How a gap in quantum mechanics became a choice — and why the most ambitious answer is among the least seriously engaged "No elementary quantum phenomenon is a phenomenon until it is a registered phenomenon, brought to a close by an irreversible act of amplification." —John Archibald Wheeler (1978) A century after quantum mechanics rewrote … Continue reading The Question Physics Chose to Stop Asking
The Court Challenge: What Survives the Ehrenfest Barrier, and Why It Matters
A particle bounces inside an enclosed court. If the court's walls are curved in just the right way — a stadium shape, a square with a circular obstacle — the particle's classical trajectory becomes fully chaotic: exponentially sensitive to initial conditions, mixing through phase space at a rate measured by the Lyapunov exponent λ. This … Continue reading The Court Challenge: What Survives the Ehrenfest Barrier, and Why It Matters
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