Heralding multiple photonic pulsed Bell-pairs via frequency-resolved entanglement swapping

Abstract

Entanglement is a unique property of quantum systems and an essential resource for many quantum technologies. The ability to transfer or swap entanglement between systems is an important protocol in quantum information science. Entanglement between photons forms the basis of distributed quantum networks and the demonstration of photonic entanglement swapping is essential for their realization. Here an experiment demonstrating entanglement swapping from two independent multimode time-frequency entangled sources is presented, resulting in multiple heralded temporal-mode Bell states. Entanglement in the heralded states is verified by measuring conditional anti-correlated joint spectra as well as quantum beating in two-photon interference. Our proof-of-concept experiment is able to distinguish up to five orthogonal Bell pairs within the same setup, limited in principle only by the entanglement of the sources.

References in corpus (4)

• Entangling Independent Photons by Time Measurement
• Direct generation of tailored pulse-mode entanglement
• Spectrally-resolved four-photon interference of time-frequency entangled photons
• A positive operator-valued measure for two-photon detection via sum-frequency generation

Cited by in corpus (9)

• Zero-Added-Loss Entangled Photon Multiplexing for Ground- and Space-Based Quantum Networks
• Complete frequency-bin Bell basis synthesizer
• On-chip frequency-bin quantum photonics
• Hyper-entanglement between pulse modes and frequency bins
• Spectrally-resolved four-photon interference of time-frequency entangled photons
• From broadband biphotons to frequency combs via spectral compression with time-varying cavities
• Entanglement swapping in high dimensions with only linear optics
• Zero-added-loss entanglement multiplexing using time-bin spectral shearing
• Harnessing Hybrid Frequency-Entangled Qudits through Quantum Interference