information

Demonstrate Quantum Encryption With a Flashlight and Pair of Sunglasses

Thumb your noise at government surveillance with a highly simplified form of quantum cryptography.

“Are you telling me that this could be of practical use?” exclaimed the Irish physicist John Bell. He had shown in the 1960s that quantum entanglement burrowed deep into the foundations of physics, but even he hadn’t thought it could have real-world applications. That was the brainstorm of Artur Ekert, then a graduate student at […]

It From Bit or Bit From It? The Fifth Foundational Questions Institute Essay Contest

What a great way to start the week: the Foundational Questions Institute has just announced its fifth essay contest. The topic is the physics of information. It could hardly be more timely, and not just because of the cultural Zeitgeist. Going to a physics conference these days is like landing in The Village of the […]

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