In quantum mechanics, certain unitary operators have been understood since the time of Wigner in terms of spacetime symmetries. Why? The foundation for this kind of thinking has an interpretive and…
Read moreWhich philosophy of physics books are relatively recent (say, post-1980), but still clear classics that every graduate student in the field should at least paw through? Here’s a preliminary list,…
Read moreIt wasn’t centuries of successful theories of mechanics, planetary dynamics, and interplanetary travel that confirmed Galilean freefall. Oh no. It was this. Soul Physics is authored by Bryan W. Roberts.…
Read moreThe Bell Theorems, together with a collection of experimental results (such as those of Aspect et al.), provide good statistical evidence that quantum theory is “non-local.” Roughly, this means that…
Read moreAnswer: exactly the same way positive mass would. That’s unusual, because if you try to push a negative mass, it behaves in surprising ways. While a positive mass will accelerate…
Read more