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TZID:Europe/Berlin
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UID:2476@qft.physik.hu-berlin.de
DTSTART;TZID=Europe/Berlin:20260206T133000
DTEND;TZID=Europe/Berlin:20260206T143000
DTSTAMP:20260204T155725Z
URL:https://qft.physik.hu-berlin.de/next-seminars/ana-alonso-serrano-hu-be
 rlin/
SUMMARY:Ana Alonso-Serrano (HU Berlin) - 
DESCRIPTION:Speaker: Ana Alonso-Serrano (HU Berlin)\n\nTitle:Quantum estim
 ation of cosmological parameters\n\nAbstract:\nUnderstanding how well futu
 re cosmological experiments can reconstruct the mechanism that generated p
 rimordial inhomogeneities is key to assessing the extent to which cosmolog
 y can inform fundamental physics. In this talk\, I will introduce (in a si
 mple\, conceptual manner) a recent work where we apply a quantum metrology
  tool — the quantum Fisher information — to the squeezed quantum state
  describing cosmological perturbations at the end of inflation. This quant
 ifies the ultimate precision achievable in parameter estimation\, assuming
  ideal access to early-universe information\, and then we evaluate how clo
 se current observations come to this quantum limit. Focusing on the tensor
 -to-scalar ratio as a case study\, we found that the existence of a highly
  efficient (but presently inaccessible) optimal measurement. Conversely\, 
 I will show that accessing the decaying mode of inflationary perturbations
  is a necessary condition for exponentially improving the inference of the
  tensor-to-scalar ratio.\n\n\n\n\n\n\n\n\n\n\n\n\n\n
CATEGORIES:Pizza Seminars
LOCATION:Room 1.221\, IRIS building\, Zum großen Windkanal 6\, Berlin\, 12
 489\, Germany
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Zum großen Windkanal 6\, B
 erlin\, 12489\, Germany;X-APPLE-RADIUS=100;X-TITLE=Room 1.221\, IRIS build
 ing:geo:0,0
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TZID:Europe/Berlin
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