Timeline for Is there a physical reason that fields in QFT are globally defined?
Current License: CC BY-SA 4.0
13 events
| when toggle format | what | by | license | comment | |
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| Jun 6, 2020 at 15:24 | comment | added | Tom Copeland | Relevant article: “Quantization is a mystery” by Ivan Todorov: "Sect. 5 provides a review of second quantization and its mathematical interpretation. We point out that the treatment of (nonrelativistic) bound states requires going beyond the neat mathematical formalization of the concept of second quantization.". arxiv.org/abs/1206.3116 | |
| Jun 6, 2020 at 13:44 | comment | added | md2perpe | There are some papers targeted to mathematicians, e.g. Introduction to Quantum Field Theory for Mathematicians by Sourav Chatterjee. | |
| Jun 6, 2020 at 3:53 | history | became hot network question | |||
| Jun 6, 2020 at 2:11 | vote | accept | Dmitry Vaintrob | ||
| Jun 5, 2020 at 22:34 | review | Close votes | |||
| Jun 9, 2020 at 18:54 | |||||
| Jun 5, 2020 at 22:14 | answer | added | Igor Khavkine | timeline score: 10 | |
| Jun 5, 2020 at 21:42 | comment | added | Michael Engelhardt | A priori, it's neither clear what state you should be expanding about, nor what class of excitations you should be expanding in. You have to give your theory enough freedom to determine those things dynamically. In general, the vacuum will be nontrivial, and the excitations will be collective objects, not the "particles" whose wave functions you started out with. | |
| Jun 5, 2020 at 21:30 | comment | added | Willie Wong | In case I am not the only one who got confused by what @Qfwfq meant by "S.'s equation" for more than a few minutes: S. is Schroedinger. | |
| Jun 5, 2020 at 21:04 | comment | added | Qfwfq | (I took the liberty of adding the imaginary unit in S.'s equation, so our hamiltonians are self-adjoint) | |
| Jun 5, 2020 at 21:03 | history | edited | Qfwfq | CC BY-SA 4.0 |
(minor nitpick: the imaginary unit, cause $H$ self-adjoint and $\exp(-itH)$ unitary)
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| Jun 5, 2020 at 20:33 | comment | added | Aaron Bergman | You’ve got it backwards. The globally defined (on spacetime) interacting fields are the fundamental object. Fock space is something that only shows up in a free field theory. | |
| Jun 5, 2020 at 20:08 | history | edited | Dmitry Vaintrob |
added functional analysis tag
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| Jun 5, 2020 at 19:52 | history | asked | Dmitry Vaintrob | CC BY-SA 4.0 |