scholarly journals The Physics of No-Bit-Commitment: Generalized Quantum Non-Locality Versus Oblivious Transfer

2006 ◽  
Vol 5 (2) ◽  
pp. 131-138 ◽  
Author(s):  
Anthony J. Short ◽  
Nicolas Gisin ◽  
Sandu Popescu
Author(s):  
Harry Buhrman ◽  
Matthias Christandl ◽  
Falk Unger ◽  
Stephanie Wehner ◽  
Andreas Winter

Non-local boxes are hypothetical ‘machines’ that give rise to superstrong non-local correlations, leading to a stronger violation of Bell/Clauser, Horne, Shimony & Holt inequalities than is possible within the framework of quantum mechanics. We show how non-local boxes can be used to perform any two-party secure computation. We first construct a protocol for bit commitment and then show how to achieve oblivious transfer using non-local boxes. Both have been shown to be impossible using quantum mechanics alone.


Author(s):  
Craig Callender

Two of quantum mechanics’ more famed and spooky features have been invoked in defending the idea that quantum time is congenial to manifest time. Quantum non-locality is said by some to make a preferred foliation of spacetime necessary, and the collapse of the quantum wavefunction is held to vindicate temporal becoming. Although many philosophers and physicists seek relief from relativity’s assault on time in quantum theory, assistance is not so easily found.


Author(s):  
Nuel Belnap ◽  
Thomas Müller ◽  
Tomasz Placek

This book develops a rigorous theory of indeterminism as a local and modal concept. Its crucial insight is that our world contains events or processes with alternative, really possible outcomes. The theory aims at clarifying what this assumption involves, and it does it in two ways. First, it provides a mathematically rigorous framework for local and modal indeterminism. Second, we support that theory by spelling out the philosophically relevant consequences of this formulation and by showing its fruitful applications in metaphysics. To this end, we offer a formal analysis of modal correlations and of causation, which is applicable in indeterministic and non-local contexts as well. We also propose a rigorous theory of objective single-case probabilities, intended to represent degrees of possibility. In a third step, we link our theory to current physics, investigating how local and modal indeterminism relates to issues in the foundations of physics, in particular, quantum non-locality and spatio-temporal relativity. The book also ventures into the philosophy of time, showing how the theory’s resources can be used to explicate the dynamic concept of the past, present, and future based on local indeterminism.


2010 ◽  
Vol 6 (3) ◽  
pp. 151-153 ◽  
Author(s):  
Sandu Popescu

2013 ◽  
Vol 58 ◽  
pp. 01014
Author(s):  
Alessio Avella ◽  
Marco Gramegna ◽  
Marco Genovese

2012 ◽  
Vol 8 (12) ◽  
pp. 867-870 ◽  
Author(s):  
J-D. Bancal ◽  
S. Pironio ◽  
A. Acín ◽  
Y-C. Liang ◽  
V. Scarani ◽  
...  

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