Zhang, Wuhong ; Fickler, Robert ; Giese, Enno ; Chen, Lixiang ; Boyd, Robert W. (2019)
Influence of pump coherence on the generation of position-momentum entanglement in optical parametric down-conversion.
In: Optics Express, 27 (15)
doi: 10.1364/OE.27.020745
Artikel, Bibliographie
Kurzbeschreibung (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.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2019 |
| Autor(en): | Zhang, Wuhong ; Fickler, Robert ; Giese, Enno ; Chen, Lixiang ; Boyd, Robert W. |
| Art des Eintrags: | Bibliographie |
| Titel: | Influence of pump coherence on the generation of position-momentum entanglement in optical parametric down-conversion |
| Sprache: | Englisch |
| Publikationsjahr: | 2019 |
| Verlag: | OSA Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Optics Express |
| Jahrgang/Volume einer Zeitschrift: | 27 |
| (Heft-)Nummer: | 15 |
| DOI: | 10.1364/OE.27.020745 |
| URL / URN: | https://opg.optica.org/oe/fulltext.cfm?uri=oe-27-15-20745&id... |
| Kurzbeschreibung (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. |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Angewandte Physik 05 Fachbereich Physik > Institut für Angewandte Physik > Theoretische Quantenoptik 05 Fachbereich Physik > Institut für Angewandte Physik > Theoretische Quantenphysik |
| Hinterlegungsdatum: | 13 Jul 2022 08:22 |
| Letzte Änderung: | 05 Jan 2023 12:59 |
| PPN: | 503313130 |
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