Heralded one-, two- and three-photon states from waveguided parametric down-conversion

• URL: http://arxiv.org/abs/2609.03542v1
• Date: Thu, 03 Sep 2026 08:42:39 GMT
• Title: Heralded one-, two- and three-photon states from waveguided parametric down-conversion
• Abstract summary: manifold coincidences and singles counting provides a resource-saving quantum-optics analysis tool.<n>We show that the single-click probability is a versatile tool for extracting the state's mean photon number.<n> normalized photon correlations provide an expedient method for examining the higher-order non-classicality of light.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The manifold coincidences and singles counting provides a resource-saving quantum-optics analysis tool, since it is appropriate even in the presence of heavy experimental imperfections. Here, we prepare cross-polarized twin beams in the telecommunication wavelength range via parametric down-conversion in a periodically-poled KTiOPO$_4$ waveguide and herald photon-number states up to three photons. First, we show that the single-click probability is a versatile tool not only for extracting the state's mean photon number but also for sampling values of the moment generating function being the core behind any quantum optical state. Second, we measure values of the normalized factorial moments of photon number, $g^{(m)}_{\text{h}}$, up to the order $m = n+1$ for the heralded $n$-photon state. These normalized photon correlations provide an expedient method for examining the higher-order non-classicality of light by violating the condition $g^{(m+1)}_{\text{h}} \ge g^{(m)}_{\text{h}} \ge 1$.

Related papers

• Mapping photon-number regimes in single-emitter lasers [41.99844472131922]
  We present a numerical analysis of an open quantum system consisting of an incoherently pumped three-level emitter strongly coupled to a single cavity mode.<n>We find that laser behavior can emerge from minimal photon populations.<n>Our findings can be applied to define the operational limits of single-emitter light sources.
  arXiv  Detail & Related papers  (2026-06-30T07:10:49Z)
• 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)
• Counter-propagating spontaneous parametric down-conversion source in lithium niobate on insulator [40.13294159814764]
  We show the first integrated counter-propagating photon-pair source on lithium niobate on insulator, where signal and idler photons are generated in opposite directions.<n>The results establish a new route toward integrated, high-purity, and tunable photon sources.
  arXiv  Detail & Related papers  (2025-06-26T15:44:16Z)
• Multiband dispersion and warped vortices of strongly-interacting photons [36.939655407596426]
  We study quantum correlations between interacting photons realized through co-propagating Rydberg polaritons.<n>For three photons, the dispersion breaks the symmetry between a photon pair propagating ahead versus behind a single photon.
  arXiv  Detail & Related papers  (2025-02-17T08:35:10Z)
• The quantum beam splitter with many partially indistinguishable photons: multiphotonic interference and asymptotic classical correspondence [44.99833362998488]
  We present the analysis of the quantum two-port interferometer in the $n rightarrow infty$ limit of $n$ partially indistinguishable photons. Our main result is that the output distribution is dominated by the $O(sqrtn)$ channels around a certain $j*$ that depends on the degree of indistinguishability. The form is essentially the doubly-humped semi-classical envelope of the distribution that would arise from $2 j*$ indistinguishable photons, and which reproduces the corresponding classical intensity distribution.
  arXiv  Detail & Related papers  (2023-12-28T01:48:26Z)
• Photonic source of heralded GHZ states [0.0]
  We build a high-rate six-photon source from a solid-state quantum emitter and a stable polarisation-based interferometer.<n>Our results initiate a path for scalable entangling operations using heralded linear-optics implementations.
  arXiv  Detail & Related papers  (2023-08-10T17:17:28Z)
• High-throughput quantum photonic devices emitting indistinguishable photons in the telecom C-band [28.279056210896716]
  Single indistinguishable photons at telecom C-band wavelengths are essential for quantum networks and the future quantum internet. We demonstrate the high- throughput fabrication of quantum-photonic integrated devices operating at C-band wavelengths based on epitaxial semiconductor quantum dots. Further improvements in yield and coherence properties will pave the way for implementing single-photon non-linear devices and advanced quantum networks at telecom wavelengths.
  arXiv  Detail & Related papers  (2023-04-05T15:39:22Z)
• A unipolar quantum dot diode structure for advanced quantum light sources [0.0]
  diode structure embedding semiconductor quantum dots. Blinking-free single-photon emission and high two-photon indistinguishability is observed.
  arXiv  Detail & Related papers  (2023-01-09T17:47:10Z)
• 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)
• 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)
• Improved heralded single-photon source with a photon-number-resolving superconducting nanowire detector [0.0]
  We herald a single photon at telecommunication wavelength using a superconducting nanowire detector. We develop an analytical model using a phase-space formalism that encompasses all multiphoton effects and relevant imperfections. Our experiment, built using fiber-coupled and off-the-shelf components, delineates a path to engineering ideal sources of single photons.
  arXiv  Detail & Related papers  (2021-12-21T18:48:34Z)
• Entangling a Hole Spin with a Time-Bin Photon: A Waveguide Approach for Quantum Dot Sources of Multi-Photon Entanglement [2.248469235112198]
  Multi-photon entanglement is attractive for quantum information processing but is challenging to realize experimentally. In this paper, we demonstrate a route towards a scaleable source of time-bin encoded Greenberger-Horne-Zeilinger and linear cluster states from a solid-state quantum dot embedded in a nanophotonic crystal waveguide.
  arXiv  Detail & Related papers  (2021-11-24T14:43:57Z)
• 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.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.