Entanglement swapping for generation of heralded time-frequency-entangled photon pairs

Dashiell L. P. Vitullo; M. G. Raymer; B. J. Smith; Michal Karpinski; L. Mejling; Karsten Rottwitt

doi:10.1103/PhysRevA.98.023836

Entanglement swapping for generation of heralded time-frequency-entangled photon pairs

Dashiell L. P. Vitullo, M. G. Raymer, B. J. Smith^*, Michal Karpinski, L. Mejling, Karsten Rottwitt

^*Corresponding author for this work

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Abstract

Photonic time-frequency entanglement is a promising resource for quantum information processing technologies. We investigate swapping of continuous-variable entanglement in the time-frequency degree of freedom using three-wave mixing in the low-gain regime with the aim of producing heralded biphoton states with high purity and low multipair probability. Heralding is achieved by combining one photon from each of two biphoton sources via sum-frequency generation to create a herald photon. We present a realistic model with pulsed pumps, investigate the effects of resolving the frequency of the herald photon, and find that frequency-resolving measurement of the herald photon is necessary to produce high-purity biphotons. We also find a trade-off between the rate of successful entanglement swapping and both the purity and quantified entanglement resource (negativity) of the heralded biphoton state.

Original language	English
Article number	023836
Journal	Physical Review A (Atomic, Molecular and Optical Physics)
Volume	98
Issue number	2
Number of pages	15
ISSN	2469-9926
DOIs	https://doi.org/10.1103/PhysRevA.98.023836
Publication status	Published - 2018

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title = "Entanglement swapping for generation of heralded time-frequency-entangled photon pairs",

abstract = "Photonic time-frequency entanglement is a promising resource for quantum information processing technologies. We investigate swapping of continuous-variable entanglement in the time-frequency degree of freedom using three-wave mixing in the low-gain regime with the aim of producing heralded biphoton states with high purity and low multipair probability. Heralding is achieved by combining one photon from each of two biphoton sources via sum-frequency generation to create a herald photon. We present a realistic model with pulsed pumps, investigate the effects of resolving the frequency of the herald photon, and find that frequency-resolving measurement of the herald photon is necessary to produce high-purity biphotons. We also find a trade-off between the rate of successful entanglement swapping and both the purity and quantified entanglement resource (negativity) of the heralded biphoton state.",

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AU - Vitullo, Dashiell L. P.

AU - Raymer, M. G.

AU - Smith, B. J.

AU - Karpinski, Michal

AU - Mejling, L.

AU - Rottwitt, Karsten

PY - 2018

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N2 - Photonic time-frequency entanglement is a promising resource for quantum information processing technologies. We investigate swapping of continuous-variable entanglement in the time-frequency degree of freedom using three-wave mixing in the low-gain regime with the aim of producing heralded biphoton states with high purity and low multipair probability. Heralding is achieved by combining one photon from each of two biphoton sources via sum-frequency generation to create a herald photon. We present a realistic model with pulsed pumps, investigate the effects of resolving the frequency of the herald photon, and find that frequency-resolving measurement of the herald photon is necessary to produce high-purity biphotons. We also find a trade-off between the rate of successful entanglement swapping and both the purity and quantified entanglement resource (negativity) of the heralded biphoton state.

AB - Photonic time-frequency entanglement is a promising resource for quantum information processing technologies. We investigate swapping of continuous-variable entanglement in the time-frequency degree of freedom using three-wave mixing in the low-gain regime with the aim of producing heralded biphoton states with high purity and low multipair probability. Heralding is achieved by combining one photon from each of two biphoton sources via sum-frequency generation to create a herald photon. We present a realistic model with pulsed pumps, investigate the effects of resolving the frequency of the herald photon, and find that frequency-resolving measurement of the herald photon is necessary to produce high-purity biphotons. We also find a trade-off between the rate of successful entanglement swapping and both the purity and quantified entanglement resource (negativity) of the heralded biphoton state.

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DO - 10.1103/PhysRevA.98.023836

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Entanglement swapping for generation of heralded time-frequency-entangled photon pairs

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