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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It’s Quantum Physics All the Way Down

This is not an essay about the philosophy of infinite regress. No, none of my essays are ever about philosophy. I’d like to tell you about an interesting question in quantum physics that I believe deserve more attention.

Image: What is reality? (c) Chiara Marletto

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Spacetime, Causality and the Quantum

The whole seemingly paradoxical nature of quantum physics (by paradoxical I simply mean that it does not conform to the rules of the ordinary classical logic) stems from the linearity of quantum operations.

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The Weighty Matter of Fermions and Bosons

Something surprised me greatly recently. I realised that what we have all been taught about fermions and bosons might be completely false.

Image (c) Mia Vedral

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Entangled Tardigrades

Some creatures never say die. I’ve recently read an article about a bunch of tardigrades – aka “slow steppers”, in which the author described how tardigrades were sent to outer space attached to a rocket to test their robustness.

An artist’s impression of Neil Wormstrong (c) Mia Vedral

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How Much of Mathematics is Really Just Physics?

I’d like to dedicate this short piece to my late friend Prof. Peter T. Landsberg, who was a “thermodynamicist” (this is how he liked to call himself). I used to meet him at the Athenaeum, in the good old days when smoking cigars was still allowed indoors.

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Absolute zero is the lowest temperature but is there an upper limit?

There are a number of arguments as to why there should be an upper bound on the value of temperature. The simplest is that temperature is related to energy (via Boltzmann’s constant). So if we believe that the energy in the universe is finite (a reasonable supposition), then that gives us the highest temperature.

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