physics

“For the reasons stated above, and since we already have ample evidence that the term “quantum supremacy” is being broadly misinterpreted and causing ever growing amounts of confusion, we urge the community to treat claims that, for the first time, a quantum computer did something that a classical computer cannot with a large dose of skepticism due to the complicated nature of benchmarking an appropriate metric.

Wenn das wahr ist, wäre es tatsächlich ein Meilenstein. Allerdings ist es im Moment eher ein Gerücht, da das Paper zurückgezogen wurde. Auch stimme ich der Kritik am Ende des Artikels zu, wo es heißt:

And soon we will rule the world, muhahaha…! wired.com To Solve Its Hardest Problems, Silicon Valley Turns to Physicists As the technological challenges of tech companies get bigger and badder, a crowd of physicists is moving in on the engineer headcount

Finnische Ostergrüße! (oder wie auch immer man das nennen mag) youtube.com Easter special with hydraulic press Easter vs. our pressDo not try this at home!! or at any where else!!Music Thor’s Hammer-Ethan Meixell

Endlich ein guter Artikel über Albert Einstein! nature.com History: Einstein was no lone genius - Nature Lesser-known and junior colleagues helped the great physicist to piece together his general theory of relativity, explain Michel Janssen and Jürgen Renn.

This is the best article about physics I have read in a long time. If you have not read about physics in the last 50 years or so, I recommend you to read this single article.

General Relativity (GR) is a classical field theory (whatever that means, could be something like Electrodynamics or something like Fluiddynamics) There is no gravitational force. Principle of Mach: The distribution of matter and energy defines the geometry of space-time Principle of Equivalence: Acceleration = homogenous (in time and space) gravitational field; Principle of Covariance: All coordinate systems are equal.

The semi-classical limit corresponds to $ h\rightarrow 0$, which can be seen to be equivalent to $ m\rightarrow\infty $ , the mass increasing so that it behaves classically. (from http://en.

Bibliography Christopher Eling (2008) : Hydrodynamics of spacetime and vacuum viscosity Christopher Eling et al. (2006) : Non-equilibrium Thermodynamics of Spacetime Ted Jacobson (1995) : Thermodynamics of Spacetime: The Einstein Equation of State

Cherenkov Radiation is a very interesting phenomenom. Recently I asked myself, if such a phenomenom allso exists for gravity in the sense, that if a particle moves faster than the speed of gravity in a medium, it should radiate gravitational cherenkov radiation.