Related papers: Gigahertz-clocked Generation of Highly Indistinguishable Photons at C-band Wavelengths

Gigahertz-clocked Generation of Highly Indistinguishable Photons at C-band Wavelengths

URL: http://arxiv.org/abs/2603.26651v2
Date: Wed, 01 Apr 2026 08:36:36 GMT
Title: Gigahertz-clocked Generation of Highly Indistinguishable Photons at C-band Wavelengths
Abstract summary: We report the generation of highly indistinguishable, single photons at a clock-rate of 2.5 GHz.<n>Our results show a substantial advancement towards interference-based quantum information protocols.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: High-performance single-photon sources at telecom C-band wavelentghs are key building blocks for applications in long-distance quantum communication. Here, we report the generation of highly indistinguishable, single photons at a clock-rate of 2.5 GHz. This is achieved by coherently driving the biexciton transition ($T_1^\mathrm{XX}=64(1)\,$ps) of a semiconductor quantum dot embedded in a microcavity with strong asymmetric Purcell enhancement. Employing pulsed two-photon resonant excitation, strong multiphoton suppression with $g^{(2)}(0) < 4\%$ and high two-photon-interference visibility of $V_\mathrm{raw}> 85\%$ is observed. The observed photon indistinguishability is close to the theoretical limit expected for the photonically engineered radiative cascade and matches values obtained at lower repetition rates. Our results show a substantial advancement towards interference-based quantum information protocols at unprecedented data rates in the telecom C-Band.

Related papers

Integrated photon-pair sources on periodically poled thin-film lithium tantalate [18.546273184587275]
SPDC-based photon-pair generation on thin-film lithium tantalate has not yet been demonstrated.<n>In periodically poled racetrack resonators, we map out a broad quantum frequency comb spanning the telecom C- and L-bands.<n>These results are competitive with the state of the art across $$ integrated platforms.
arXiv Detail & Related papers (2026-05-24T10:29:10Z)
Deterministic single-photon source with on-chip 5.6 GHz acoustic clock [59.38889796913807]
We demonstrate triggering of a quantum dot (QD) single photon emission using dynamic Purcell effect induced at a frequency of several GHz by acoustic strain.<n>InAs QDs are integrated in a hybrid photon-phonon patterned microcavity.
arXiv Detail & Related papers (2025-10-26T20:43:00Z)
Two-Photon Interference from an InAs Quantum Dot emitting in the Telecom C-Band [2.078504222049996]
Two-photon interference from an InAs/InAlGaAs quantum dot (QD) emitting in the telecom C-band with a raw two-photon interference visibility of $V_HOM=(71.9pm0.2)$ % is demonstrated.
arXiv Detail & Related papers (2025-01-27T11:27:09Z)
Experimental entanglement swapping through single-photon $χ^{(2)}$ nonlinearity [0.3747501273234419]
We demonstrate an entanglement swapping using sum-frequency generation between single photons in a $chi(2)$-nonlinear optical waveguide.<n>We show that a high signal-to-noise ratio(SNR), stable sum-frequency-generation-based entanglement heralder with an ultralow-dark-count superconducting single-photon detector can satisfy the unprecedented SNR requirement.<n>Our results confirm a lower bound 0.770(76) for the swapped state's fidelity, surpassing the classical limit of 0.5 successfully.
arXiv Detail & Related papers (2024-11-26T09:44:50Z)
Triggered telecom C-band single-photon source with high brightness, high indistinguishability and sub-GHz spectral linewidth [0.0]
Long-range, terrestrial quantum networks will require high brightness single-photon sources. Many applications demand triggered operation with high indistinguishability and narrow spectral linewidth. We present a coherently (incoherently) optically-pumped narrow-band (0.8 GHz) triggered single-photon source in the telecom C-band.
arXiv Detail & Related papers (2023-10-31T17:18:30Z)
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)
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)
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)
Quantum density matrix theory for a laser without adiabatic elimination of the population inversion: transition to lasing in the class-B limit [62.997667081978825]
No class-B quantum density-matrix model is available to date, capable of accurately describing coherence and photon correlations within a unified theory. Here we carry out a density-matrix theoretical approach for generic class-B lasers, and provide closed equations for the photonic and atomic reduced density matrix in the Fock basis of photons. This model enables the study of few-photon bifurcations and non-classical photon correlations in class-B laser devices, also leveraging quantum descriptions of coherently coupled nanolaser arrays.
arXiv Detail & Related papers (2022-05-26T16:33:51Z)
Time-correlated Photons from a In$_{0.5}$Ga$_{0.5}$P Photonic Crystal Cavity on a Silicon Chip [55.41644538483948]
Time-correlated photon pairs are generated by triply-resonant Four-Wave-Mixing in a In$_0.5$Ga$_0.5$P Photonic Crystal cavitiy. The generation rate reaches 5 MHz in cavities with Q-factor $approx 4times 104$, more than one order of magnitude larger than what is measured using ring resonators with similar Q factors fabricated on the same chip.
arXiv Detail & Related papers (2022-02-19T15:22:06Z)
Almost indistinguishable single photons via multiplexing cascaded biphotons with cavity modulation and phase compensation [0.0]
We study the frequency entanglement of a biphoton generated from alkali metal atomic ensembles. The purity of single photon reaches up to $0.999$ and the entanglement entropy $S$ of the biphoton reduces to $0.006$. An extremely low frequency entanglement implies an almost indistinguishable single photon source.
arXiv Detail & Related papers (2022-01-26T15:34:26Z)
Entanglement between a telecom photon and an on-demand multimode solid-state quantum memory [52.77024349608834]
We show the first demonstration of entanglement between a telecom photon and a collective spin excitation in a multimode solid-state quantum memory. We extend the entanglement storage in the quantum memory for up to 47.7$mu$s, which could allow for the distribution of entanglement between quantum nodes separated by distances of up to 10 km.
arXiv Detail & Related papers (2021-06-09T13:59:26Z)
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)

This list is automatically generated from the titles and abstracts of the papers in this site.