My Blog

This is a space where I share my thoughts on numerous topics, press articles and interviews, and delve into some of the more complicated and frequently asked scientific questions.

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How Newton invented Hidden Variables and Fresnel discovered Decoherence

I’d like to tell you something you might find surprising (I did) and it’s all about things in classical physics that happen to be analogous to some of the concepts frequently thought to be strictly quantum mechanical. In order to fully appreciate the title, I’d like to claim, more specifically, that Newton was the originator of the first hidden variable theory in physics and that the concept of decoherence was discovered by the French physicist Fresnel.

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Photo by Tomaz Barcellos:

Weak Measurements and Consciousness

I’ve been writing a great deal about quantum measurements and the fact that, in quantum physics, they are basically entangling operations. No need for collapse postulates or any non-linear modifications to the unitary dynamics. No quantum jumps or any other discontinuities.

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Occasionalism and Quantum Entanglement

Quantum physics is frequently viewed as violating the law of causality, namely that the same causes ought to produce the same effects. If I drop a ball from rest from a certain height, it will always reach the ground in the same amount of time, and with the same terminal speed. No matter how many times we repeat this experiment (and Galileo had done it till he was blue in the face) we will never obtain – to within an experimental error – a different result. The same initial conditions always produce the same final outcomes in classical physics.

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Quantum Physics: Consistent and Complete

If you watch various online quantum discussions these days you will most likely hear two statements being repeated frequently. One is that quantum physics is inconsistent. And the other one is that it is incomplete. I’d like to discuss each in turn and convince you that, in fact, neither of them is true.

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Photo by Mahdi Bafande:

Quantum Space-time and Human Vision

I’ve recently been reading an excellent book on the ancient Greek and medieval philosophy of space and time. The author is Richard Sorabji and the title of his 1983 exposition is “Time, Creation and the Continuum”. Sorabji is a historian of philosophy and his book has – for the first time – revealed to me the extent, intricacy and beauty of some of the arguments pertaining to the topic of space and time from that period.

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Schrödinger’s Pendulum Experiment Will Search for the Quantum Limit

There’s a rift in reality—an invisible border that separates two utterly different realms. On one side lies our everyday world, where things obey commonsense rules: objects never occupy more than one place at a time, and they exist even when we’re not looking at them. The other side is the dreamscape of quantum mechanics, where nothing is fixed…

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