Does reality exist? Consciousness, simulation and decoherence in the Campbell experiment

Reality or simulation? Science & Vie echoes this month a quantum experiment “that can change everything”. The starting point is the simulation hypothesis. In 2003 Nick Bostrom, philosopher, notes that our descendants will have an exponential numerical power and draws 3 hypotheses: 1) Humanity will be extinct before being able to exploit it. 2) It … Read more

Can we put an end to the debate on interpretations of quantum mechanics?

Helgoland, Carlo Rovelli’s excellent book already mentioned here, deserves a second article. He makes a concise and masterful assessment of interpretations of quantum mechanics, returning back to back those who vainly try to reconcile with classical mechanics and explaining why, in his opinion, conciliation is not necessary. Let’s quickly summarize the assessment: Everett’s multiple universes … Read more

Quantum strangeness in Helgoland

Quantum theory is disturbing Helgoland’ is an excellent popular work by Carlo Rovelli. Tied with Étienne Klein, Carlo is the best at enlightening amateurs. More salient incursions into the philosophical field for Étienne, while Carlo does the same at the forefront of fundamental physics. Author of one of the most prominent theories of quantum gravity. … Read more

Entropy and second principle: the great mystification

The mystification of the ultimate disorder Entropy is the measure of the disorder of an isolated system. The second principle is systematically associated with it: the system can only evolve towards greater entropy / disorder. It is an additive quantity (science say extensive): the entropy of the system is equal to the sum of the … Read more

Quantum oddities under the double look

If necessary, start with What is the double look? Odd in the middle of the other images, not for the math A constant in the popular works of the quantum world: to present the particles as abracadabrant entities, so insane that Lewis Carroll’s Wonderland seems almost wise in comparison. You read that they “alter their … Read more