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SUMMARY:Promotionsvortrag Physik: Narrowband quantum light sources and
  their use for quantum communication
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 00000010000000162F2A31C90BD443BF85C506E05FD0F2
DESCRIPTION:Ankündigung des Promotionsvortrags von: Herrn Sheng-Hsuan
  Huang Single-photon sources play a crucial role in quantum informatio
 n processing. Among the various methods for generating single photons\
 , spontaneous parametric down-conversion (SPDC) is one of the most wid
 ely used and has been implemented across different platforms. Among th
 ese\, crystalline whispering-gallery-mode resonators (WGMRs) represent
  an intriguing platform for re-alizing SPDC-based sources. They have b
 een shown to be capable of efficiently interacting with alkali atoms d
 ue to their narrow and tunable emission bandwidths. Moreover\, they op
 erate with relatively low pump power\, which is advantageous for large
 -scale integration and power-con-strained applications. Here\, I will 
 present three experiments conducted during my doctoral thesis to furth
 er demonstrate the versatility of WGMR-based SPDC sources. First\, we 
 generate polarization-entangled photon pairs using an interferometric 
 scheme\, achieving a Clauser-Horne-Shimony-Holt inequality pa-rameter 
 of 𝑆𝑆=2.54±0.06\, violating the classical bound by over eight s
 tandard deviations. Second\, we observe Hong-Ou-Mandel interference wi
 th visibilities of 74% and 76% for photons from one and two independen
 t WGMRs\, respectively\, using an in-coupled pump power as low as 50nW
 . Finally\, we demonstrate photon-ion interaction between a WGMR-gener
 ated photon and a 174Yb+ ion with a success probability of 8%. Togethe
 r\, these results highlight the potential of WGMR-based SPDC sources f
 or scalable quantum networks and hybrid quantum systems. (Vortrag auf 
 Englisch) Dem Vortrag schließt sich eine Diskussion von 15 Minuten an
 . Vortrag und Diskussion sind öffentlich. Diesen Verfahrensteilen fol
 gt ein nicht öffentliches Rigorosum von 45 Minuten.
DTSTART:20260728T140000Z
DTEND:20260728T153000Z
LOCATION:A 2.500 Bibliothek\, MPI\, Staudtstr. 2\, Erlangen
DTSTAMP:20260716T221441Z
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