Timeline for Has the spontaneous forming of matter been observed?
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 1, 2016 at 18:44 | vote | accept | G. Bach | ||
| Jan 29, 2016 at 14:54 | comment | added | dmckee --- ex-moderator kitten | I find too much emphasis on phrases like "virtual (anti)particles that are a computational device" ends up creating the opposite misconception that too literal interpretation of the Feynman diagram method does: one of under appreciating the physical meaning of those terms. Individual terms can be selected and made physical under the right circumstance in when we "knock a pair on-shell" in processes like highly forward pion production in $p(e,e')$ scattering. Yes, the terms of the series are math, but it's math that has physical meaning and can be accessed in the laboratory. | |
| Jan 29, 2016 at 14:38 | comment | added | user46925 | It seems that the question follows the paradigm of creation of matter from the dark energy, populated in some magazines , lectures and publications. ie on arxiv : "Particle creation has been considered as a possible justification for the accelerated expansion of the universe, obeying the second law of thermodynamics, together with the possible existence of Dark Energy." Accelerated Expansion of the universe based on Particle Creation-Destruction Processes and Dark Energy in FLRW universes by Alberto C. Balfagon | |
| Jan 29, 2016 at 14:21 | comment | added | John Rennie | As far as I know we have never observed real (not virtual) particles appearing from the vacuum. An example would be Hawking radiation, but this remains a theoretical prediction and has never been observed - though optical analogues have. | |
| Jan 29, 2016 at 13:41 | comment | added | G. Bach | Thanks, is there anything to be found about actual particles appearing? Having no education in physics to speak of, I would expect that since the causes cited in that answer ("existence of quantum fields and the laws that govern them") have been in place for ages, if matter can form spontaneously, it would have been observed, or otherwise a reason why it hasn't. | |
| Jan 29, 2016 at 13:01 | history | answered | John Rennie | CC BY-SA 3.0 |