quantum field theory

Field transformation under Conformal transformation

I am confused about the field transformation under conformal transformation. Consider the scale transformation of field $\phi$ (not necessarily...
Thread by: craigthone, Mar 17, 2018 at 8:46 PM, 2 replies, in forum: Advanced Physics Homework

A Can disjoint states be relevant for the same quantum system?

In the algebraic approach, a quantum system has associated to it one $\ast$-algebra $\mathscr{A}$ generated by its observables and a state is...
Thread by: leo., Mar 13, 2018 at 3:58 PM, 4 replies, in forum: Quantum Physics

I Two questions about "The Physics of Virtual Particles"

Arnold Neumaier, I have 2 elementary questions about your article “The Physics of Virtual Particles”. 1. In the paragraph headed “States.” on...
Thread by: fox26, Feb 20, 2018, 9 replies, in forum: Quantum Physics

A States in usual QM/QFT and in the algebraic approach

Studying QFT on curved spacetimes I've found the algebraic approach, based on $\ast$-algebras. In that setting, a quantum system has one...
Thread by: leo., Feb 14, 2018, 5 replies, in forum: Quantum Physics

A I want to know the exact problems of Merging GR and QM

This thread is I want a set of experts in the subject to show me the exact math of why Einstein's field Equations along with Special Relativity...
Thread by: VIctor Medvil, Feb 11, 2018, 6 replies, in forum: Beyond the Standard Model
6. Physics and Math Videos

Quantum Fields: The Real Building Blocks of the Universe - with David Tong

According to our best theories of physics, the fundamental building blocks of matter are not particles, but continuous fluid-like substances known...
Uploaded by: Wrichik Basu, Feb 11, 2018, 0 comments, in category: Quantum
7. Physics and Math Videos

Quantum Fields with David Tong - Questions and Answers

According to our best theories of physics, the fundamental building blocks of matter are not particles, but continuous fluid-like substances known...
Uploaded by: Wrichik Basu, Feb 11, 2018, 0 comments, in category: Quantum

Insights Mathematical Quantum Field Theory - Renormalization - Comments

Greg Bernhardt submitted a new PF Insights post Mathematical Quantum Field Theory - Renormalization [ATTACH] Continue reading the Original PF...
Thread by: Urs Schreiber, Feb 8, 2018, 9 replies, in forum: Quantum Physics

Insights Mathematical Quantum Field Theory - Interacting Quantum Fields - Comments

Greg Bernhardt submitted a new PF Insights post Mathematical Quantum Field Theory - Interacting Quantum Fields [ATTACH] Continue reading the...
Thread by: Urs Schreiber, Jan 29, 2018, 3 replies, in forum: Quantum Physics

I Should the energy density of the vacuum be zero?

According to [Dark Energy and the Accelerating Universe](https://ned.ipac.caltech.edu/level5/March08/Frieman/Frieman5.html) quantum field theory...
Thread by: jcap, Jan 21, 2018, 8 replies, in forum: Quantum Physics

Insights Mathematical Quantum Field Theory - Free Quantum Fields - Comments

Greg Bernhardt submitted a new PF Insights post Mathematical Quantum Field Theory - Free Quantum Fields [ATTACH] Continue reading the Original...
Thread by: Urs Schreiber, Jan 13, 2018, 1 replies, in forum: Quantum Physics

Insights Mathematical Quantum Field Theory - Quantization - Comments

Greg Bernhardt submitted a new PF Insights post Mathematical Quantum Field Theory - Quantization [ATTACH] Continue reading the Original PF...
Thread by: Urs Schreiber, Jan 8, 2018, 15 replies, in forum: Quantum Physics

Insights Mathematical Quantum Field Theory - Gauge Fixing - Comments

Greg Bernhardt submitted a new PF Insights post Mathematical Quantum Field Theory - Gauge Fixing [ATTACH] Continue reading the Original PF...
Thread by: Urs Schreiber, Dec 28, 2017, 1 replies, in forum: Quantum Physics

Quantum What is the level of Klauber's Student Friendly QFT?

Hi! I have studied about 70% of the textbook QFT for the Gifted Amateur by Lancaster and Blundell and I think that I am now ready to go to more...
Thread by: Joker93, Dec 21, 2017, 10 replies, in forum: Science and Math Textbooks

Insights Mathematical Quantum Field Theory - Reduced Phase Space - Comments

Greg Bernhardt submitted a new PF Insights post Mathematical Quantum Field Theory - Reduced Phase Space [ATTACH] Continue reading the Original...
Thread by: Urs Schreiber, Dec 18, 2017, 4 replies, in forum: Quantum Physics

Insights Interview with Mathematician and Physicist Arnold Neumaier - Comments

Greg Bernhardt submitted a new PF Insights post Interview with Mathematician and Physicist Arnold Neumaier [ATTACH] Continue reading the...
Thread by: A. Neumaier, Dec 11, 2017, 37 replies, in forum: Quantum Physics

I A question about Zee's book QFT in a nutshell

I have read( even Peter Donis mentioned it) that the derivation of the potential between two particles is not a true QFT, why is that? if not,...
Thread by: ftr, Dec 9, 2017, 4 replies, in forum: Quantum Physics

I In the Casimir effect, can you slide plates unopposed by force?

How would sliding the plates parallel to each other in order to separate them (they are prevented from contacting to avoid friction) require the...
Thread by: Christofer Br, Dec 6, 2017, 2 replies, in forum: Quantum Physics

Insights Mathematical Quantum Field Theory - Gauge symmetries - Comments

Greg Bernhardt submitted a new PF Insights post Mathematical Quantum Field Theory - Gauge symmetries [ATTACH] Continue reading the Original PF...
Thread by: Urs Schreiber, Dec 6, 2017, 17 replies, in forum: Quantum Physics