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Non-destructive measurement of qbits
Topic Started: Jan 20 2013, 11:33 AM (318 Views)
mok-kong shen
NSA worthy
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To my humble knowledge all literatures till now say that measuring quantum data irreversibly damages them.

Now news.yale.edu/2013/01/11/new-qubit-control-bodes-well-future-quantum-computing says:

"The Yale physicists successfully devised a new, non-destructive measurement system for observing, tracking and documenting all changes in a qubit's state, thus preserving the qubit's informational value."

There is a very recent paper arxiv.org/abs/1301.7351 by R. Anderson and R. Brady entitled "Why quantum computing is hard - and quantum cryptography is not provably secure".

I hope that experts could evaluate both of these research results and tell us whether quantum crypto remains provably secure or not.
Edited by mok-kong shen, Feb 6 2013, 10:49 PM.
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