Zhang, Wuhong ; Fickler, Robert ; Giese, Enno ; Chen, Lixiang ; Boyd, Robert W. (2024)
Influence of pump coherence on the generation of position-momentum entanglement in optical parametric down-conversion.
In: Optics Express, 2019, 27 (15)
doi: 10.26083/tuprints-00027066
Article, Secondary publication, Publisher's Version
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Item Type: | Article |
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Type of entry: | Secondary publication |
Title: | Influence of pump coherence on the generation of position-momentum entanglement in optical parametric down-conversion |
Language: | English |
Date: | 13 August 2024 |
Place of Publication: | Darmstadt |
Year of primary publication: | 2019 |
Place of primary publication: | Washington, DC |
Publisher: | Optical Society of America |
Journal or Publication Title: | Optics Express |
Volume of the journal: | 27 |
Issue Number: | 15 |
Collation: | 9 Seiten |
DOI: | 10.26083/tuprints-00027066 |
Corresponding Links: | |
Origin: | Secondary publication service |
Abstract: | We examine experimentally how the degree of position-momentum entanglement of photon pairs depends on the transverse coherence of the pump beam that excites them in a process of spontaneous parametric down-conversion. Using spatially incoherent light from a light-emitting diode, we obtain strong position correlation of the photons, but we find that transverse momentum correlation, and thus entanglement, is entirely absent. When we continuously vary the degree of spatial coherence on the pump beam, we observe the emergence of stronger momentum correlations and entanglement. We present theoretical arguments that explain our experimental results. Our results shed light on entanglement generation and can be applied to control entanglement for quantum information applications. |
Status: | Publisher's Version |
URN: | urn:nbn:de:tuda-tuprints-270660 |
Classification DDC: | 500 Science and mathematics > 530 Physics |
Date Deposited: | 13 Aug 2024 13:19 |
Last Modified: | 13 Aug 2024 13:20 |
URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/27066 |
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