Practically Enhanced Hyperentanglement Concentration for Polarization-Spatial Hyperentangled Bell States with Linear Optics and Common Single-Photon Detectors

Jiang, Gui-Long; Liu, Wen-Qiang; Wei, Hai‐Rui

doi:10.1103/physrevapplied.19.034044

Cited by 13 publications

(2 citation statements)

References 63 publications

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“…Quantum communication is a promising and flourishing research for its security and efficiency. Many theoretical and experimental works has been proposed on quantum key distribution [11][12][13], quantum teleportation [14][15][16], quantum secure direct communication [17][18][19], entanglement purification and concentration [20][21][22][23][24][25], quantum dense coding [26][27][28] and quantum secret sharing [29][30][31]. Quantum teleportation has proved to be a powerful tool in quantum communication, it is essential to measurement-device-independent quantum key distribution [32], device-independent quantum secure direct communication [33][34][35] and quantum repeater [36,37].…”

Section: Introductionmentioning

confidence: 99%

The simplified quantum circuits for implementing quantum teleportation

Zhang,

Song,

Wei

2024

Preprint

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It is crucial to design quantum circuits as small as possible and as shallow as possible for quantum information processing tasks. We design quantum circuits with simplified gate-count, cost, and depth for implementing quantum teleportation among various entangled channels. Here the gate-count/cost/depth of the Greenberger-Horne-Zeilinger-based quantum teleportation is reduced from 10/6/8 to 9/4/6, the two-qubit-cluster-based quantum teleportation is reduced from 9/4/5 to 6/3/5, the three-qubit-cluster-based quantum teleportation is reduced from 12/6/7 to 8/4/5, the Brown-based quantum teleportation is reduced from 25/15/17 to 18/8/7, the Borras-based quantum teleportation is reduced from 36/25/20 to 15/8/11, and the entanglement-swapping-based quantum teleportation is reduced from 13/8/8 to 10/5/5. Note that, no feed-forward recover operation is required in the simplified schemes. Moreover, the experimentally demonstrations on IBM quantum computer indicate that our simplified and compressed schemes can be realized with good fidelity.

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Section: Introductionmentioning

confidence: 99%

The simplified quantum circuits for implementing quantum teleportation

Zhang,

Song,

Wei

2024

Preprint

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“…Moreover, the efficiency of cross-Kerr-nonlinearities-based ECP [51] can also be increased by iteration of the entanglement concentration process. In 2013, Ren et al first proposed two hyperentanglement concentration protocols (hyper-ECPs) in polarization-spatial hyperentangled states only with some linear-optics elements [62], without nonlinear optical properties [28,[63][64][65][66][67][68][69]. So far, the existing hyper-ECPs focused on partially hyperentangled states in the polarization and spatial degrees of freedom (DoFs) [28,[62][63][64], the ones in the polarization and time-bin DoFs [65,66], polarization, spatial, and time-bin DoFs [67,68], polarization and orbital angular momentum DoFs [69].…”

Section: Introductionmentioning

confidence: 99%

Compact entanglement concentration for three-electron-spin W states with error-detected parity-check gates

Fan¹,

Ren²,

Du³

2023

Laser Phys.

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We present a compact entanglement concentration protocol (ECP) for unknown less-entangled three-electron-spin W states, resorting to the interaction rules between the circularly polarized photon and cavity-quantum-dot (QD) system. In the first step of our ECP, the parties utilize two less-entangled three-electron-spin systems not only to obtain one partially entangled three-electron-spin system with two unknown parameters if the odd-parity occurs with the parity-check gate (PCG) but also to get one entangled two-electron-spin system if the even-parity occurs. By exploiting the above three-electron-spin and two-electron-spin systems as the resource for the second step of our ECP, the parties can obtain a standard three-electron-spin W state if the odd parity occurs. Meanwhile, the systems in the even-parity instance can be used as the resource in the next round of our ECP. As the imperfect performances originated from the side leakage and the limited coupling strength of the cavity-QD system can be reflected by clicking the single-photon detectors, the fidelity of the PCG is unit, in principle, immune to strong coupling-strength restriction. Moreover, the success of our ECP not only is heralded by the detectors but also its efficiency further is improved by repeating the operation processes. Therefore, our ECP is useful in the quantum communication network.

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The Simplified Quantum Circuits for Implementing Quantum Teleportation

Zhang,

Song,

Wei

2024

Annalen der Physik

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It is crucial to design quantum circuits as small as possible and as shallow as possible for quantum information processing tasks. Quantum circuits are designed with simplified gate‐count, cost, and depth for implementing quantum teleportation among various entangled channels. Here, the gate‐count/cost/depth of the Greenberger‐Horne‐Zeilinger‐based quantum teleportation is reduced from 10/6/8 to 9/4/6, the two‐qubit‐cluster‐based quantum teleportation is reduced from 9/4/5 to 6/3/5, the three‐qubit‐cluster‐based quantum teleportation is reduced from 12/6/7 to 8/4/5, the Brown‐based quantum teleportation is reduced from 25/15/17 to 18/8/7, the Borras‐based quantum teleportation is reduced from 36/25/20 to 15/8/11, and the entanglement‐swapping‐based quantum teleportation is reduced from 13/8/8 to 10/5/5. Note that, no feed‐forward recover operation is required in the simplified schemes. Moreover, the experimentally demonstrations on IBM quantum computer indicate that the simplified and compressed schemes can be realized with good fidelity.

show abstract

Practically Enhanced Hyperentanglement Concentration for Polarization-Spatial Hyperentangled Bell States with Linear Optics and Common Single-Photon Detectors

Cited by 13 publications

References 63 publications

The simplified quantum circuits for implementing quantum teleportation

The simplified quantum circuits for implementing quantum teleportation

Compact entanglement concentration for three-electron-spin W states with error-detected parity-check gates

The Simplified Quantum Circuits for Implementing Quantum Teleportation

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