Johan Hansson says it is dangerous to treat artificial intelligence as a magic wand and thinks researchers should create their own AI tools that they can control better.

Quantum theory lives in abstract, infinite-dimensional, complex, linear Hilbert space, is unitary and non-dissipative, and has been proven not to be embeddable in spacetime for N ≥ 2 quantum entities. It is per definition unobservable (in itself). Classical physics describes the causal, nonlinear dynamics of actual events, which lie in, and also define, four-dimensional spacetime. The “Born Rule” maps abstract quantum theory into events, i.e. real outcomes, in classical spacetime. It must be postulated separately and cannot be deduced from quantum theory,as it is both non-unitary and irreversible, i.e. dissipative. Hence, the “Born Rule” is ultimately and fundamentally responsible for dissipation, i.e. friction, and therefore all evolving complex systems, in the classical, observable world.

Glada amatörer på universitet, företag och i hela samhället leker med elden utan att veta något om konsekvenserna ens i närtid, än mindre på tio års sikt, skriver Johan Hansson.

Quantum theory lives in abstract, infinite-dimensional, complex, linear Hilbert space, is unitary and non-dissipative, and has been proven not to be embeddable in spacetime for N > 2 quantum entities. It is per definition unobservable (in itself). Classical physics describes the causal, nonlinear dynamics of actual events, which lie in, and also define, four dimensional spacetime. The "Born Rule" maps abstract quantum theory into events, i.e. real outcomes, in classical spacetime. It must be postulated separately and cannot be deduced from quantum theory, as it is both non-unitary and irreversible, i.e. dissipative. Hence, the "Born Rule" is ultimately and fundamentally responsible for dissipation, i.e. friction, and therefore all evolving complex systems, in the classical, observable world.

Naturvetenskapens egentliga uppgift är att försöka ta reda på hur naturen verkligen är.

I en serie korta, sinsemellan oberoende, kapitel skriver författaren om svenska forskokrater, gamma­fotoner i solens kärna, George Gamow, Bells teorem, förstörelsen av vår planet, excellenta forskare, supersymmetri, paradigm­skiften, Fred Hoyle, fega forskningsfinansiärer, värdet av friktion, naturkonstanter, mörk energi, kvantbiologi och mycket mer.

Quantum theory lives in abstract, complex, linear Hilbert space, is unitary and non-dissipative, and has been shown not to be embeddable in spacetime for N > 2quantum entities. It is per definition unobservable (in itself). Classical physics describes the causal, nonlinear dynamics of actual events, which lie in, and also define, four-dimensional spacetime. The "Born Rule" connects abstract quantum theory with real events in classical spacetime. It is postulated separately and cannot be deduced from quantum theory, as it is both non-unitary and irreversible, i.e. dissipative. Separating and treating it correctly in this manner resolves a number of fundamental problems of gravitation vs. quantum theory, such as the black hole information paradox,the cosmological constant problem and quantization of general relativity.

Almost no one mentions the fastest, easiest, and most effective way to solve the crises that today threaten humanity: To decrease energy and resource consumption.

The standard approach to cosmology is: 1. Construct an overly simplified model. 2. Deduce its general relativistic consequences (Friedmann's equations). 3. Observe that they do not correspond to the real universe. 4. Invent increasingly many "amendments" (LCDM: dark energy, dark matter + additional free parameters) to save the model. We, instead, point out that full nonlinear gravity itself has the potential to explain cosmological observations without the introduction of hypothetical ingredients. This essay hopes to communicate the necessity of taking seriously the real, observed, "lumpy" universe and the resulting automatic nonlinearities of general relativity, instead of allowing an oversimplified "smooth" cosmological model to perpetuate a consensus worldview of a universe allegedly dominated by mysterious "dark", and never seen, components.