Deterministic Distribution of Multipartite Entanglement and Steering in a Quantum Network by Separable States

Wang, Meihong; Yu, X. D.; Kang, Haijun; Dong-mei, Han; Liu, Yang; He, Qichun; Gong, Qihuang; Su, Xiaolong; Peng, Kunchi

doi:10.1103/physrevlett.125.260506

Cited by 41 publications

(24 citation statements)

References 54 publications

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“…As an intermediate type of quantum correlations between entanglement and Bell nonlocality, multipartite quantum steering [23] has received extensive attention in recent developments of quantum information theory [24,25]. It has been successfully implementated in CV optical network [26][27][28][29], photonic network [30][31][32], and atomic ensembles [33]. Inspired by the shareability of EPR steering, known as monogamy [34][35][36][37][38][39][40], it is interesting to explore how can the remotely generated Wigner negativity be distributed over different modes?…”

mentioning

confidence: 99%

Quantification of Wigner Negativity Remotely Generated via Einstein-Podolsky-Rosen Steering

Xiang,

Liu,

Guo

et al. 2021

Preprint

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confidence: 99%

Quantification of Wigner Negativity Remotely Generated via Einstein-Podolsky-Rosen Steering

Xiang,

Liu,

Guo

et al. 2021

Preprint

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“…The front face of the KTP crystal is coated to be used for the input coupler and the concave mirror serves as the output coupler of the NOPA. The details of parameters of the NOPA have been provided elsewhere [35][36][37]. Our NOPA cavity is locked by using the Lock-and-hold technique (See Appendix A for details).…”

Section: Experimental Setup and Resultsmentioning

confidence: 99%

Remote preparation and manipulation of squeezed light

Dong-mei

Wang

et al. 2022

Opt. Lett.

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Remote state preparation enables one to create and manipulate a quantum state based on the shared entanglement between distant nodes. Here, we experimentally demonstrate remote preparation and manipulation of squeezed light. By performing a homodyne projective measurement on one mode of the continuous variable entangled state at Alice’s station, a squeezed state is created at Bob’s station. Moreover, rotation and displacement operations are applied on the prepared squeezed state by changing the projective parameters on Alice’s state. We also show that the remotely prepared squeezed state is robust against loss and N − 1 squeezed states can be remotely prepared based on an N-mode continuous variable Greenberger–Horne–Zeilinger-like state. Our results verify the entanglement-based model used in security analysis of quantum key distribution with continuous variables and have potential application in remote quantum information processing.

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“…The noisy channel is modeled by combining the Pr field with an auxiliary beam at a PBS followed by a HWP and a PBS. The auxiliary beam carries the same frequency and topological charge with the Pr field, and is modulated by an amplitude modulator and a phase modulator with white noise [16]. To characterize the OAM multiplexed CV entangled state, its covariance matrix (CM) is experimentally measured by utilizing two sets of balanced homodyne detectors (BHDs).…”

Section: The Principle and Experimental Setupmentioning

confidence: 99%

“…Besides entanglement, quantum steering, which stands between entanglement [1] and Bell nonlocality [6] in the hierarchy of quantum correlations [7], has been identified as a useful quantum resource. Different from entanglement and Bell nonlocality, quantum steering shows unique asymmetry or even one-way characteristics [8][9][10][11][12][13][14][15][16], and thus allows asymmetric quantum information processing. For example, quantum steering enables one-side device independent quantum key distribution [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Deterministic distribution of orbital angular momentum multiplexed continuous-variable entanglement and quantum steering

Zeng,

Ma,

Wen

et al. 2022

Preprint

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Orbital angular momentum (OAM) multiplexing provides an efficient method to improve data-carrying capacity in various quantum communication protocols. It is a precondition to distribute OAM multiplexed quantum resources in quantum channels for implementing quantum communication. However, quantum steering of OAM multiplexed optical fields and the effect of channel noise on OAM multiplexed quantum resources remain unclear. Here, we generate OAM multiplexed continuous-variable (CV) entangled states and distribute them in lossy or noisy channels. We show that the decoherence property of entanglement and quantum steering of the OAM multiplexed states carrying topological charges l = 1 and l = 2 are the same as that of the Gaussian mode with l = 0 in lossy and noisy channels. The sudden death of entanglement and quantum steering of high-order OAM multiplexed states is observed in the presence of excess noise. Our results demonstrate the feasibility to realize high data-carrying capacity quantum information processing by utilizing OAM multiplexed CV entangled states.

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Deterministic Distribution of Multipartite Entanglement and Steering in a Quantum Network by Separable States

Cited by 41 publications

References 54 publications

Quantification of Wigner Negativity Remotely Generated via Einstein-Podolsky-Rosen Steering

Quantification of Wigner Negativity Remotely Generated via Einstein-Podolsky-Rosen Steering

Remote preparation and manipulation of squeezed light

Deterministic distribution of orbital angular momentum multiplexed continuous-variable entanglement and quantum steering

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