June 17th, 2013
Max Tegmark has introduced an anthropic principle specifically related to multiverse scenarios—the minimalistic anthropic principle (MAP). Tegmark believes the anthropic principle has generated more heat than light with so many different interpretations. MAP states that when testing fundamental theories with observational data, ignoring selection effects can give incorrect conclusions.
Tegmark does not use MAP and selection effects to rule out everything. It cannot rule out chaotic inflation by the fact that we find ourselves living in the miniscule fraction of space where inflation has ended, since the inflating part is uninhabitable to us. As pointed out by Ludwig Boltzmann, if the universe were in a classical thermal equilibrium (heat death), thermal fluctuations could still make atoms assemble at random to briefly create a self-aware observer (a Boltzmann brain) like us every once in a blue moon, so the fact that we exist right now does not rule out the heat death cosmological model. So, what should we do with Boltzmann brains?
read more »
May 29th, 2013
My Master’s thesis is now available for download.
Degree: Master of Arts
Chair: W. David Beck
Primary Subject Area: Philosophy; Physics, Astronomy and Astrophysics; Religion, General; Physics, Theory; Physics, General
Keywords: cosmology, fine-tuning, information, multiverse, philosophy of science, quantum
Disciplines: Astrophysics and Astronomy | Cosmology, Relativity, and Gravity | Philosophy | Philosophy of Science | Quantum Physics | Religion
Abstract: The multiverse hypothesis (the view that there is not just one world or universe in existence, bur rather that there are many) is the leading alternative to the competing fine-tuning hypothesis (the laws of physics and constants are fine-tuned for the existence of life).
read more »
April 26th, 2013
The Borde-Vilenkin-Guth Theorem states that any universe, which has, on average, a rate of expansion greater 0 that system had to have a finite beginning. This would apply in any multiverse scenario as well. There are four exceptions to the theorem.*
1. First Exception: Initial Contraction (Havg<0) … (The average rate of the Hubble expansion is less than zero)
- Main Problem: Another problem this raises is that this requires acausal fine-tuning. Any attempt to explain the fine-tuning apart from a fine-tuner is left bereft of any explanation.
2. Second Exception: Asymptotically static (Havg=O)
- Main Problem: The exception is that it does not allow for an expanding or evolutionary universe. This model cannot be true. The best evidence and empirical observations indicate that the universe is not static; rather, it is expanding and evolving. This might have been a great model under Newton but not since Einstein’s field equation concerning the energy-momentum of the universe.
read more »
March 22nd, 2013
I’ve been waiting for new Planck data to come in for a while now and I’ve been very excited about this. First we had COBE (Cosmic Background Explorer) that gave us the first images of the cosmic microwave background radiation approximately 380,000 years after the big bang when light became visible. This discovery led George Smoot and John Mather to receive the Nobel Prize in Physics (2006).
Then we had the Wilkinson Microwave Anisotropy Prove (WMAP) satellite, which provided a much clearer and more defined resolution revealing a much more precise picture of the early universe.
read more »