Indistinguishable MHz-narrow heralded photon pairs from a whispering gallery resonator

• URL: http://arxiv.org/abs/2412.15760v1
• Date: Fri, 20 Dec 2024 10:25:29 GMT
• Title: Indistinguishable MHz-narrow heralded photon pairs from a whispering gallery resonator
• Authors: Sheng-Hsuan Huang, Thomas Dirmeier, Golnoush Shafiee, Kaisa Laiho, Dmitry V. Strekalov, Andrea Aiello, Gerd Leuchs, Christoph Marquardt,
• Abstract summary: Hong-Ou-Mandel interference plays a vital role in many quantum optical applications. We demonstrate how two independent signal photons radiated into different spatial modes can be rendered conditionally indistinguishable.
• Score: 0.0
• License:
• Abstract: Hong-Ou-Mandel interference plays a vital role in many quantum optical applications where indistinguishability of two photons is important. Such photon pairs are commonly generated as the signal and idler in the frequency and polarization-degenerate spontaneous parametric down conversion~(SPDC). To scale this approach to a larger number of photons we demonstrate how two independent signal photons radiated into different spatial modes can be rendered conditionally indistinguishable by a heralding measurement performed on their respective idlers. We use the SPDC in a whispering gallery resonator, which is already proven to be versatile sources of quantum states. Its extreme conversion efficiency allowed us to perform our measurements with only \qty{50}{nW} of in-coupled pump power in each propagation direction. The Hong-Ou-Mandel interference of two counter-propagating signal photons manifested itself in the four-fold coincidence rate, where the two idler photons detection heralds a pair of signal photons with a desired temporal overlap. We achieved the Hong-Ou-Mandel dip contrast of \(74\pm 5\%\). Importantly, the optical bandwidth of all involved photons is of the order of a MHz and is continuously tunable. This, on the one hand, makes it possible to achieve the necessary temporal measurements resolution with standard electronics, and on the other hand, creates a quantum states source compatible with other candidates for qubit implementation, such as optical transitions in solid-state or vaporous systems. We also discuss the possibility of generating photon pairs with similar temporal modes from two different whispering gallery resonators.

Related papers

• Photonic quantum information processing using the frequency continuous-variable of single photons [0.0]
  We show that the richness of two-photon interferometry extends to the realm of time-frequency interferometry. We introduce an interferometric strategy using a frequency engineered two-photon state allowing to reach Heisenberg scaling for phase estimation.
  arXiv  Detail & Related papers  (2024-02-10T14:31:22Z)
• 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)
• Controlling Frequency-Domain Hong-Ou-Mandel Interference via Electromagnetically Induced Transparency [5.467400475482669]
  Hong-Ou-Mandel (HOM) interference is a compelling quantum phenomenon that demonstrates the nonclassical nature of single photons. In this study, we investigate an electromagnetically induced transparency-based double-$Lambda$ four-wave mixing system.
  arXiv  Detail & Related papers  (2023-02-14T08:22:09Z)
• 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)
• 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)
• Optical Entanglement of Distinguishable Quantum Emitters [0.0]
  We propose and demonstrate an efficient method for entangling emitters with optical transitions separated by many linewidths. In our approach, electro-optic modulators enable a single photon to herald a parity measurement on a pair of spin qubits. Working with distinguishable emitters allows for individual qubit addressing and readout, enabling parallel control and entanglement of both co-located and spatially separated emitters.
  arXiv  Detail & Related papers  (2021-08-24T19:37:08Z)
• Two-photon resonance fluorescence of two interacting non-identical quantum emitters [77.34726150561087]
  We study a system of two interacting, non-indentical quantum emitters driven by a coherent field. We show that the features imprinted by the two-photon dynamics into the spectrum of resonance fluorescence are particularly sensitive to changes in the distance between emitters. This can be exploited for applications such as superresolution imaging of point-like sources.
  arXiv  Detail & Related papers  (2021-06-04T16:13:01Z)
• Auto-heterodyne characterization of narrow-band photon pairs [68.8204255655161]
  We describe a technique to measure photon pair joint spectra by detecting the time-correlation beat note when non-degenerate photon pairs interfere at a beamsplitter. The technique is well suited to characterize pairs of photons, each of which can interact with a single atomic species.
  arXiv  Detail & Related papers  (2021-01-08T18:21:30Z)
• Tunable quantum interference using a topological source of indistinguishable photon pairs [0.0]
  We demonstrate the use of a two-dimensional array of ring resonators to generate indistinguishable photon pairs. We show that the linear dispersion of the edge states over a broad bandwidth allows us to tune the correlations. Our results pave the way for scalable and tunable sources of squeezed light.
  arXiv  Detail & Related papers  (2020-06-04T18:11:30Z)
• 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)
• Quantum-Clustered Two-Photon Walks [68.8204255655161]
  We demonstrate a previously unknown two-photon effect in a discrete-time quantum walk. Two identical bosons with no mutual interactions can remain clustered together. The two photons move in the same direction at each step due to a two-photon quantum interference phenomenon.
  arXiv  Detail & Related papers  (2020-03-12T17:02:35Z)

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.