Recent content by Rene Kail

Does the polarization spectrum TE measured by the Planck and WMAP satellites show evidence for superhorizon fluctuations at low multipoles and are these evidence for pre-bigbang inflation?

Is it possible to estimate the number of hot and cold spots of average diameter of 1° in a full-sky map of the CMB?

[Mentor Note -- thread moved from the schoolwork forums to the technical forums] Homework Statement:: Tentative Note and summary on the origin and the evolution of information in the universe. Relevant Equations:: none As a teacher of physics I got many questions asked by my students when...

Why should you prefer the view that cosmological expansion is due to distant galaxies moving apart according to the Hubble Law instead of cosmic space stretching, like stretching of space(-time) in the vicinity of black holes?

Are timelike entanglement and experiments demonstrating causal non-separability by quantum superposition of causal orders an indication that causal principles may not be applicable to quantum mechanics?

"The arrow of time is an arrow of increasing correlations (with the surroundings)", Seth Lloyd said. So the von Neumann entropy can be considered as being consistent with the entanglement arrow of time, as Sandu Popescu et al showed 2009. rhkail

I cannot figure out how the spins are encoded in a preferential direction (vector n). An example or a graphical representation in the complex plane could be helpful. Moreover, why is the density operator rho not described by a matrix? rhkail

I have difficulties to understand the details of the topic "between the lines". Please can you give a simple example - maybe using a graphical representation - illustrating the bra-ket mathematics in this section. rhkail

As many readers I share the enthusiasm about your article "Inflationary misconceptions". While reading I spotted a mistake (not a misconception!) in Fig. 9 illustration and caption on page 10. In deSitter expansion the event horizon = Hubble radius = constant for all times. So both are...