Quantum-preserving telecom conversion of atomic biphotons

• URL: http://arxiv.org/abs/2603.09824v1
• Date: Tue, 10 Mar 2026 15:46:45 GMT
• Title: Quantum-preserving telecom conversion of atomic biphotons
• Abstract summary: We experimentally demonstrate telecom frequency conversion of atomic biphotons using a diamond-type atomic ensemble.<n> efficient conversion is achieved while preserving the temporal waveform and nonclassical antibunching behavior.<n>Results establish a practical interface between atomic photon sources and telecom fiber networks, enabling quantum interference and distributed quantum communication.
• Score: 1.2310734021371517
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We experimentally demonstrate telecom frequency conversion of atomic biphotons using a diamond-type atomic ensemble. By spectrally engineering heralded photons and optimizing the atomic converter, efficient conversion is achieved while preserving the temporal waveform and nonclassical antibunching behavior. The converted photons retain strong quantum correlations and well-defined wavepackets, demonstrating preservation of dynamical quantum properties beyond photon-statistics-based benchmarks. The measured performance agrees with a microscopic model that captures the spectral acceptance and parameter dependence of the converter. These results establish a practical interface between atomic photon sources and telecom fiber networks, enabling quantum interference and distributed quantum communication.

Related papers

• Realization of waveguide many-body quantum optics [7.0362774174132126]
  Many-body quantum optics opens the arena of many-body entangled states.<n>We study the scaling of nonlinear photonic transport induced by emitter-photon scattering.<n>These advancements enable new photonic quantum simulators, the creation of many-body entangled states, and the exploration of novel quantum phase transitions.
  arXiv  Detail & Related papers  (2026-05-18T15:11:46Z)
• Quantum-memory-assisted on-demand microwave-optical transduction [14.520954141766351]
  We propose and experimentally demonstrate a memoryenhanced quantum microwave-optical transduction using a Rydberg ensemble.<n>We store microwave photons in a highly excited collective state and subsequently convert them into optical photons during the retrieval process.<n>Taking advantage of the optical depth with order of millions for microwave photons in Rydberg ensemble, combined with a minimal storage dephasing rate at the single-photon level, the transducer achieves an areanormalized storage efficiency greater than 90%.
  arXiv  Detail & Related papers  (2025-09-23T09:19:06Z)
• Coherent Control of Quantum-Dot Spins with Cyclic Optical Transitions [0.1213707023442356]
  Solid-state spins are promising as interfaces from stationary qubits to single photons for quantum communication technologies.<n>We show that it is compatible with the operation of a nuclear quantum memory.<n>Our approach enables repeated emission of indistinguishable photons together with qubit control, as required for single-shot readout, photonic cluster-state generation, and quantum repeater technologies.
  arXiv  Detail & Related papers  (2025-09-17T21:37:50Z)
• Engineering giant transmon molecules as mediators of conditional two-photon gates [44.99833362998488]
  We show how to use an array of non-locally coupled transmon "molecules" to engineer a passive photonic controlled gate for waveguide photons.<n>Our work opens the use of giant atoms as key elements of microwave photonic quantum computing devices.
  arXiv  Detail & Related papers  (2025-07-07T18:03:59Z)
• Generation of frequency entanglement with an effective quantum dot-waveguide two-photon quadratic interaction [0.0]
  We exploit the atomic-like four-level structure of a quantum dot coupled to a waveguide to model a shaping frequency entangling gate (ShaFrEnGa) for single photons.<n>Our approach is based on the identification of input frequencies and an atomic level structure for which frequency-dependent one-photon transitions are adiabatically eliminated.<n>The frequency entanglement performance of the gate is analyzed using a Schmidt decomposition for continuous variables, revealing a trade-off between entanglement generation efficiency and entanglement quality.
  arXiv  Detail & Related papers  (2025-05-15T09:47:10Z)
• Quantum memristor with vacuum--one-photon qubits [0.0]
  An optical quantum memristor can be realized with a vacuum--one-photon qubit entering a tunable beam splitter.<n>We show that the coherence of the input state is preserved by the quantum memristor.
  arXiv  Detail & Related papers  (2025-03-04T10:22:03Z)
• Cryogenic Feedforward of a Photonic Quantum State [0.6819010383838326]
  Modulation conditioned on measurements on entangled photonic quantum states is a cornerstone technology of optical quantum information processing. We demonstrate low-latency feedforward using a quasi-photon-number-resolved measurement on a quantum light source. This represents an important benchmark for the fastest quantum photonic feedforward experiments.
  arXiv  Detail & Related papers  (2024-10-11T15:29:15Z)
• Quantum-limited millimeter wave to optical transduction [50.663540427505616]
  Long distance transmission of quantum information is a central ingredient of distributed quantum information processors. Current approaches to transduction employ solid state links between electrical and optical domains. We demonstrate quantum-limited transduction of millimeter-wave (mmwave) photons into optical photons using cold $85$Rb atoms as the transducer.
  arXiv  Detail & Related papers  (2022-07-20T18:04:26Z)
• Tunable photon-mediated interactions between spin-1 systems [68.8204255655161]
  We show how to harness multi-level emitters with several optical transitions to engineer photon-mediated interactions between effective spin-1 systems. Our results expand the quantum simulation toolbox available in cavity QED and quantum nanophotonic setups.
  arXiv  Detail & Related papers  (2022-06-03T14:52:34Z)
• Complete conversion between one and two photons in nonlinear waveguides with tailored dispersion [62.997667081978825]
  We show theoretically how to control coherent conversion between a narrow-band pump photon and broadband photon pairs in nonlinear optical waveguides. We reveal that complete deterministic conversion as well as pump-photon revival can be achieved at a finite propagation distance.
  arXiv  Detail & Related papers  (2021-10-06T23:49:44Z)
• Waveguide quantum electrodynamics: collective radiance and photon-photon correlations [151.77380156599398]
  Quantum electrodynamics deals with the interaction of photons propagating in a waveguide with localized quantum emitters. We focus on guided photons and ordered arrays, leading to super- and sub-radiant states, bound photon states and quantum correlations with promising quantum information applications.
  arXiv  Detail & Related papers  (2021-03-11T17:49:52Z)
• 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)

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.