Required backround for quantum cosmology

Click For Summary

Discussion Overview

The discussion centers on the prerequisites for studying quantum cosmology, particularly focusing on the necessary background in quantum mechanics (QM) and general relativity (GR). Participants explore specific topics and resources that could aid in understanding quantum cosmology, including various theoretical frameworks and mathematical tools.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant expresses a desire to learn about quantum cosmology but feels their background in QM and GR is insufficient.
  • Another participant suggests that knowledge of quantum field theory (QFT) and cosmology is essential, noting that the approach may vary depending on the perspective taken, such as string theory or supergravity.
  • Some participants mention that quantum cosmology generally does not include inflation, prompting questions about specific topics of interest like quantum creation of universes or the multiverse.
  • A participant highlights the importance of understanding instantons and tunneling events in the context of quantum cosmology, linking these concepts to GR and field theory.
  • Several resources, including articles and lecture notes, are shared to assist in building the necessary background knowledge.
  • There is a discussion about the role of geometry and topology in quantum cosmology, with some participants suggesting it may demand more complex geometrical understanding than standard GR.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the specific prerequisites for quantum cosmology, as multiple viewpoints and areas of interest are presented. Some agree on the necessity of QFT and GR, while others suggest additional topics or frameworks may be relevant.

Contextual Notes

Participants express varying levels of familiarity with QFT and cosmology, indicating that individual backgrounds may influence the perceived sufficiency of their knowledge. The discussion reflects a range of interests within quantum cosmology, suggesting that different approaches may require different foundational topics.

Who May Find This Useful

This discussion may be useful for individuals interested in pursuing quantum cosmology, particularly those seeking guidance on foundational topics and resources to enhance their understanding of the field.

houhou.trad
Messages
16
Reaction score
0
Hello every body. I want to learn about quantum cosmology but I always find lot of difficulties :confused:. I have a very usual background :frown: on Quantum Mechanics and General Relativity. What are the required specific topics of QM or GR that i should learn before I can learn about Quantum Cosmology. I think it will be a great idea if you suggest me some books or lecture notes..that can help me .
thanks for everybody :biggrin:.
 
Space news on Phys.org
Thanks ChrisVer. I am now looking at this article. What I have meant is the prerequisite background to make Quantum Cosmology more understandable.
 
Just by this question, I would say: "Quantum field theory" at least for scalar fields, and "Cosmology" (A certain branch of General Relativity)...
Then it depends from which point of view you are approaching quantum cosmology. For example string theory and supergravity can come in the play at some point.
 
Quantum cosmology generally does not include inflation. houhou.trad, what topics are you interested in studying? Quantum creation of universes, multiverse, wavefunction of the universe, etc?
 
This can also be helpful...
http://www.damtp.cam.ac.uk/research/gr/public/qg_qc.html
 
Thanks ChrisVer. This is a very helpful answer for me. I have some weakness in grasp of QFT. Perhaps that's why I have found problems. But about cosmology, all I know is from some introductory such as B. Ryden and M. Roos. Is this sufficient?
 
Thanks Bapowell for the reply. I am perhaps interesting in Quantum creation of universes. I want to understand some papers that used Bohmian mechanics for Quantum Cosmology, but first, I have to read about Quantum Cosmology.
 
Loop Quantum Gravity is the theory which underlies most of the ideas that go under the heading, "Quantum Cosmology."
 
  • #10
If you like extreme geometry/topology, you will love quantum cosmology.
 
  • #11
Chronos said:
If you like extreme geometry/topology, you will love quantum cosmology.
Do you mean quantum cosmology demand more geometry than that we find in usual G.R.?
 
  • #12
bapowell said:
Quantum cosmology generally does not include inflation. houhou.trad, what topics are you interested in studying? Quantum creation of universes, multiverse, wavefunction of the universe, etc?
Let's say I am interested in the Quantum creation of universes. what is the main physical and mathematical tools I need to read and understand Quantum cosmology, assuming that I have some grasp of Q.M. and G.R.?
 
  • #13
Not as long as you chose to disregard non-euclidean geometry.
 
  • #14
houhou.trad said:
Let's say I am interested in the Quantum creation of universes. what is the main physical and mathematical tools I need to read and understand Quantum cosmology, assuming that I have some grasp of Q.M. and G.R.?
GR and QFT are necessary, though I'm not sure if they're sufficient (I'm not an expert). The early papers on the subject centered around the study of instantons, which describe tunneling events. When applied to the universe as a whole, these instantons describe the quantum birth of so-called bubble universes. The tunneling event is a field theory problem, whereas the dynamics of the bubbles after nucleation is understood within the context of GR. Here is an early paper by Alex Vilenkin: http://www.gravityresearchfoundation.org/pdf/awarded/1983/vilenkin.pdf .

He has several others but they are behind paywalls. Give that one a try and see what you think.
 
Last edited by a moderator:
  • #15
Take a look at lecture 4 of Intro to Quantum Gravity at the PIRSA site. It contains an overview of the mathematics and common notational conventions used in the course.
The course in general is much heavier on differential geometry than quantum theory.
http://pirsa.org/C06001
 
  • #16
spacejunkie said:
Take a look at lecture 4 of Intro to Quantum Gravity at the PIRSA site. It contains an overview of the mathematics and common notational conventions used in the course.
The course in general is much heavier on differential geometry than quantum theory.
http://pirsa.org/C06001
spacejunkie, thank you for this reply :smile:. I think that it would be very helpful.
 

Similar threads

  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 153 ·
6
Replies
153
Views
14K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 40 ·
2
Replies
40
Views
5K
  • · Replies 11 ·
Replies
11
Views
4K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 51 ·
2
Replies
51
Views
6K