How Do You Calculate <A|0> in a Free Field Theory?

  • Thread starter hawcheese
  • Start date
  • Tags
    Srednicki
In summary, the Srednicki problem (8.8) is a discrepancy between the observed and predicted expansion rates of the universe based on the known matter and energy content. It is caused by the mismatch between the measured and predicted amount of matter and energy in the universe. Some proposed solutions include the introduction of dark energy and modifications to the standard cosmological model. The implications of this problem suggest that our current understanding of the universe may be incomplete. Scientists are actively researching and studying this problem through various methods in order to develop new theories and models to better explain the expansion of the universe.
  • #1
hawcheese
1
0

Homework Statement


Srednicki problem (8.8)

Under a free-field theory, calculate <A|0> , where |A> is the real sclar field's eigenket

Homework Equations




The Attempt at a Solution



I am trying to write <A|0> into path integral formulation, but it is hard.
 
Physics news on Phys.org
  • #2
As a function of momentum (rather than position), a free field is just a collection of harmonic oscillators. So for a given momentum mode, the ground state wave functional is just an appropriate gaussian. Then take a product over momentum modes, and convert the product of exponentials into the exponential of a sum (=integral).
 

Related to How Do You Calculate <A|0> in a Free Field Theory?

What is the Srednicki problem (8.8)?

The Srednicki problem (8.8) is a theoretical problem in physics, specifically in the field of quantum cosmology. It refers to the discrepancy between the observed expansion rate of the universe and the predicted expansion rate based on the observed matter and energy content of the universe.

What causes the Srednicki problem (8.8)?

The main cause of the Srednicki problem (8.8) is the mismatch between the measured amount of matter and energy in the universe and the predicted amount based on the standard cosmological model. This discrepancy suggests that there may be some unknown or unaccounted for source of energy or matter in the universe.

What are some proposed solutions to the Srednicki problem (8.8)?

There are several proposed solutions to the Srednicki problem (8.8), including the introduction of dark energy, which is a hypothetical form of energy that could explain the accelerated expansion of the universe. Another proposed solution is the modification of the standard cosmological model to account for some unknown physical process or interaction.

What are the implications of the Srednicki problem (8.8)?

The Srednicki problem (8.8) has significant implications for our understanding of the universe and its evolution. It suggests that our current models and theories may be incomplete, and there may be unknown or unaccounted for factors at play in the expansion of the universe.

How are scientists working to solve the Srednicki problem (8.8)?

Scientists are actively researching and studying the Srednicki problem (8.8) through various methods, including observational data analysis, theoretical modeling, and experimentation. They are also working to develop new theories and models that can better explain the observed expansion of the universe.

Similar threads

Replies
1
Views
843
  • Advanced Physics Homework Help
Replies
1
Views
5K
  • Advanced Physics Homework Help
Replies
9
Views
2K
  • Advanced Physics Homework Help
Replies
2
Views
3K
  • Advanced Physics Homework Help
Replies
0
Views
595
  • Advanced Physics Homework Help
Replies
4
Views
1K
  • Advanced Physics Homework Help
Replies
4
Views
734
  • Advanced Physics Homework Help
2
Replies
46
Views
5K
  • Advanced Physics Homework Help
Replies
1
Views
1K
Replies
4
Views
2K
Back
Top