scholarly journals Experimental Diagnostics of Entanglement Swapping by a Collective Entanglement Test

2020 ◽  
Vol 14 (6) ◽  
Author(s):  
Vojtěch Trávníček ◽  
Karol Bartkiewicz ◽  
Antonín Černoch ◽  
Karel Lemr
2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Elisa Bäumer ◽  
Nicolas Gisin ◽  
Armin Tavakoli

AbstractIncreasingly sophisticated quantum computers motivate the exploration of their abilities in certifying genuine quantum phenomena. Here, we demonstrate the power of state-of-the-art IBM quantum computers in correlation experiments inspired by quantum networks. Our experiments feature up to 12 qubits and require the implementation of paradigmatic Bell-State Measurements for scalable entanglement-swapping. First, we demonstrate quantum correlations that defy classical models in up to nine-qubit systems while only assuming that the quantum computer operates on qubits. Harvesting these quantum advantages, we are able to certify 82 basis elements as entangled in a 512-outcome measurement. Then, we relax the qubit assumption and consider quantum nonlocality in a scenario with multiple independent entangled states arranged in a star configuration. We report quantum violations of source-independent Bell inequalities for up to ten qubits. Our results demonstrate the ability of quantum computers to outperform classical limitations and certify scalable entangled measurements.


2011 ◽  
Vol 58 (7) ◽  
pp. 593-598 ◽  
Author(s):  
Ye-Qi Zhang ◽  
Jing-Bo Xu

2013 ◽  
Vol 377 (40) ◽  
pp. 2870-2876 ◽  
Author(s):  
Hong-Fu Wang ◽  
Jing-Ji Wen ◽  
Ai-Dong Zhu ◽  
Shou Zhang ◽  
Kyu-Hwang Yeon

2021 ◽  
Author(s):  
Sofiane Merkouche ◽  
Valerian Thiel ◽  
Alex O.C. Davis ◽  
Brian J. Smith

2006 ◽  
Vol 97 (15) ◽  
Author(s):  
Stefano Pirandola ◽  
David Vitali ◽  
Paolo Tombesi ◽  
Seth Lloyd

1999 ◽  
Vol 60 (1) ◽  
pp. 194-197 ◽  
Author(s):  
S. Bose ◽  
V. Vedral ◽  
P. L. Knight

2004 ◽  
Vol 53 (11) ◽  
pp. 3733
Author(s):  
Lai Zhen-Jiang ◽  
Yang Zhi-Yong ◽  
Bai Jin-Tao ◽  
Sun Zhong-Yu

Author(s):  
Robert L. Doney ◽  
John H. J. Niederhaus ◽  
Timothy J. Fuller ◽  
Matthew J. Coppinger

Abstract Metallic shaped charge jets (SCJ) have been studied for many decades across multiple communities for applications ranging from military warheads to earth penetrators for accessing oil-rich areas [1]. Researchers have had varied success in modeling these jets using simulation codes such as CTH, ALEGRA, and ALE3D. Recently, a large amount of work has been performed at the US Army Research Lab investigating the behavior of jets with increasingly sophisticated experimental diagnostics. Advances in computational resources, code enhancements, and material models have allowed us to model jets and probe uncertainties caused by algorithms, equations of state (EOS), constitutive models, and any of the available parameters each one provides. In this work we explore the effects that various EOS and constitutive models have on the development and characteristics of a 65-mm diameter, 2D copper SCJ using the Sandia National Laboratories’ multiphysics hydrocode, ALEGRA [2]. Specifically, we evaluate the tabular SESAME 3320 [3], 3325 [4-5], and 3337 [6] EOS models, analytic EOS (ANEOS) 3331 [7], as well as the Johnson-Cook (JC) [8], Zerilli-Armstrong (ZA) [9], Preston-Tonks-Wallace (PTW) [10], Steinberg-Guinan-Lund (SGL) [11-12], and Mechanical Threshold Stress (MTS) [13] constitutive models. Note that while the SGL model supports rate-dependence, there is no current characterization for copper, thus we are using rate-independent version. We do not consider the MieGrüneisen equation of state here as we expect parts of the jet to be near or cross into melt.


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