Ice water on closed timelike curves
Today, let’s kick off our shoes and relax our standards for what counts as a reasonable spacetime. Let’s talk about spacetimes allowing for a certain kind of time travel, called…
Read moreToday, let’s kick off our shoes and relax our standards for what counts as a reasonable spacetime. Let’s talk about spacetimes allowing for a certain kind of time travel, called…
Read moreThe 2009 Nobel Laureates in Physics have been announced! This year the award honors pioneers in information technology. Half the prize is going to Charles Kao (Standard Tel Labs), and…
Read moreCan you visualize a normalized wave function on spacetime? Let’s try with a simple example. The role of a wave function is to assign a complex number to each point…
Read moreDuring a visit to Skydive, PA yesterday, I noticed jumpmaster Jim tightening a corset-like weight belt onto his abs. “Jim, your figure looks so refined,” I commented. Jim sneered. “I’ve…
Read moreWhen I studied history of science, my teachers — especially Ken Manders and Paolo Palmieri — hammered two principles like drill sergeants: Always read the original manuscripts; Always pay attention…
Read more