Photonic hybrid state entanglement swapping using cat state superpositions
| Autor: | Ryan C. Parker, Jaewoo Joo, Timothy P. Spiller |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Mathematics(all)
Computer science General Mathematics Cat state General Physics and Astronomy FOS: Physical sciences 02 engineering and technology Quantum channel Quantum entanglement Physics and Astronomy(all) Topology 01 natural sciences 020210 optoelectronics & photonics High fidelity EP/M013472/1 0103 physical sciences 0202 electrical engineering electronic engineering information engineering entanglement swapping quantum optics 010306 general physics Engineering(all) Quantum optics Bell state Quantum Physics business.industry General Engineering Special Feature RCUK quantum communications hybrid entanglement EPSRC State (computer science) Photonics business Quantum Physics (quant-ph) entanglement |
| Zdroj: | Parker, R C, Joo, J & Spiller, T P 2020, ' Photonic hybrid state entanglement swapping using cat state superpositions ', Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol. 476, no. 2243, 0237 . https://doi.org/10.1098/rspa.2020.0237 Proceedings. Mathematical, Physical, and Engineering Sciences |
| ISSN: | 1364-5021 |
| Popis: | We propose the use of hybrid entanglement in an entanglement swapping protocol, as means of distributing a Bell state with high fidelity to two parties, Alice and Bob. The hybrid entanglement used in this work is described as a discrete variable (Fock state) and a continuous variable (cat state superposition) entangled state. We model equal and unequal levels of photonic loss between the two propagating continuous variable modes, before detecting these states via a projective vacuum-one-photon measurement, and the other mode via balanced homodyne detection. We investigate homodyne measurement imperfections, and the associated success probability of the measurement schemes chosen in this protocol. We show that our entanglement swapping scheme is resilient to low levels of photonic losses, as well as low levels of averaged unequal losses between the two propagating modes, and show an improvement in this loss resilience over other hybrid entanglement schemes using coherent state superpositions as the propagating modes. Finally, we conclude that our protocol is suitable for potential quantum networking applications which require two nodes to share entanglement separated over a distance of 5-10 km when used with a suitable entanglement purification scheme. Comment: 17 pages, 15 figures |
| Databáze: | OpenAIRE |
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