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Quantum information: The promise

3 July 2013

Processing data in quantum states offers the prospect of peerlessly powerful, economical and secure number crunching. The challenge is to make it a reality

Black hole firewall: Trouble on the edge

3 April 2013

The problem that Stephen Hawking spotted around black holes has made a fiery return. Anil Ananthaswamy reports on how it threatens quantum theory and gravity

Mindreader: Facebook of revelations

25 April 2012

Your social networks know far more about you than you reveal, and as Jim Giles discovers, they might even know you better than you know yourself

Quantum hackers: Cracking the uncrackable code

19 October 2011

It promised the ultimate in security, but quantum cryptography is under attack – from cunning eavesdroppers who have worked out how to fool the system

Unbreakable: The MIT time-lock puzzle

18 May 2011

A giant of internet cryptography has devised a code that he says will take 35 years to solve – with a mystery prize sealed in lead. MacGregor Campbell reports

Uncertainty entangled: The limits of quantum weirdness

27 April 2011

In a battle between the star principles of the quantum story, there can be only one winner. Or can there? Anil Ananthaswamy investigates

Reality check: Closing the quantum loopholes

23 February 2011

Can the universe really be as weird as quantum theory suggests? Ingenious experiments are coming close to settling the issue, says Anil Ananthaswamy

A measure for the multiverse

3 March 2010

Is our universe just one of many? The idea divides physicists, but now one researcher has found the first hint that the multiverse really exists

'Quackers' tarnish quantum secrecy's halo of invincibility

15 October 2008

As the first network protected by quantum cryptography is switched on, eavesdroppers are using increasingly sophisticated methods to crack such "unhackable" systems

Feedback

2 January 2008