Debajyoti Sarkar

4 Questions 6 Answers 0 Followers

Questions related from Debajyoti Sarkar

How much does the Lithium problem affect our understanding of the Big bang theory?

The observed Lithium abundance is in disagreement with the standard big bang model. What are the possible solutions to the problem? How much the observations are reliable in this case? Is it...

30 March 2015 8,497 11 View

How to calculate power spectrum from density perturbation?

What is the method for finding the power spectrum from the distribution of density? Considering I have the distribution of density over a certain volume.

02 May 2014 3,908 2 View

How should I choose a particular gauge in first order perturbation in general relativity?

In the case of general relativity the change in coordinate can give rise to fictitious perturbations, for which we can use gauge invariant variables or we can also choose a specific gauge. My...

16 April 2014 3,507 3 View

Is not the second law of thermodynamics violated in cyclic cosmology?

It was shown by Tolmann that if the cosmological constant is zero then no minimum radius of universe exists (rate of expansion becomes negative infinite at R=0). Now dark energy gives a...

09 August 2013 7,840 6 View