scholarly journals Measurement incompatibility does not give rise to Bell violation in general

2018 ◽  
Vol 20 (1) ◽  
pp. 013021 ◽  
Author(s):  
Erika Bene ◽  
Tamás Vértesi
Keyword(s):  
2018 ◽  
Vol 121 (15) ◽  
Author(s):  
Lijiong Shen ◽  
Jianwei Lee ◽  
Le Phuc Thinh ◽  
Jean-Daniel Bancal ◽  
Alessandro Cerè ◽  
...  

Author(s):  
Marc Fleury

We describe results from a Monte-Carlo simulation of Bell-CHSH type correlations in hydrodynamic walkers. We study feasibility of a real life walker test with relevant hydrodynamic parametric ranges. We observe the generic formation of pairs of walkers strongly anti-correlated both in position and momentum. With this source of entangled walkers, we model the insertion of 2 pins in the bath as a notion of measure, akin to the polarizers of photonic Bell tests. This insertion of pins, either static or dynamic, introduces 2 weak field signals. Each field has the physical form of a standing wave Bessel hat, representing the non-local (field mediated) influences of the measure on the walkers. With this representation of the measure, we develop protocol for a Bell game with actual hydrodynamic walkers. We model both static and dynamic insertion of pins in the walker bath. Static pins give us numerical S > 2, as a permissible Bell violation for a non-local (field based) effect. Dynamic insertion of the pins, however, leads to causal space separation of the two arms. We observe the again expected S ≤ 2. We argue for the hydrodynamic implementation and observation of these effects as a walker visualization of Bell inequalities.


2012 ◽  
Vol 29 (5) ◽  
pp. 906 ◽  
Author(s):  
Jiyong Park ◽  
Su-Yong Lee ◽  
Hai-Woong Lee ◽  
Hyunchul Nha

2008 ◽  
Vol 06 (06) ◽  
pp. 1165-1181
Author(s):  
SHANG-BIN LI ◽  
JING-BO XU

The stationary entanglement and Bell violation of two qubits collectively interacting with a common thermal reservoir is investigated, and the analytical relations among average thermal photon number of the reservoir, entanglement and Bell violation of two qubits are given in detail. The initial fraction of Bell singlet state determines whether the common thermal reservoir can enhance the entanglement of two qubits or not in this case. Moreover, the stationary maximally entangled mixed state can emerge in the collective decay of two qubits in a thermal reservoir at zero-temperature only if the fraction of Bell singlet state in the initial state is not smaller than 2/3. Furthermore, it is shown that the collective decay can induce the entanglement of two qutrits initially in the maximally mixed state, and induce distillable entanglement from bound entangled states.


Universe ◽  
2017 ◽  
Vol 3 (1) ◽  
pp. 13 ◽  
Author(s):  
Sayantan Choudhury ◽  
Sudhakar Panda ◽  
Rajeev Singh
Keyword(s):  

Quantum ◽  
2018 ◽  
Vol 2 ◽  
pp. 82 ◽  
Author(s):  
Erik Woodhead ◽  
Boris Bourdoncle ◽  
Antonio Acín

The detection of nonlocal correlations in a Bell experiment implies almost by definition some intrinsic randomness in the measurement outcomes. For given correlations, or for a given Bell violation, the amount of randomness predicted by quantum physics, quantified by the guessing probability, can generally be bounded numerically. However, currently only a few exact analytic solutions are known for violations of the bipartite Clauser-Horne-Shimony-Holt Bell inequality. Here, we study the randomness in a Bell experiment where three parties test the tripartite Mermin-Bell inequality. We give tight upper bounds on the guessing probabilities associated with one and two of the parties' measurement outcomes as a function of the Mermin inequality violation. Finally, we discuss the possibility of device-independent secret sharing based on the Mermin inequality and argue that the idea seems unlikely to work.


2012 ◽  
Vol 66 (11) ◽  
Author(s):  
Y. Yao ◽  
H. W. Li ◽  
M. Li ◽  
Z. Q. Yin ◽  
W. Chen ◽  
...  

2019 ◽  
Vol 21 (10) ◽  
pp. 103008
Author(s):  
Shuai Zhao ◽  
Wen-Fei Cao ◽  
Yi-Zheng Zhen ◽  
Changchen Chen ◽  
Li Li ◽  
...  
Keyword(s):  

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