Experimental Realization of Robust Self-Testing of Bell State Measurements

Zhang, Wen-Hao; Chen, Geng; Peng, Xi; Ye, Xiang-Jun; Yin, Peng; Xu, Xiao‐Ye; Xu, Jin‐Shi; Li, Chuan‐Feng; Guo, Guang‐Can

doi:10.1103/physrevlett.122.090402

Cited by 25 publications

(9 citation statements)

References 30 publications

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“…In practice, measurements up to some local isometry. Since all pure bipartite entangled states and the measurements could be self-tested [30,31], conrmed in recent experiments [32,33], it further follows from Eq. (2) that we are able to construct a DI steering inequality [34] W DI = a,c,j g c,j a j P (a, Yes, c |x = j, B, z = j) ≤ 0, (3) for every steerable state.…”

Section: Resultsmentioning

confidence: 68%

Device-independent verification of Einstein-Podolsky-Rosen steering

Zhao¹,

Zhang²,

Cheng³

et al. 2021

Preprint

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If the presence of entanglement could be certified in a device-independent (DI) way, it is likely to provide various quantum information processing tasks with unconditional security. Recently, it was shown that a DI protocol, combining measurement-device-independent techniques with self-testing, is able to verify all entangled states, however, it imposes demanding requirements on its experimental implementation. In this work, we propose a much less-demanding protocol based on Einstein-Podolsky-Rosen (EPR) steering to certify entanglement. We establish a complete framework for DI verification of EPR steering in which all steerable states could be verified. We then analyze its robustness towards noise and imperfections of self-testing by considering the measurement scenario with three settings at each side. Finally, a four-photon experiment is implemented to demonstrate that even Bell local states can be device-independently verified. Our work may pave the way for realistic applications of secure quantum information tasks.

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Section: Resultsmentioning

confidence: 68%

Device-independent verification of Einstein-Podolsky-Rosen steering

Zhao¹,

Zhang²,

Cheng³

et al. 2021

Preprint

Self Cite

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“…This process, including |Φ + d and Charlie's measurements with a quantum realization of {τ b,j }, can be uniquely determined or self-tested via certain Bell inequality because its maximal violation determines can only be achieved by a certain state and specific measurements up to some local isometry. Since all pure bipartite entangled states and the measurements could be self-tested [30,31], confirmed in recent experiments [32,33], it leads us to conclude that in principle we can construct a DI steering inequality [34] W DI = a,c,j g c,j a j P (a, Yes, c |x = j, B, z = j) ≤ 0, (3) from the quantum-refereed witness as per Eq. (2) for every steerable state.…”

mentioning

confidence: 63%

Device-independent verification of Einstein-Podolsky-Rosen steering

Zhao¹,

Zhang²,

Cheng³

et al. 2019

Preprint

Self Cite

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If the presence of entanglement could be certified in a device-independent (DI) way, it is likely to provide various quantum information processing tasks with unconditional security. Recently, it was shown that a DI protocol, combining measurement-device-independent techniques with selftesting, is able to verify all entangled states, however, it imposes demanding requirements on its practical implementation. Here, we present a less-demanding protocol based on Einstein-Podolsky-Rosen (EPR) steering, which is achievable with current technology. Particularly, we first establish a complete framework for DI verification of EPR steering and show that all steerable states can be verified. Then, we analyze the three-measurement setting case, allowing for imperfections of self-testing. Finally, a four-photon experiment is implemented to device-independently verify EPR steering and to further demonstrate that even Bell local states can be faithfully verified. Our findings pave the way for realistic applications of secure quantum information tasks.

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“…However, due to the imperfect experimental systems, one cannot achieve the ideal self-testing results, i.e., the most self-testing methods are still only theoretical recipe. To realize the self-testing task in laboratory, many robust self-testing protocols have been developed to tolerate certain noise, in particular, some of them have also been successfully demonstrated in optical experiment [39,[43][44][45][46][47]. However, the experimental realization of self-testing for multipartite entanglement states has not been demonstrated yet.…”

Section: Introductionmentioning

confidence: 99%

Experimental self-testing for photonic graph states

Xu,

Zhou,

Yang

et al. 2021

Preprint

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Graph states-one of the most representative families of multipartite entangled states, are important resources for multiparty quantum communication, quantum error correction, and quantum computation. Device-independent certification of highly entangled graph states plays a prominent role in the quantum information processing tasks. Here we have experimentally demonstrated device-independent certification for multipartite graph states, by adopting the robust self-testing scheme based on scalable Bell inequalities. Specifically, the prepared multi-qubit Greenberger-Horne-Zeilinger (GHZ) states and linear cluster states achieve a high degree of Bell violation, which are beyond the nontrivial bounds of the robust self-testing scheme. Furthermore, our work paves the way to the device-independent certification of complex multipartite quantum states.

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Experimental Realization of Robust Self-Testing of Bell State Measurements

Cited by 25 publications

References 30 publications

Device-independent verification of Einstein-Podolsky-Rosen steering

Device-independent verification of Einstein-Podolsky-Rosen steering

Device-independent verification of Einstein-Podolsky-Rosen steering

Experimental self-testing for photonic graph states

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