Error-heralded generation and self-assisted complete analysis of two-photon hyperentangled Bell states through single-sided quantum-dot-cavity systems

Liang, Lei-Xia; Mei, Zhang

doi:10.1007/s11433-018-9338-8

Cited by 14 publications

(4 citation statements)

References 78 publications

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“…2a). It is worth noting that Bell-state measurement (analysis) is one of the key element in quantum teleportation protocols and has been widely studied especially in optical systems [64][65][66][67][68][69][70][71][72]; on the other hand, the Bell-state measurement performed on the universal IBM quantum computer is implemented by using universal logic gates followed by measurement on the Pauli-Z basis ( Fig. 3c).…”

Section: Measurement Performed By Alice Alice Performsmentioning

confidence: 99%

Identification of networking quantum teleportation on 14-qubit IBM universal quantum computer

Huang

2020

Sci Rep

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Quantum teleportation enables networking participants to move an unknown quantum state between the nodes of a quantum network, and hence constitutes an essential element in constructing large-sale quantum processors with a quantum modular architecture. Herein, we propose two protocols for teleporting qubits through an N -node quantum network in a highly-entangled box-cluster state or chain-type cluster state. The proposed protocols are systematically scalable to an arbitrary finite number N and applicable to arbitrary size of modules. The protocol based on a box-cluster state is implemented on a 14-qubit IBM quantum computer for N up to 12. To identify faithful networking teleportation, namely that the elements on real devices required for the networking teleportation process are all qualified for achieving teleportation task, we quantify quantum-mechanical processes using a generic classical-process model through which any classical strategies of mimicry of teleportation can be ruled out. From the viewpoint of achieving a genuinely quantum-mechanical process, the present work provides a novel toolbox consisting of the networking teleportation protocols and the criteria for identifying faithful teleportation for universal quantum computers with modular architectures and facilitates further improvements in the reliability of quantum-information processing.

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Section: Measurement Performed By Alice Alice Performsmentioning

confidence: 99%

Identification of networking quantum teleportation on 14-qubit IBM universal quantum computer

Huang

2020

Sci Rep

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“…With the help of optical microcavities or nanocavities, effective coupling between photons and singly charged QDs can be realized in coupled QD-cavity systems, which is crucial for realizing various quantum interfaces between single photons and spins [57][58][59][60]. With the photon-spin quantum interfaces, many QIP schemes such as universal quantum logic gates [61][62][63][64][65][66][67], quantum entanglement generation and analysis [68][69][70][71][72][73], and quantum entanglement purification and concentration [74-77] have been proposed. The QD-cavity systems supply ideal platforms for implementing quantum networks by constituting the quantum nodes and providing photon-spin interfaces [78,79].…”

Section: Introductionmentioning

confidence: 99%

Scheme for implementing nonlocal high-fidelity quantum controlled-not gates on quantum-dot-confined electron spins using optical microcavities and photonic hyperentanglement

et al. 2022

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Quantum information networks can transmit quantum states and perform quantum operations between different quantum network nodes, which are essential for various applications of quantum information technology in the future. In this paper, a potentially practical scheme for implementing nonlocal quantum controlled-not (CNOT) gate operations on quantum-dot-confined electron spins between two quantum network nodes is presented. The scheme can realize parallel teleportation of two nonlocal quantum CNOT gates simultaneously by employing hyperentangled photon pairs to establish quantum channel, which can effectively improve the channel capacity and operational speed. The core of the scheme are two kinds of photon-spin hybrid quantum CNOT gate working in a failure-heralded and fidelity-robust fashion. With the heralded mechanism, the nonlocal CNOT gates can be implementated with unity fidelities in principle, even if the particularly ideal conditions commonly used in other schemes are not satisfied strictly. Our analysis and calculations indicate that the scheme can be demonstrated efficiently (with efficiency exceeding 99%) with current or near-future technologies. Moreover, the utilized photon-spin hybrid quantum gates can be regarded as universal modules for many other quantum information processing (QIP) tasks. Therefore, the scheme is potential for constructing elementary quantum networks, and realizing nolocal QIP with high channel capacities, high fidelities, and high efficiencies.

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“…Later some improved works were proposed [47][48][49]. Nowadays, atoms, quantum dots, nitrogen-vacancy centers, and superconductors have been introduced to complete deterministic HBSA [50][51][52][53][54][55]. Realizing strong natural Kerr nonlinearities are challenge in experiment with current technology.…”

Section: Introductionmentioning

confidence: 99%

Deterministic and complete hyperentangled Bell states analysis assisted by frequency and time interval degrees of freedom

Zhou,

Liu,

Wei

et al. 2022

Preprint

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Hyperentangled Bell states analysis (HBSA) is an essential building block for certain hyper-parallel quantum information processing. We propose a complete and deterministic HBSA scheme encoded in spatial and polarization degrees of freedom (DOFs) of two-photon system assisted by a fixed frequency-based entanglement and a time interval DOF. The parity information the spatial-based and polarization-based hyper-entanglement can be distinguished by the distinct time intervals of the photon pairs, and the phase information can be distinguished by the detection signature. Compared with previous schemes, the number of the auxiliary entanglements is reduced from two to one by introducing time interval DOF. Moreover, the additional frequency and time interval DOFs suffer less from the collective channel noise.

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Error-heralded generation and self-assisted complete analysis of two-photon hyperentangled Bell states through single-sided quantum-dot-cavity systems

Cited by 14 publications

References 78 publications

Identification of networking quantum teleportation on 14-qubit IBM universal quantum computer

Identification of networking quantum teleportation on 14-qubit IBM universal quantum computer

Scheme for implementing nonlocal high-fidelity quantum controlled-not gates on quantum-dot-confined electron spins using optical microcavities and photonic hyperentanglement

Deterministic and complete hyperentangled Bell states analysis assisted by frequency and time interval degrees of freedom

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