The previous episode of “this week-ish” was posted on June 5. Its been six months since then. I guess its time to post another volume but to be fair the title of this post has been changed to reflect the longer time span its contents refer to. Gravity as Quantum Computation (contd from Vol. 1)… Continue reading This Year-ish in Theoretical Physics
Schottky Peaks and AdS Black Holes In [1], Clifford Johnson makes yet another contribution to the study of black holes in anti-deSitter spacetimes or AdS black holes, for short. In this work he studies those black holes for which the specific heat at constant volume $ C_V $ (with “volume” here referring to the volume… Continue reading Specific Heats of AdS Black Holes and Quantum Geometry
Sometime ago Jonathan Oppenheim, one of the brightest minds [1, 2, 3, 4, 5, 6, 7, 8, 9] in the frontiers of quantum information and quantum foundations, posted a very interesting article [10] on arXiv. As is the custom these days, he announced the paper in a series of tweets, starting with: A post-quantum theory… Continue reading Comment on "A Post-Quantum Theory of Classical Gravity"
The area of a charged rotating (Kerr) black hole is given by \begin{equation} \label{eqn:kerr-area-relation} A = 4\pi \left[ 2 M^2 + 2 (M^4 – L^2 – M^2 Q^2)^{1/2} – Q^2 \right] \end{equation} This relation can be inverted to express the mass $M$ as a function of charge $Q$, area $A$ and angular momentum $L$: \begin{equation}… Continue reading Euler's Theorem and the Smarr Relation
Black holes are formed due to the gravitational collapse of matter – ordinary matter, consisting of the particles and excitations of the Standard Model that we know and love. These include electrons, photons, neutrinos, quarks, mesons etc, and their respective anti-particles. General Relativity tells us that the properties of (macroscopic) black holes are universal, in… Continue reading Elementary particles and quantum geometry