Max Tegmark advocates the iniverse being a purely mathematical structure. There are predecessors of this idea in history, e.g. the ancient Greeks or Eugene Wigner and his famous and often quoted article The Unreasonable Effectiveness of Mathematics in the Natural Sciences.
WP: Max Tegmark
WP: Eugene Wigner
WP: The Unreasonable Effectiveness of Mathematics in the Natural Sciences
Quantum mechanics uses two important concepts we usually are not aware of in daily life: the principle of least action (as classical mechanics does) and wave functions with amplitudes, which leads to a probability density according to Born's rule. There is a third concept evolving from those: Feynman's path integral method mimics Fermat's principle.
WP: Fermat's principle
WP: Action principles
WP: Path integral formulation
WP: Wave function
WP: Probability amplitude
WP: Born rule
Neil Turok has got new views and insights about black holes and the beginning and structure of the universe which differ from the established scientific opinion of the majority.
WP: Neil Turok
Neil Turok
Neil Turok on the case for a parallel universe going backwards in time (25 January 2023)
A mirror universe might tell a simpler story: Neil Turok (November 8, 2023)
Why should we encrypt (and/or sign) emails? The question should be the other way: why does anyone think and act like this isn't the default?
Benjamin Ismaïl from Reporters without Borders gives some insights (French with English subtitles).
Thermodynamics and probability theory have something in common: the idea of entropy. What exactly is entropy? How can it be understood on an intuitive level without to much mathematics? This is an introduction with simple ideas from physics.
There is a proposal for an experiment to decide whether general relativity is not correct at the quantum level. This opens a window to understand which way towards a theory of quantum gravity might be chosen.
Prof Vlatko Vedral
Vlatko Vedral, Professor of Quantum Information Theory
WP: Vlatko Vedral
Chiara Marletto - Wolfson College
Chiara Marletto
Constructor Theory
WP: Chiara Marletto
Gravitationally-induced entanglement between two massive particles is sufficient evidence of quantum effects in gravity
I rediscovered an old video I had been searching for for a long time. Watch, enjoy and be astonished.
David Richeson: Division by Zero
David Richeson
WP: David Richeson
The strength of the electromagnetic interaction is desribed by the fine-structure constant aka Sommerfeld constant. It appears at different places in modern physics in an almost magical way, and it still remains mysterious.
Quote Wolfgang Pauli: When I die my first question to the Devil will be: What is the meaning of the fine structure constant?
WP: Fine-structure constant
WP: Arnold Sommerfeld
WP: Wolfgang Pauli
The lifetime of the universe has not been long enough to transport information from every place to every other place. Despite this fact regions in different directions without contact have similar properties. How does this work? Superluminal transport of information is excluded by relativity. The observations of the cosmic microwave background are astonishing.