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Submission + - PayPal offers password key fob

Submitted by
superwad
superwad writes: "The device displays a new one-time password in the form of a six-digit code about every 30 seconds. PayPal clients who opt to use the device will enter this password along with their regular credentials when signing into the service. The key fob is meant as another weapon in the battle on data-thieving phishing scams."
Education

Submission + - Making light solid

Submitted by quant-guru
quant-guru writes: Man's domination of light continues. New Scientist is running a story that highlights recent theoretical proposals for a photonic insulator, an engineered material that could make photons solidify. From the article: "OK, it wouldn't be a material in the everyday sense of the word, like a solid you could touch, but it could behave like one in some important ways...photons interacting in a quantum material could give us insights into how real materials with quantum properties work." One proposal by Greetree et al. (Nature Physics) (preprint) imagines a device that will allow many photons to interact with each other simultaneously in diamond, with phases reminiscent of real materials (from superfluid to insulating). This could lead to novel devices based on quantum phenomena, for quantum communication or quantum computers as examples. Similar proposals were made concurrently by two other groups: Angelakis et al. and Hartmann et al. (Nature Physics) (preprint). University of Cambridge physicist Charlie Tahan has more information and links (with step-by-step pictures) on his site.

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