STILLWATER, MINNESOTA—Two men sit at a long table, oblivious to the breakfast-time commotion. One moves a coffee cup from one side of a water glass to the other. “If I look here and don’t see the cup,” he says to the other, “then I know it must be there.” It sounds like a “deep” exchange between swotty young philosophy majors. But the fellow moving the cup has gray hair— and a Nobel Prize in physics. Sliding the porcelain, Anthony Leggett of (...) the University of Illinois, Urbana-Champaign, explains how scientists might try to see past the strictures of quantum mechanics, the bizarre theory that governs the behavior of tiny objects and clashes with our everyday notions of reality. “None of the existing interpretations of quantum mechanics as a theory of the entire world is satisfactory,” Leggett says to John Preskill, a physicist at the California Institute of Technology in Pasadena. Leggett, Preskill, and 22 other physicists, philosophers, and historians have gathered here for the Seven Pines Symposium.* Packed into a slightly ramshackle lodge in a wooded state park, the scholars—all of them men—will share their insights, suites of rooms without telephones, and meals of roast quail and pheasant at a long communal table. Perhaps not since the famous Solvay Conferences of the early 20th century, at which Niels Bohr and Albert Einstein debated the meaning of quantum theory in their free time, has physics seemed so genteel. Each year, the symposium tackles another of physics’ enduring puzzles: the nature of the vacuum, the concept of a f ield, the meaning of time. The aim is not to resolve the mysteries but to seed new lines of inquiry, says Roger Stuewer, a historian at the University of Minnesota, Twin Cities, and chair of the symposium’s advisory board. “When we get the best people together,” he says, “ideas are planted that in some intangible way will influence what they do in the future.” Those germinating ideas are watered with a mellow Zinfandel and nourished with succulent steak. This year, attendees spent 5 days grappling with the implications of quantum mechanics, which have perplexed physi.. (shrink)