Abstract
We show here that the recent work of Wolf and Wullschleger (quant-ph/0502030) on oblivious transfer apparently opens the possibility that non-local correlations which are stronger than those in quantum mechanics could be used for bit-commitment. This is surprising, because it is the very existence of non-local correlations which in quantum mechanics prevents bit-commitment. We resolve this apparent paradox by stressing the difference between non-local correlations and oblivious transfer, based on the time-ordering of their inputs and outputs, which prevents bit-commitment.
Translated title of the contribution | The physics of no-bit-commitment: Generalized quantum non-locality versus oblivious transfer |
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Original language | English |
Pages (from-to) | 131 - 138 |
Number of pages | 8 |
Journal | Quantum Information Processing |
Volume | 5 (2) |
DOIs | |
Publication status | Published - Apr 2006 |