Month: <span>June 2012</span>

Quantum Horse Races and Crystals of Light

Start with a row of rubidium atoms, place your bets, let ’em go.

SINGAPORE—I’d heard of quantum dice, quantum poker, quantum roulette, and even quantum Russian roulette, but a quantum horse race? I learned about this surreal game of chance last December during a symposium at the Centre for Quantum Technologies in Singapore. Start with a row of rubidium atoms, place your bets, let ʼem go, and measure […]

George Musser 0 Comments 6 min read Continue reading

Charismatic Megaparticles Might Hint at Dark Matter, and Much Besides

Out in the cosmos, “dark accelerators” slingshot particles to huge speeds and no one knows why.

At a lecture I went to some years ago, astrophysicist Trevor Weekes compared garden-variety elementary particles to mosquitoes. They are plentiful and easy to find—indeed, they find you. But ultra-high-energy gamma rays, he said, are like elephants. They are fairly rare, but among the greatest of creatures. They often roam in spectacular habitats. Their sheer […]

George Musser 0 Comments 5 min read Continue reading

Is Dark Matter a Glimpse of a Deeper Level of Reality?

Many theoretical physicists speculate that space and time arise from deeper physics. Erik Verlinde goes them one further.

SANTA BARBARA—Two years ago several of my Sci Am colleagues and I had an intense email exchange over a period of weeks, trying to figure out what to make of a new paper by string theorist Erik Verlinde. I don’t think I’ve ever been so flummoxed by physicists’ reactions to a paper. Mathematically it could […]

George Musser 0 Comments 8 min read Continue reading

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