High-rate qutrit entanglement swapping with photon-number-basis

• URL: http://arxiv.org/abs/2507.04322v3
• Date: Thu, 10 Jul 2025 07:07:10 GMT
• Title: High-rate qutrit entanglement swapping with photon-number-basis
• Authors: Kazufumi Tanji, Hikaru Shimizu, Masahiro Takeoka,
• Abstract summary: Entanglement generation between distant nodes is a fundamental process in distributed quantum information processing.<n>We propose a novel entanglement swapping protocol specifically designed for qutrits.<n>We show that the proposed qutrit protocol can achieve higher entanglement generation rates compared to conventional two-photon detection-based qubit protocols.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Entanglement generation between distant nodes is a fundamental process in distributed quantum information processing. Qudits, high-dimensional quantum states, are promising candidates for enhancing entanglement distribution capabilities. However, the success probability of qudit entanglement distribution using Bell measurements is typically lower than that of conventional qubit-based protocols. In this paper, we propose a novel entanglement swapping protocol specifically designed for qutrits (three-dimensional quantum states). Our protocol employs photon-number encoding combined with an additional mode basis, such as polarization, effectively increasing the success probability. We show that the proposed qutrit protocol can achieve higher entanglement generation rates compared to conventional two-photon detection-based qubit protocols, especially under conditions of limited photon generation probability. Furthermore, we evaluate our protocol under realistic experimental imperfections, including photon loss and threshold detection, and show that it achieves high fidelity with probabilistic photon sources.

Related papers

• Design Tradeoffs in Photonically Linked Qubit Networks [0.0]
  Quantum networking can be realized by distributing pairs of entangled qubits between remote quantum processing nodes.<n>We consider two such protocols based on trapped ion communication qubits strongly coupled to small optical cavities.<n>We find that adoption of the strong-coupling protocols could provide substantial distribution rate improvements of $30-75%$ while maintaining the high-fidelities.
  arXiv  Detail & Related papers  (2025-06-06T17:50:32Z)
• Superior decoy state and purification quantum key distribution protocols for realistic quantum-dot based single photon sources [0.35342120781147623]
  We experimentally emulate two simple-to-implement protocols that allow practical, far from ideal sub-Poissonian photon sources to outperform state-of-the-art WCS. By engineering the photon statistics of a quantum dot's biexciton-exciton cascade, we show that either a truncated decoy state protocol or a heralded purification protocol can be employed.
  arXiv  Detail & Related papers  (2024-09-12T11:07:50Z)
• Phase-Matching Quantum Key Distribution without Intensity Modulation [25.004151934190965]
  We propose a phase-matching quantum key distribution protocol without intensity modulation. Simulation results show that the transmission distance of our protocol could reach 305 km in telecommunication fiber. Our protocol provides a promising solution for constructing quantum networks.
  arXiv  Detail & Related papers  (2023-03-21T04:32:01Z)
• New protocols for quantum key distribution with explicit upper and lower bound on secret key rate [0.0]
  We present two new schemes for quantum key distribution (QKD) that neither require entanglement nor an ideal single-photon source.<n>These protocols are shown to be secure against multiple attacks, including intercept-resend and a class of collective attacks.<n>A trade-off between quantum resources and information revealed to an eavesdropper (Eve) is observed, with higher efficiency achievable through the use of additional quantum resources.
  arXiv  Detail & Related papers  (2022-12-26T11:14:39Z)
• Entanglement distribution with minimal memory requirements using time-bin photonic qudits [0.0]
  We propose a novel protocol based on $2m$-dimensional time-bin photonic qudits. By adopting the qudit protocol, the required qubit memory time is independent of the transmission loss between the nodes. Our protocol can significantly boost the performance of near-term quantum networks.
  arXiv  Detail & Related papers  (2022-10-29T09:23:04Z)
• All-photonic one-way quantum repeaters [15.3862808585761]
  We propose a general framework for all-photonic one-way quantum repeaters based on the measurement-based error correction. We present a novel decoding scheme, where the error correction process is carried out at the destination based on the accumulated data from the measurements made across the network.
  arXiv  Detail & Related papers  (2022-10-18T18:07:19Z)
• Amplification of cascaded downconversion by reusing photons with a switchable cavity [62.997667081978825]
  We propose a scheme to amplify triplet production rates by using a fast switch and a delay loop. Our proof-of-concept device increases the rate of detected photon triplets as predicted.
  arXiv  Detail & Related papers  (2022-09-23T15:53:44Z)
• Experimental Multi-state Quantum Discrimination in the Frequency Domain with Quantum Dot Light [40.96261204117952]
  In this work, we present the experimental realization of a protocol employing a time-multiplexing strategy to optimally discriminate among eight non-orthogonal states. The experiment was built on a custom-designed bulk optics analyser setup and single photons generated by a nearly deterministic solid-state source. Our work paves the way for more complex applications and delivers a novel approach towards high-dimensional quantum encoding and decoding operations.
  arXiv  Detail & Related papers  (2022-09-17T12:59:09Z)
• Suppressing Amplitude Damping in Trapped Ions: Discrete Weak Measurements for a Non-unitary Probabilistic Noise Filter [62.997667081978825]
  We introduce a low-overhead protocol to reverse this degradation. We present two trapped-ion schemes for the implementation of a non-unitary probabilistic filter against amplitude damping noise. This filter can be understood as a protocol for single-copy quasi-distillation.
  arXiv  Detail & Related papers  (2022-09-06T18:18:41Z)
• A scheme to create and verify scalable entanglement in optical lattice [17.18535438442883]
  We propose an efficient scheme to generate and characterize global entanglement in the optical lattice. With only two-layer quantum circuits, the generation utilizes two-qubit entangling gates based on the superexchange interaction in double wells. Our entanglement generation and verification protocols provide the foundation for the further quantum information processing in optical lattice.
  arXiv  Detail & Related papers  (2022-09-04T04:48:05Z)
• Protocol for generation of high-dimensional entanglement from an array of non-interacting photon emitters [0.0]
  We present a protocol for the near-deterministic generation of $N$-photon, $d$-dimensional photonic Greenberger-Horne-Zeilinger (GHZ) states. We analyse the impact on performance of common sources of error for quantum emitters, such as photon spectral distinguishability and temporal mismatch. Our protocol exhibits improved loss tolerance and key rates when increasing the dimensionality beyond binary encodings.
  arXiv  Detail & Related papers  (2022-01-04T15:09:35Z)
• Single-photon nonlocality in quantum networks [55.41644538483948]
  We show that the nonlocality of single-photon entangled states can nevertheless be revealed in a quantum network made only of beamsplitters and photodetectors. Our results show that single-photon entanglement may constitute a promising solution to generate genuine network-nonlocal correlations useful for Bell-based quantum information protocols.
  arXiv  Detail & Related papers  (2021-08-03T20:13:24Z)
• Conditional preparation of non-Gaussian quantum optical states by mesoscopic measurement [62.997667081978825]
  Non-Gaussian states of an optical field are important as a proposed resource in quantum information applications. We propose a novel approach involving displacement of the ancilla field into the regime where mesoscopic detectors can be used. We conclude that states with strong Wigner negativity can be prepared at high rates by this technique under experimentally attainable conditions.
  arXiv  Detail & Related papers  (2021-03-29T16:59:18Z)
• Experimental study of continuous variable quantum key distribution [0.22099217573031674]
  main technological factors limiting the communication rates of quantum cryptography systems by single photon are mainly related to the choice of the encoding method. We propose a new reconciliation method based on Turbo codes. Our method leads to a significant improvement of the protocol security and a large decrease of the QBER.
  arXiv  Detail & Related papers  (2020-02-16T21:50:31Z)

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.