Experimental self-testing for photonic graph states

• URL: http://arxiv.org/abs/2111.07562v1
• Date: Mon, 15 Nov 2021 07:26:15 GMT
• Title: Experimental self-testing for photonic graph states
• Authors: Jia-Min Xu, Qing Zhou, Yu-Xiang Yang, Zi-Mo Cheng, Xin-Yu Xu, Zhi-Cheng Ren, Xi-Lin Wang, Hui-Tian Wang
• Abstract summary: We have experimentally demonstrated device-independent certification for multipartite graph states. Our work paves the way to the device-independent certification of complex multipartite quantum states.
• Score: 8.032105713088473
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: 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.

Related papers

• Machine-learning certification of multipartite entanglement for noisy quantum hardware [1.204553980682492]
  Entanglement is a fundamental aspect of quantum physics, both conceptually and for its many applications. We develop a certification pipeline that feeds statistics of random local measurements into a non-linear dimensionality reduction algorithm. We verify the accuracy of its predictions on simulated test data, and apply it to states prepared on IBM quantum computing hardware.
  arXiv  Detail & Related papers  (2024-08-22T12:47:58Z)
• Probing many-body Bell correlation depth with superconducting qubits [17.3215930037341]
  We report an experimental certification of genuine multipartite Bell correlations, which signal nonlocality in quantum many-body systems. In particular, we employ energy as a Bell correlation witness and variationally decrease the energy of a many-body system across a hierarchy of thresholds. Our results establish a viable approach for preparing and certifying multipartite Bell correlations, which provide a finer benchmark beyond entanglement for quantum devices.
  arXiv  Detail & Related papers  (2024-06-25T18:00:00Z)
• Benchmarking Multipartite Entanglement Generation with Graph States [0.0]
  We experimentally verify that a fully bipartite entangled state can be prepared on a 127-qubit IBM Quantum superconducting QPU. We also find that genuine multipartite entanglement can be detected for states of up to 23 qubits with quantum readout error mitigation.
  arXiv  Detail & Related papers  (2024-02-01T16:55:07Z)
• Measurement-Device-Independent Detection of Beyond-Quantum State [53.64687146666141]
  We propose a measurement-device-independent (MDI) test for beyond-quantum state detection. We discuss the importance of tomographic completeness of the input sets to the detection.
  arXiv  Detail & Related papers  (2023-12-11T06:40:13Z)
• Efficient Bipartite Entanglement Detection Scheme with a Quantum Adversarial Solver [89.80359585967642]
  Proposal reformulates the bipartite entanglement detection as a two-player zero-sum game completed by parameterized quantum circuits. We experimentally implement our protocol on a linear optical network and exhibit its effectiveness to accomplish the bipartite entanglement detection for 5-qubit quantum pure states and 2-qubit quantum mixed states.
  arXiv  Detail & Related papers  (2022-03-15T09:46:45Z)
• Quantum-Memory-Enhanced Preparation of Nonlocal Graph States [10.086067943202416]
  Graph states are an important class of multipartite entangled states. We show an efficient scheme to prepare graph states with only two atomic excitations in quantum networks. Our work demonstrates the prospect of efficient generation of multipartite entangled states in large-scale distributed systems.
  arXiv  Detail & Related papers  (2022-02-27T15:42:09Z)
• Self-testing of multipartite GHZ states of arbitrary local dimension with arbitrary number of measurements per party [0.0]
  Device independent certification schemes have gained a lot of interest lately. strongest form of device independent certification, known as self-testing, often requires for a Bell inequality to be maximally violated. We provide the first self-testing scheme for the multipartite Greenberger-Horne-Zeilinger (GHZ) states of arbitrary local dimension.
  arXiv  Detail & Related papers  (2021-12-20T21:26:52Z)
• Experimental violations of Leggett-Garg's inequalities on a quantum computer [77.34726150561087]
  We experimentally observe the violations of Leggett-Garg-Bell's inequalities on single and multi-qubit systems. Our analysis highlights the limits of nowadays quantum platforms, showing that the above-mentioned correlation functions deviate from theoretical prediction as the number of qubits and the depth of the circuit grow.
  arXiv  Detail & Related papers  (2021-09-06T14:35:15Z)
• Sample-efficient device-independent quantum state verification and certification [68.8204255655161]
  Authentication of quantum sources is a crucial task in building reliable and efficient protocols for quantum-information processing. We develop a systematic approach to device-independent verification of quantum states free of IID assumptions in the finite copy regime. We show that device-independent verification can be performed with optimal sample efficiency.
  arXiv  Detail & Related papers  (2021-05-12T17:48:04Z)
• Heterogeneous Multipartite Entanglement Purification for Size-Constrained Quantum Devices [68.8204255655161]
  Purifying entanglement resources after their imperfect generation is an indispensable step towards using them in quantum architectures. Here we depart from the typical purification paradigm for multipartite states explored in the last twenty years. We find that smaller sacrificial' states, like Bell pairs, can be more useful in the purification of multipartite states than additional copies of these same states.
  arXiv  Detail & Related papers  (2020-11-23T19:00:00Z)
• Einselection from incompatible decoherence channels [62.997667081978825]
  We analyze an open quantum dynamics inspired by CQED experiments with two non-commuting Lindblad operators. We show that Fock states remain the most robust states to decoherence up to a critical coupling.
  arXiv  Detail & Related papers  (2020-01-29T14:15:19Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.