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Quantum correlations "now and then" are weirder than "here and there"
Quantum correlations Quantum Physics
2010/11/8
Tests such as Bell’s inequality and Hardy’s paradox highlight the differences between local realistic theories and quantum predictions for measurement probabilities and correlations between distant pa...
Extremal Quantum Correlations and Cryptographic Security
Extremal Quantum Correlations Cryptographic Security
2010/10/29
We investigate fundamental properties of device independent security in quantum cryptography and show a one-to-one correspondence between extremal and secure probability distributions. This allows us ...
Do revivals of quantum correlations necessarily require quantum noise?
revivals quantum correlations necessarily quantum noise
2010/10/21
We show that in an N-partite system, where each subsystem is subject to a local completely
positive map, total correlations cannot, at later times, exceed their initial value. We then analyze the dyn...
We discuss a cluster-like 1D system with triplet interaction. We study the topological properties of this system. We find that the degeneracy depends on the topology of the system, and well protected ...
Charm Hadronic Decays and Quantum Correlations at CLEO-c
charm mesons hadronic decays quantum correlations CKM matrix
2010/5/7
Several recent CLEO-c results on hadronic decays of charm mesons are reviewed. Topics include measurements of precision branching fractions for exclusive modes, investigations of inclusive rates, and ...
There is no spooky action-at-a-distance in quantum correlations: Resolution of the EPR nonlocality puzzle
spooky action-at-a-distance quantum correlations: Resolution EPR nonlocality puzzle
2010/10/18
The long-standing puzzle of the nonlocal Einstein-Podolsky-Rosen correlations is resolved. The correct quantum mechanical correlations arise for the case of entangled particles when strict locality is...
Quantum Correlations in Inflationary Spectra and Violation of Bell Inequalities
Quantum Correlations Inflationary Spectra Violation of Bell Inequalities
2010/10/18
In spite of the macroscopic character of the fluctuation amplitudes, we show that the standard inflationary distribution of primordial density fluctuations still exhibits inherently quantum mechanical...
Superluminal Hidden Communication as the Underlying Mechanism for Quantum Correlations: Constraining Models
Superluminal Hidden Communication the Underlying Mechanism Quantum Correlations
2010/10/13
Since Bell’s theorem, it is known that quantum correlations cannot be described by local variables (LV) alone: if one does not want to abandon classical mechanisms for correlations, a superluminal for...