Ultrabright Polarization-Entangled Photon Pair Source for Frequency-Multiplexed Quantum Communication in Free-Space

• URL: http://arxiv.org/abs/2205.10214v1
• Date: Fri, 20 May 2022 14:39:32 GMT
• Title: Ultrabright Polarization-Entangled Photon Pair Source for Frequency-Multiplexed Quantum Communication in Free-Space
• Authors: Emma Brambila (1,2), Rodrigo G\'omez (1,2), Riza Fazili (1,2), Markus Gr\"afe (1,2), Fabian Steinlechner (1,2) ((1) Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Jena, Germany, (2) Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena, Germany)
• Abstract summary: The distribution of entanglement via satellite links will drastically extend the reach of quantum networks. We report on an ultrabright entangled photon source that is optimized for long-distance free-space transmission.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The distribution of entanglement via satellite links will drastically extend the reach of quantum networks. Highly efficient entangled photon sources are an essential requirement towards overcoming high channel loss and achieving practical transmission rates in long-distance satellite downlinks. Here we report on an ultrabright entangled photon source that is optimized for long-distance free-space transmission. It operates in a wavelength range that is efficiently detected with space-ready single photon avalanche diodes (Si-SPADs), and readily provides pair emission rates that exceed the detector bandwidth (i.e., the temporal resolution). To overcome this limitation, we demultiplex the photon flux into wavelength channels that can be handled by current single photon detector technology. This is achieved efficiently by using the spectral correlations due to hyper-entanglement in polarization and frequency as an auxiliary resource. Combined with recent demonstrations of space-proof source prototypes, these results pave the way to a broadband long-distance entanglement distribution network based on satellites.

Related papers

• Ultra-broadband non-degenerate guided-wave bi-photon source in the near and mid-infrared [0.0]
  We present an integrated PDC source based on a Ti:LiNbO$_3$ waveguide that generates broadband bi-photons with central wavelengths at $860,mathrmnm$ and $2800,mathrmnm$. Their spectral bandwidth exceeds $25,mathrmTHz$ and is achieved by simultaneous matching of the group velocities and cancellation of group velocity dispersion for the signal and idler field. We provide an intuitive understanding of the process by studying our source's behaviour at different temperatures and pump wavelengths, which agrees well with simulations.
  arXiv  Detail & Related papers  (2024-08-22T08:23:35Z)
• Polarization Entanglement with highly non-degenerate photon pairs enhanced by effective walk-off compensation method [0.0]
  We demonstrate polarization entanglement in non-degenerate photon pairs using bulk periodically poled Lithium Niobate (PPLN) crystals. We introduce an effective compensation method using birefringent crystal wedges to eliminate spatial and temporal walkoffs simultaneously.
  arXiv  Detail & Related papers  (2024-05-10T18:12:51Z)
• 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)
• On-chip quantum information processing with distinguishable photons [55.41644538483948]
  Multi-photon interference is at the heart of photonic quantum technologies. Here, we experimentally demonstrate that detection can be implemented with a temporal resolution sufficient to interfere photons detuned on the scales necessary for cavity-based integrated photon sources. We show how time-resolved detection of non-ideal photons can be used to improve the fidelity of an entangling operation and to mitigate the reduction of computational complexity in boson sampling experiments.
  arXiv  Detail & Related papers  (2022-10-14T18:16:49Z)
• High quality entanglement distribution through telecommunication fiber using near-infrared non-degenerate photon pairs [73.4643018649031]
  In urban environments, the quantum channel in the form of telecommunication optical fiber (confirming to ITU G.652D standards) are available. We investigate the possibility that for campus-type communications, entangled photons prepared in the Near-Infrared Range (NIR) can be transmitted successfully.
  arXiv  Detail & Related papers  (2022-09-09T03:23:11Z)
• 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)
• Distributing Polarization Entangled Photon Pairs with High Rate over Long Distance through Standard Telecommunication Fiber [0.0]
  Entanglement distribution over long distances is essential for many quantum communication schemes. We present entanglement distribution over 50km of standard telecommunication fiber with pair rate more than 10,000 s$-1$ using a bright non-degenerate photon pair source.
  arXiv  Detail & Related papers  (2022-04-22T08:40:19Z)
• Telecom-band Hyperentangled Photon Pairs from a Fiber-based Source [49.06242674127539]
  We experimentally demonstrate the generation of telecom-band biphotons hyperentangled in both the polarization and frequency DoFs. The states produced by our hyperentanglement source can enable protocols such as dense coding and high-dimensional quantum key distribution.
  arXiv  Detail & Related papers  (2021-12-06T21:37:43Z)
• Submegahertz spectral width photon pair source based on fused silica microspheres [0.0]
  High efficiency, sub-MHz bandwidth photon pair generators will enable the field of quantum technology to transition from laboratory demonstrations to transformational applications involving information transfer from photons to atoms. We use an ultra-high quality factor (Q) fused silica microsphere resonant cavity to form a photon pair generator. We demonstrate the extraction of the spectral profile of a single peak in the single-photon frequency comb from a measurement of the signal-idler time of emission distribution.
  arXiv  Detail & Related papers  (2021-10-25T23:56:19Z)
• 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)

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.