Implementation of quantum synchronization over a 20-km fiber distance based on frequency-correlated photon pairs and HOM interference

• URL: http://arxiv.org/abs/2106.13986v1
• Date: Sat, 26 Jun 2021 09:45:28 GMT
• Title: Implementation of quantum synchronization over a 20-km fiber distance based on frequency-correlated photon pairs and HOM interference
• Authors: Yuting Liu, Runai Quan, Xiao Xiang, Huibo Hong, Tao Liu, Ruifang Dong, and Shougang Zhang
• Abstract summary: The quantum synchronization based on frequency-correlated photon pairs and HOM interference has shown femtosecond-level precision. Due to the difficulty of achieving stable HOM interference fringe after long-distance fiber transmission, this quantum synchronization is hampered from long-haul field application. We successfully achieved the stable observation of the two-photon interference of the lab-developed broadband frequency-correlated photon pairs after 20 km-long fiber transmission.
• Score: 3.9137835408510298
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The quantum synchronization based on frequency-correlated photon pairs and HOM interference has shown femtosecond-level precision and great application prospect in numerous fields depending on high-precision timefrequency signals. Due to the difficulty of achieving stable HOM interference fringe after long-distance fiber transmission, this quantum synchronization is hampered from long-haul field application. Utilizing segmented fibers instead of a single long-length fiber, we successfully achieved the stable observation of the two-photon interference of the lab-developed broadband frequency-correlated photon pairs after 20 km-long fiber transmission, without employing auxiliary phase stabilization method. Referenced to this interference fringe, the balance of the two fiber arms is successfully achieved with a long-term stability of 20 fs. The HOM-interference-based synchronization over a 20-km fiber link is thus demonstrated and a minimum stability of 74 fs has been reached at 48,000 s. This result not only provides a simple way to stabilize the fiber-optic two-photon interferometer for long-distance quantum communication systems, but also makes a great stride forward in extending the quantum-interference-based synchronization scheme to the long-haul field applications.

Related papers

• Multiphoton interference in a single-spatial-mode quantum walk [0.0]
  Multiphoton interference is crucial to many photonic quantum technologies. Here, we implement a quantum walk in a highly stable, low-loss, multiport interferometer with up to 24 ultrafast time bins. Our results demonstrate that ultrafast time bins are a promising platform to observe large-scale multiphoton interference.
  arXiv  Detail & Related papers  (2024-09-17T18:14:54Z)
• Quantum two-way time transfer over a 103 km urban fiber [3.752176524417018]
  We implement the two-way quantum time transfer over a 103 km urban fiber link. Time transfer stability of 3.67 ps at 10 s and 0.28 ps at 40000 s has been achieved.
  arXiv  Detail & Related papers  (2023-05-03T05:06:43Z)
• 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)
• Coherent light scattering from a telecom C-band quantum dot [0.0]
  Coherent quantum light generation at telecom wavelengths is fundamental for fibre-based network implementations. We show that even the inelastically scattered photons have coherence times within the error bars of the Fourier limit.
  arXiv  Detail & Related papers  (2022-05-16T21:32:12Z)
• Continuous entanglement distribution over a transnational 248 km fibre link [58.720142291102135]
  Entanglement is the basis of many quantum applications. We present a continuously working international link between Austria and Slovakia. We measure stable pair rates of 9 s$-1$ over an exemplary operation time of 110 hours.
  arXiv  Detail & Related papers  (2022-03-23T13:55:27Z)
• Fine-grained All-fiber Nonlocal Dispersion Compensation in the Telecommunications O-Band [68.8204255655161]
  Photon timing correlations were preserved down to 51ps$pm$21ps over two multi-segmented 10km spans of deployed metropolitan fiber. This degree of compensation can be achieved with relatively large fiber (1km), compatible with real-world deployment.
  arXiv  Detail & Related papers  (2022-01-26T14:29:01Z)
• 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)
• Demonstration of 50 km Fiber-optic two-way quantum time transfer at femtosecond-scale precision [3.6570312017753084]
  Two-way quantum time transfer has been proposed and experimentally demonstrated for its potential enhancements in precision and better guarantee of security. Experiment on two-way quantum time transfer has been carried out over a 50 km long fiber link.
  arXiv  Detail & Related papers  (2021-10-31T02:27:44Z)
• Spectral multiplexing of telecom emitters with stable transition frequency [68.8204255655161]
  coherent emitters can be entangled over large distances using photonic channels. We observe around 100 individual erbium emitters using a Fabry-Perot resonator with an embedded 19 micrometer thin crystalline membrane. Our results constitute an important step towards frequency-multiplexed quantum-network nodes operating directly at a telecommunication wavelength.
  arXiv  Detail & Related papers  (2021-10-18T15:39:07Z)
• Implementation of field two-way quantum synchronization of distant clocks across a 7 km deployed fiber link [3.6570312017753084]
  A field test of two-way quantum synchronization between a H-maser and a Rb clock linked by a 7 km-long deployed fiber was implemented. The stability was improved by more than one-magnitude to 1.9 ps, even though the number of acquired photon pairs was only 1440 in 30 s.
  arXiv  Detail & Related papers  (2021-09-02T08:48:51Z)
• Characterization and stability measurement of deployed multicore fibers for quantum applications [50.591267188664666]
  We characterize for the first time, in terms of phase stability, multiple strands of a 4-core multicore fiber installed underground in the city of L'Aquila. We investigate the possibility of using such an infrastructure to implement quantum-enhanced schemes, such as high-dimensional quantum key distribution, quantum-based environmental sensors.
  arXiv  Detail & Related papers  (2021-03-11T18:24:59Z)

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.