- Bell’s theorem is a term encompassing a number of closely related results in physics, all of which determine that quantum mechanics is incompatible with local hidden-variable theories, given some basic assumptions about the nature of measurement. “Local” here refers to the principle of locality, the idea that a particle can only be influenced by its immediate surroundings, and that interactions mediated by physical fields cannot propagate faster than the speed of light. “Hidden variables” are supposed properties of quantum particles that are not included in quantum theory but nevertheless affect the outcome of experiments. In the words of physicist John Stewart Bell, for whom this family of results is named, “If [a hidden-variable theory] is local it will not agree with quantum mechanics, and if it agrees with quantum mechanics it will not be local.”
- Gig Harbor — Thumbnail History (historylink.org)
Gig Harbor is a city in Pierce County located on a picturesque Puget Sound bay – also called Gig Harbor – across Tacoma Narrows from Tacoma. For centuries, the Twa-Wal-Kut band of the Puyallup Tribe had a longhouse and permanent camp at the head of the harbor. Explorers from the Wilkes Expedition discovered the harbor’s well-hidden opening in 1841 and named it Gig Harbor because they had entered the bay in a small captain’s gig…