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In QFT, a photon is transmitted through the vacuum by ripping electron positron pairs from the vacuum.
Quote from: flummoxed on 14/07/2019 15:42:31In QFT, a photon is transmitted through the vacuum by ripping electron positron pairs from the vacuum.I think not. You need at least 1.022 MeV to create an e-p pair.The photons I'm looking at right now are about 3 eV.
Virtual particles are mathematical devices used in calculations. They preserve the conservation of energy and momentum. They are the invention of a mathematician. No more and no less.
So according to your scenario photons multiply as they propagate. They all end up as pairs of gamma rays. Which in turn generate more gamma rays.
Quote from: jeffreyH on 14/07/2019 20:31:50Virtual particles are mathematical devices used in calculations. They preserve the conservation of energy and momentum. They are the invention of a mathematician. No more and no less.There is evidence they exist
Quote from: flummoxed on 15/07/2019 09:27:42Quote from: jeffreyH on 14/07/2019 20:31:50Virtual particles are mathematical devices used in calculations. They preserve the conservation of energy and momentum. They are the invention of a mathematician. No more and no less.There is evidence they existGreat. So if that is the case, you should present it to back up your statement.
Quote from: The Spoon on 15/07/2019 17:45:22Quote from: flummoxed on 15/07/2019 09:27:42Quote from: jeffreyH on 14/07/2019 20:31:50Virtual particles are mathematical devices used in calculations. They preserve the conservation of energy and momentum. They are the invention of a mathematician. No more and no less.There is evidence they existGreat. So if that is the case, you should present it to back up your statement.I guess you have heard of the following. Each one you will have to refute to back up your claim virtual particles do not exist in any form. The Casimir effect > HUP > Zero point energy of the vacuum, QFT appears to rest on the virtual particles in the quantum vacuum of space, Hawking radiation relies on the existence virtual particles. etcRead the OP and try to keep your questions on thread
Quote from: flummoxed on 15/07/2019 20:48:29Quote from: The Spoon on 15/07/2019 17:45:22Quote from: flummoxed on 15/07/2019 09:27:42Quote from: jeffreyH on 14/07/2019 20:31:50Virtual particles are mathematical devices used in calculations. They preserve the conservation of energy and momentum. They are the invention of a mathematician. No more and no less.There is evidence they existGreat. So if that is the case, you should present it to back up your statement.I guess you have heard of the following. Each one you will have to refute to back up your claim virtual particles do not exist in any form. The Casimir effect > HUP > Zero point energy of the vacuum, QFT appears to rest on the virtual particles in the quantum vacuum of space, Hawking radiation relies on the existence virtual particles. etcRead the OP and try to keep your questions on threadYou made a claim, the onus is on you to provide evidence. Don't tell people what questions they can ask.
Quote from: The Spoon on 15/07/2019 21:10:25Quote from: flummoxed on 15/07/2019 20:48:29Quote from: The Spoon on 15/07/2019 17:45:22Quote from: flummoxed on 15/07/2019 09:27:42Quote from: jeffreyH on 14/07/2019 20:31:50Virtual particles are mathematical devices used in calculations. They preserve the conservation of energy and momentum. They are the invention of a mathematician. No more and no less.There is evidence they existGreat. So if that is the case, you should present it to back up your statement.I guess you have heard of the following. Each one you will have to refute to back up your claim virtual particles do not exist in any form. The Casimir effect > HUP > Zero point energy of the vacuum, QFT appears to rest on the virtual particles in the quantum vacuum of space, Hawking radiation relies on the existence virtual particles. etcRead the OP and try to keep your questions on threadYou made a claim, the onus is on you to provide evidence. Don't tell people what questions they can ask.Evidence provided, go and look it upI note you never answer questions. Your posts are meaninglessGo and start your own thread to ask questions if you have any.
Now some food for thought. From here https://www.physicsforums.com/insights/misconceptions-virtual-particles/"States involving virtual particles cannot be created since quantum field theory has creation operators only for observable particles whose 4-momentum satisfies the mass-shell constraint. For lack of a state, virtual particles have none of the usual physical characteristics of real particles: They cannot be said to exist in space and time, have no position, no meaningful probabilities to be created or destroyed anywhere, no life-time, cannot cause anything, interact with anything or affect anything. Therefore there is also no dynamics, speed of motion, or world lines. (In physics, dynamics is always tied to states and an equation of motion. Neither exists for virtual particles.)"That sums it up in a nutshell, or off-shell if you prefer. If you wish to argue otherwise feel free to but in new theories.
Are they pulling virtual particle pairs from the vacuum each with energy 255.5eV, and then returning it.