Ross Anderson and Robert Brady have posted on arXiv a fascinating article that explores a new interpretation of quantum mechanics based on a soliton model of particles. Most intriguingly, in this model quantum computation in three-dimensional space with more than four qubits may not be possible(!).
[1301.7351] Why quantum computing is hard - and quantum cryptography is not provably secure
Abstract: Despite high hopes for quantum computation in the 1990s, progress in the past decade has been slow; we still cannot perform computation with more than about three qubits and are no closer to...
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- Perhaps fascinating, but hopelessly misinformed: http://seeking-mind.blogspot.com/2013/02/no-threat-to-quantum-cryptography-at.htmlFeb 5, 2013
- Thanks; it does seem to be the case that the A&B theory is getting (perhaps deservedly) harsh reviews from quantum physicists.... (Also see Scott Aaronson's blog...)Feb 5, 2013