If black holes destroy information, they create a serious conflict within otherwise well-established theories.
Today in Quanta magazine, I have an article on recent efforts to de-paradoxize black holes. Before you dive into the details, you might wonder about the framing. How paradoxical are black holes, really? Physicists and science writers throw around the word “paradox,” but do these cosmic sinkholes pose any out-and-out contradiction? I put the question […]
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 […]
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 […]