I am the Professor of Quantum Information Theory at the University of Oxford, as well as for the Centre for Quantum Technologies at the National University of Singapore. I spend a lot of my time thinking about what quantum mechanics actually means, and how it affects everything and everyone around us.
My latest blog post
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.
Published: January 9, 2022Read in Full
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
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.
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.
A local-realistic theory for fermions
We propose a local model for general fermionic systems, which we express in the Heisenberg picture. To this end, we…
A Microscopic Quantum Model For the Experiment Coupling Qubits to a Tardigrade
We provide a quantum model for the recent experiment coupling a tardigrade to superconducting qubits. A number of different perspectives…
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