravitons. We also discuss a possible physical realization of our model where the electromagnetic field plays the role of the external agent.
I never tried to prove or disprove a god or any supernatural creature. I have no evidence for or against the existence
of supernatural creatures. No evidence = no science.
originally posted by: Grenade
a reply to: Phantom423
Did you just bolster my idea that Gravity is a fictitious force and then criticize me for leading you to that revelation?
"Unambiguous detection of individual gravitons, though not prohibited by any fundamental law, is impossible with any physically reasonable detector."
originally posted by: Grenade
a reply to: cooperton
"It's ok tho, all i need to confirm my scientific beliefs are a detector with the mass of Jupiter and to place it in orbit around a neutron star. Then i'll be able to prove i'm right if i get lucky with 10 years of data."
Yeah, real observational science right there.
originally posted by: Grenade
a reply to: Phantom423
Did you just bolster my idea that Gravity is a fictitious force and then criticize me for leading you to that revelation?
If gravity can't be measured or observed then it resides in the realm of belief.
My academic qualifications are from a physics background, based on this conversation they're far more pertinent than your own experience.
originally posted by: Saloon
a reply to: Phantom423
I never tried to prove or disprove a god or any supernatural creature. I have no evidence for or against the existence
of supernatural creatures. No evidence = no science.
No evidence according to your obvious bias. As for me, our existence
being absolutely dependent on exactly the right planet provisioned with
all the life supporting systems we need to survive. Temperature sustanence
oxygen to breathe water. Those requirements are miniscuel in comparison
to the full scope of what is needed to support life on this planet. You think
you can just ignore the timing of it all. Blatently ignoring the obvious
cognition and super intelligence responsible for everything we;ve
been provided?
Just a random thoughtless occurrence of chance with no intention
or purpose. I;m sorry but if that's what you suggest it looks far
more ridiculous then anything you can ridicule me for suggesting.
You wont even acknowledge the miracle of life we are experiencing
with or with out a supreme being. Either way it's 100% miraculous.
But nothing for you to be thankful for.
originally posted by: Grenade
a reply to: Phantom423
The relevant adjectives in your quote which you should consider in re-assessment are "model" and "approximation".
originally posted by: Grenade
a reply to: Phantom423
en.wikipedia.org...
"The notion of "fictitious force" arises in Einstein's general theory of relativity.[24][25] All fictitious forces are proportional to the mass of the object upon which they act, which is also true for gravity.[26][27] This led Albert Einstein to wonder whether gravity could be modeled as a fictitious force. He noted that a freefalling observer in a closed box would not be able to detect the force of gravity; hence, freefalling reference frames are equivalent to inertial reference frames (the equivalence principle). Developing this insight, Einstein formulated a theory with gravity as a fictitious force, and attributed the apparent acceleration due to gravity to the curvature of spacetime. This idea underlies Einstein's theory of general relativity. See the Eötvös experiment."
Einstein seems to agree with me at least. I'll take his word above your own.