Heralded qudit-based high-dimensional entanglement generation for hybrid photon-emitter system by waveguide-mediated scattering

• URL: http://arxiv.org/abs/2504.07386v2
• Date: Sun, 13 Apr 2025 04:30:06 GMT
• Title: Heralded qudit-based high-dimensional entanglement generation for hybrid photon-emitter system by waveguide-mediated scattering
• Abstract summary: Quantum entanglement systems based on qudits dilate high-dimensional (HD) state spaces and enhance resistance to loss in quantum information processing (QIP)<n>We propose a flexible scheme generating random 4D two-qudit maximal entanglement for hybrid photon-emitter system by entering different input ports.<n>The qudit-encoded hybrid HD entanglement offers advantages over economizing quantum resource without any auxiliary qudits.
• Score: 1.3156655642290815
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum entanglement systems based on qudits dilate high-dimensional (HD) state spaces and enhance resistance to loss in quantum information processing (QIP). To fully exploit this potential, effective schemes for generating HD entanglement are crucial. In this paper, we propose a flexible heralded scheme generating random 4D two-qudit maximal entanglement for hybrid photon-emitter system by entering different input ports. This approach can be further extended to prepare 4D n-qudit (n is greater than or equal 3) maximal entanglement utilizing the 4D single-qudit Z^m (m=1,2,3) gate for the first qudit and X^m gate for the other qudits (except the second qudit). For the hybrid system, the first 4D qudit is encoded on the hybrid polarization-path states of a flying photon, while the second and subsequent 4D qudits are represented by two stationary emitters coupled to respective 1D waveguide. The qudit-encoded hybrid HD entanglement offers advantages over economizing quantum resource without any auxiliary qudits, and obtaining robust fidelities of various HD entanglement by the error-detected mechanism of the emitter-waveguide systems. Moreover, the proposed protocol can be spread to generate dD n-qudit (d is greater than or equal 2^(p+1), n, p=2,3,...) entangled states, further broadening its applicability in HD QIP.

Related papers

• Spontaneous four-wave mixing in a thin layer with second-order nonlinearity [0.0]
  We show that in a thin layer, direct SFWM dominates, because the wavevector mismatch for SFWM is much smaller than for SHG or SPDC.<n>The existence of both second- and third-order nonlinear processes offers broader opportunities for quantum state engineering.
  arXiv  Detail & Related papers  (2026-01-30T16:25:05Z)
• Integrated polarization-entangled photon source for wavelength-multiplexed quantum networks [49.82426139329382]
  We present a simple yet high-performance on-chip polarization-entangled photon-pair source on thin-film lithium niobate (TFLN)<n>Our device employs dual quasi-phase matching (D-QPM) that sequentially supports type-0 and type-I spontaneous parametric down-conversion in a single nanophotonic waveguide.<n>We realize wavelength-multiplexed entanglement distribution in a four-user quantum network deployed over metropolitan fiber links up to 50 km.
  arXiv  Detail & Related papers  (2025-11-27T18:30:01Z)
• Directional quantum scattering transducer in cooperative Rydberg metasurfaces [0.0]
  We present a single-photon transduction scheme using 4-wave-mixing and quantum scattering in Rydberg arrays.<n>Our scheme combines the broadband acceptance of free-space 4-wave mixing with the efficiency, directionality and tunability of cooperative metasurfaces.<n>It offers a route towards quantum-coherent THz detection and processing for astronomical spectroscopy, quantum-networked sparse-aperture imaging and other quantum-sensing applications.
  arXiv  Detail & Related papers  (2025-10-31T17:27:14Z)
• Computing-heightened low-cost high-dimensional controlled-SUM gates [0.0]
  Qudit-based quantum gates offer several advantages over qubit-based counterparts. We present three realistic protocols for implementing a 4$times$4-dimensional (16D) two-qudit controlled-SUM gate.
  arXiv  Detail & Related papers  (2025-04-24T09:13:26Z)
• Generation of photon pairs through spontaneous four-wave mixing in subwavelength nonlinear films [67.410870290301]
  We investigate photon pair generation through spontaneous four-wave mixing (SFWM) in subwavelength films of amorphous silicon nitride (SiN) with varying nitrogen content.<n>By observing two-photon interference between SFWM from the SiN films and the fused silica substrate, we find the third-order susceptibilities of films with different nitrogen content.
  arXiv  Detail & Related papers  (2025-02-03T12:30:06Z)
• A Computation-Enhanced High-Dimensional Quantum Gate for Silicon-Vacancy Spins [1.342834401139078]
  Qudit-based quantum gates in high-dimensional Hilbert space can provide a viable route towards effectively accelerating the speed of quantum computing. We propose a 2-qudit $4times4$-dimensional controlled-not (CNOT) gate for four silicon-vacancy spins.
  arXiv  Detail & Related papers  (2024-09-18T07:24:29Z)
• High-dimensional maximally entangled photon pairs in parametric down-conversion [0.0]
  Laguerre-Gaussian modes, which carry orbital angular momentum (OAM), are commonly exploited to engineer high-dimensional entangled quantum states. For Hilbert spaces with d>2, maximally entangled states (MESs) help to improve the capacity and security of quantum communication protocols. We formalize how the spatial distribution of the pump beam and the nonlinear profile of the crystal can be simultaneously utilized to generate MES.
  arXiv  Detail & Related papers  (2024-07-12T14:13:04Z)
• High-purity single-photon generation based on cavity QED [0.562479170374811]
  We propose a scheme for generating a high-purity single photon on the basis of cavity quantum electrodynamics (QED)<n>This structure allows the suppression of the re-excitation process due to the atomic decay.<n>Our scheme can contribute to developing distributed quantum computation or quantum communication with high accuracy.
  arXiv  Detail & Related papers  (2024-02-29T19:02:38Z)
• Hyper-entanglement between pulse modes and frequency bins [101.18253437732933]
  Hyper-entanglement between two or more photonic degrees of freedom (DOF) can enhance and enable new quantum protocols. We demonstrate the generation of photon pairs hyper-entangled between pulse modes and frequency bins.
  arXiv  Detail & Related papers  (2023-04-24T15:43:08Z)
• Supersymmetric reshaping and higher-dimensional rearrangement of photonic lattices [68.8204255655161]
  We build two-dimensional (2D) systems with spectra identical to that of one-dimensional (1D) Jx lattices. While exhibiting different dynamics, these 2D systems retain the key imaging and state transfer properties of the 1D Jx lattice. Our method extends to other systems with separable spectra, facilitates experimental fabrication, and may increase robustness to fabrication imperfections in large-scale photonic circuits.
  arXiv  Detail & Related papers  (2022-09-26T16:56:41Z)
• Ultrabright and narrowband intra-fiber biphoton source at ultralow pump power [51.961447341691]
  Nonclassical photon sources of high brightness are key components of quantum communication technologies. We here demonstrate the generation of narrowband, nonclassical photon pairs by employing spontaneous four-wave mixing in an optically-dense ensemble of cold atoms within a hollow-core fiber.
  arXiv  Detail & Related papers  (2022-08-10T09:04:15Z)
• Topological multi-mode waveguide QED [49.1574468325115]
  We show how to take advantage of topologically protected propagating modes by interfacing them with quantum emitters. Such capabilities pave the way for generating quantum gates among topologically protected photons as well as generating more complex entangled states of light in topological channels.
  arXiv  Detail & Related papers  (2022-07-05T14:48:50Z)
• In-plane resonant excitation of quantum dots in a dual-mode photonic-crystal waveguide with high $\beta$-factor [0.4588028371034407]
  A high-quality quantum dot (QD) single-photon source is a key resource for quantum information processing. We propose a novel dual-mode photonic-crystal waveguide that realizes direct in-plane resonant excitation of the embedded QDs. The device has a compact footprint of $sim 50$ $mu$m$2$ and would enable stable and scalable excitation of multiple emitters for multi-photon quantum applications.
  arXiv  Detail & Related papers  (2021-12-01T13:46:13Z)
• Hyperentanglement in structured quantum light [50.591267188664666]
  Entanglement in high-dimensional quantum systems, where one or more degrees of freedom of light are involved, offers increased information capacities and enables new quantum protocols. Here, we demonstrate a functional source of high-dimensional, noise-resilient hyperentangled states encoded in time-frequency and vector-vortex structured modes. We generate highly entangled photon pairs at telecom wavelength that we characterise via two-photon interference and quantum state tomography, achieving near-unity visibilities and fidelities.
  arXiv  Detail & Related papers  (2020-06-02T18:00:04Z)
• Near-ideal spontaneous photon sources in silicon quantum photonics [55.41644538483948]
  Integrated photonics is a robust platform for quantum information processing. Sources of single photons that are highly indistinguishable and pure, that are either near-deterministic or heralded with high efficiency, have been elusive. Here, we demonstrate on-chip photon sources that simultaneously meet each of these requirements.
  arXiv  Detail & Related papers  (2020-05-19T16:46:44Z)
• On-demand indistinguishable single photons from an efficient and pure source based on a Rydberg ensemble [48.879585399382435]
  Single photons coupled to atomic systems have shown to be a promising platform for developing quantum technologies. Yet a bright on-demand, highly pure and highly indistinguishable single-photon source compatible with atomic platforms is lacking. In this work, we demonstrate such a source based on a strongly interacting Rydberg system.
  arXiv  Detail & Related papers  (2020-03-04T17:16:56Z)

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.