Experimental violation of n-locality in a star quantum network[1]

Using a flexible and scalable photonic platform, we implement a star-shaped quantum network with five nodes and truly independent sources, and we violate a n-locality inequality to device-independently witness nonlocal correlations in the whole network.

[1]  N. Gisin,et al.  From Bell's theorem to secure quantum key distribution. , 2005, Physical review letters.

[2]  R. Cleve,et al.  Nonlocality and communication complexity , 2009, 0907.3584.

[3]  J. Bell.  On the Einstein-Podolsky-Rosen paradox , 1964 .

[4]  Xiongfeng Ma,et al.  High speed device-independent quantum random number generation without detection loophole , 2017, 2018 Conference on Lasers and Electro-Optics (CLEO).

[5]  J. Pearl.  Causality: Models, Reasoning and Inference , 2000 .

[6]  Ciarán M Lee,et al.  Towards Device-Independent Information Processing on General Quantum Networks. , 2017, Physical review letters.

[7]  Stefano Pironio,et al.  Random numbers certified by Bell’s theorem , 2009, Nature.

[8]  N. Gisin,et al.  Quantum Communication , 2007, quant-ph/0703255.

[9]  Armin Tavakoli,et al.  Nonlocal correlations in the star-network configuration , 2014, 1409.5702.

[10]  Adrian Kent,et al.  No signaling and quantum key distribution. , 2004, Physical review letters.

[11]  Rafael Chaves,et al.  Polynomial Bell Inequalities. , 2015, Physical review letters.

[12]  R Chaves,et al.  Unifying framework for relaxations of the causal assumptions in Bell's theorem. , 2014, Physical review letters.

[13]  S. Wehner,et al.  Quantum internet: A vision for the road ahead , 2018, Science.

[14]  N. Gisin,et al.  Bilocal versus nonbilocal correlations in entanglement-swapping experiments , 2011, 1112.4502.

[15]  R. Chaves,et al.  Experimental bilocality violation without shared reference frames , 2017, 1705.03309.

[16]  Nicolò Spagnolo,et al.  Experimental violation of n-locality in a star quantum network , 2020, Nature Communications.

[17]  Fabio Sciarrino,et al.  Perspective on experimental quantum causality , 2019 .

[18]  R. Chaves,et al.  Experimental violation of local causality in a quantum network , 2016, Nature Communications.

[19]  Nicolas Gisin,et al.  Quantum communication , 2017, 2017 Optical Fiber Communications Conference and Exhibition (OFC).

[20]  Salman Beigi,et al.  Genuine Quantum Nonlocality in the Triangle Network. , 2019, Physical review letters.

[21]  Judea Pearl.  Causality by Judea Pearl , 2009 .

[22]  H. J. Kimble,et al.  The quantum internet , 2008, Nature.

[23]  Fabio Sciarrino,et al.  Quantum violation of an instrumental test , 2018, Quantum Information and Measurement (QIM) V: Quantum Technologies.

[24]  Ekert,et al.  Quantum cryptography based on Bell's theorem. , 1991, Physical review letters.

[25]  G. Pryde,et al.  Experimental demonstration of nonbilocal quantum correlations , 2016, Science Advances.