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Showing 2009 · quant-phShow all
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quant-ph2009★ 88 cited
Can closed timelike curves or nonlinear quantum mechanics improve quantum state discrimination or help solve hard problems?
Charles H. Bennett, Debbie Leung, Graeme Smith +1
We study the power of closed timelike curves (CTCs) and other nonlinear extensions of quantum mechanics for distinguishing nonorthogonal states and speeding up hard computations. I…
quant-ph2009★ 59 cited
Extensive nonadditivity of privacy
Graeme Smith, John A. Smolin
Quantum information theory establishes the ultimate limits on communication and cryptography in terms of channel capacities for various types of information. The private capacity i…