Discrimination of Non-Local Correlations

Secure positioning and quantum non-local correlations

Recently, the problem of quantum position-verification has been extensively analyzed in the formal notion but all existing ceremonial single-round position-verification schemes are insecure. We propose here a different notion for position-verification where distant verifiers determine the actions of the prover through quantum non-local correlations generated by local measurements at the provers...

Entanglement swapping for generalized non-local correlations

We consider an analogue of entanglement-swapping for a set of black boxes with the most general non-local correlations consistent with relativity (including correlations which are stronger than any attainable in quantum theory). In an attempt to incorporate this phenomenon, we consider expanding the space of objects to include not only correlated boxes, but ‘couplers’, which are an analogue for...

Maximally Non-Local and Monogamous Quantum Correlations

We introduce a version of the chained Bell inequality for an arbitrary number of measurement outcomes and use it to give a simple proof that the maximally entangled state of two d-dimensional quantum systems has no local component. That is, if we write its quantum correlations as a mixture of local correlations and general (not necessarily quantum) correlations, the coefficient of the local cor...

Bit Commitment from Non-Local Correlations

Central cryptographic functionalities such as encryption, authentication, or secure two-party computation cannot be realized in an information-theoretically secure way from scratch. This serves as a motivation to study what (possibly weak) primitives they can be based on. We consider as such starting points general two-party input-output systems that do not allow for message transmission, and s...

From local to non-local correlations: the Dual Boson perspective