metamaterials influence photons just like the curvature of spacetime, allowing for experiments at the planck scale, artificial black holes, etc.
Tag: physics
Box2D
open source physics engine used in many flash and mobile games.
Against Anthropic Cosmological Constant
the cosmological constant should be negative for maximum formation of matter, but it isn’t.
Timelike Entanglement
Conventional entanglement links particles across space. A similar effect links particles through time.
i’ll await the experimental results with interest.
Conformal cyclic cosmology
Our cosmos was “bruised” in collisions with other universes. Now astronomers have found the first evidence of these impacts in the cosmic microwave background. Conformal cyclic cosmology (CCC) posits the existence of an aeon preceding our Big Bang ‘B’, whose conformal infinity ‘I’ is identified, conformally, with ‘B’, now regarded as a spacelike 3-surface. Black-hole encounters, within bound galactic clusters in that previous aeon, would have the observable effect, in our CMB sky, of families of concentric circles over which the temperature variance is anomalously low, the center of each such family representing the point of ‘I’ at which the cluster converges.
or perhaps it was a 4D star?
The Universe formed from the debris ejected when a 4-dimensional star collapsed into a black hole — a scenario that would help to explain why the cosmos seems to be so uniform in all directions.
2022-02-26: Sabine Hossenfelder offers comments:
If the previous eon leaves information imprinted in the next one, then it isn’t obvious that the cycles repeat in the same way. Instead, I would think, they will generally end up with larger and larger fluctuations that will pass on larger and larger fluctuations to the next eon because that’s a positive feedback. If that was so, then Penrose would have to explain why we are in a universe that’s special for not having these huge fluctuations.
Life is Physics
We discuss how condensed matter physics concepts might provide a useful perspective in evolutionary biology, the conceptual failings of the modern evolutionary synthesis, the open-ended growth of complexity, and the quintessentially self-referential nature of evolutionary dynamics.
LHC 1PB / s
one of the most data-intensive apps in the world today. from 1 PB / s to a mere 1 GB / s.
Vacuum Collapse
the “measure problem” of eternal inflation posits that the local void bubble will collapse in 3.7b years.
2013-12-13: good news everyone: there is an upper bound on the probability of earth being utterly destroyed of 1 in 1B per year.
Black Hole Inflation
A small change to the theory of gravity implies that our universe inherited its arrow of time from the black hole in which it was born. Our own Universe may be the interior of a black hole existing in another universe.
2019-01-02:
If complexity does underlie spatial volume in black holes, Susskind envisions consequences for our understanding of cosmology in general. “It’s not only black hole interiors that grow with time. The space of cosmology grows with time. I think it’s a very, very interesting question whether the cosmological growth of space is connected to the growth of some kind of complexity. And whether the cosmic clock, the evolution of the universe, is connected with the evolution of complexity. There, I don’t know the answer.”
Entangled DNA
one line of evidence is that a purely classical analysis of the energy required to hold DNA together does not add up. It is possible that DNA is indeed quantum-efficient.
if Grover-algorithmic processing is some sort of fundamental property of nature, then you might expect the genetic material to be synthesized most efficiently when the machinery has a choice of 4 different nucleotides. And when translating these into proteins, a triplet code (which requires 3 processing steps) would function most efficiently when working with a palette of 20 amino acids. I will admit to being unusually susceptible to ideas like this, but that makes the hair stand up on the back of my neck.
Gregor J. Rothfuss 