theorems:haags_theorem
| Both sides previous revision Previous revision Next revision | Previous revision | ||
|
theorems:haags_theorem [2018/01/02 14:17] jakobadmin ↷ Page moved from advanced_notions:quantum_field_theory:haags_theorem to theorems:haags_theorem |
theorems:haags_theorem [2019/05/08 15:48] (current) jakobadmin [Abstract] |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| ====== Haag's theorem ====== | ====== Haag's theorem ====== | ||
| - | <tabbox Why is it interesting?> | ||
| - | <blockquote>According to something called Haagís theorem there appears to be no known | ||
| - | consistent formalism within which interacting quantum field theory can be | ||
| - | expressed. | ||
| - | <cite>p. 115 in "An interpretative | + | <tabbox Intuitive> |
| - | introduction to quantum Field theory" by Teller (1995) </cite> | + | |
| - | </blockquote> | + | |
| - | + | ||
| - | <tabbox Layman> | + | |
| <note tip> | <note tip> | ||
| Line 17: | Line 9: | ||
| </note> | </note> | ||
| | | ||
| - | <tabbox Student> | + | <tabbox Concrete> |
| For the best explanation, see the section "How to stop worrying about Haag's theorem" in the book "The Conceptual Framework of Quantum Field Theory" by A. Duncan | For the best explanation, see the section "How to stop worrying about Haag's theorem" in the book "The Conceptual Framework of Quantum Field Theory" by A. Duncan | ||
| - | <tabbox Researcher> | + | <tabbox Abstract> |
| - | <note tip> | + | <blockquote>In particular Haag's theorem, that one |
| - | The motto in this section is: //the higher the level of abstraction, the better//. | + | cannot consistently define the vacuum in interacting theories, is now considered to have been the wrong way to look |
| - | </note> | + | at the problem, and largely disappears with considerations of RG flow.<cite>[[http://www.felixflicker.com/pdf/QFT_notes_F_Flicker.pdf|A Practical Introduction to Quantum Field Theory]] by Felix Flicker</cite></blockquote> |
| + | <tabbox Why is it interesting?> | ||
| - | --> Common Question 1# | + | <blockquote>According to something called Haagís theorem there appears to be no known |
| + | consistent formalism within which interacting quantum field theory can be | ||
| + | expressed. | ||
| - | + | <cite>p. 115 in "An interpretative | |
| - | <-- | + | introduction to quantum Field theory" by Teller (1995) </cite> |
| + | </blockquote> | ||
| - | --> Common Question 2# | + | <tabbox FAQ> |
| - | + | -->Why is there no problem in practical QFT calculations?# | |
| + | see https://physics.stackexchange.com/questions/3983/haags-theorem-and-practical-qft-computations | ||
| <-- | <-- | ||
| - | | ||
| - | <tabbox Examples> | ||
| - | |||
| - | --> Example1# | ||
| - | |||
| - | |||
| - | <-- | ||
| - | |||
| - | --> Example2:# | ||
| - | |||
| - | |||
| - | <-- | ||
| - | | ||
| - | <tabbox History> | ||
| </tabbox> | </tabbox> | ||
theorems/haags_theorem.1514899067.txt.gz · Last modified: 2018/01/02 13:17 (external edit)
Page Tools
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Share Alike 4.0 International
