Please note that the event "Enhanced power spectra from multi-field inflation"
will start on 16 Apr 2024, 16:00 (Asia/Seoul).
It will take place at room Room 1423 (KIAS).
You can access the full event here:
https://indico.kias.re.kr/e/295
Description
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Title: Enhanced power spectra from multi-field inflation
Speaker: Dr. Perseas Christodoulidis (Ewha Womans U., Seoul)
Abstract: We investigate the enhancement of the power spectra in models with
multiple scalar fields large enough to produce primordial black holes. We
present analytic solutions for the perturbations in the case of constant turns
without the need for an effective field theory for the first time and clarify
the role of the Hubble friction that has been overlooked previously. For an
arbitrary number of fields we derive the criteria that can lead to an
exponential amplification of the curvature perturbation on subhorizon scales,
while leaving the perturbations stable on superhorizon scales. Finally, we
apply our results on a three-field generalization of the "ultra-light" scenario
and show how the presence of field-space torsion can yield distinct observables
compared to the two-field case.
This talk will be based on 2311.04090.
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Indico :: Email Notifier
https://indico.kias.re.kr/e/295BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
METHOD:REQUEST
BEGIN:VEVENT
SUMMARY:Enhanced power spectra from multi-field inflation
DTSTART;VALUE=DATE-TIME:20240416T070000Z
DTEND;VALUE=DATE-TIME:20240416T083000Z
DTSTAMP;VALUE=DATE-TIME:20240411T070000Z
UID:indico-event-295@xxxxxxxxxxxxxxxxx
DESCRIPTION:Speakers: Perseas Christodoulidis (Ewha Womans U.\, Seoul)\n\n
Title: Enhanced power spectra from multi-field inflationSpeaker: Dr. Pers
eas Christodoulidis (Ewha Womans U.\, Seoul)Abstract: We investigate the e
nhancement of the power spectra in models with multiple scalar fields larg
e enough to produce primordial black holes. We present analytic solutions
for the perturbations in the case of constant turns without the need for a
n effective field theory for the first time and clarify the role of the Hu
bble friction that has been overlooked previously. For an arbitrary number
of fields we derive the criteria that can lead to an exponential amplific
ation of the curvature perturbation on subhorizon scales\, while leaving t
he perturbations stable on superhorizon scales. Finally\, we apply our res
ults on a three-field generalization of the "ultra-light" scenario and sho
w how the presence of field-space torsion can yield distinct observables c
ompared to the two-field case.This talk will be based on 2311.04090.\n\nht
tps://indico.kias.re.kr/event/295/
LOCATION:Room 1423 (KIAS)
ORGANIZER;CN="KIAS HEP Events":mailto:noreply@xxxxxxxxxx
URL:https://indico.kias.re.kr/event/295/
END:VEVENT
END:VCALENDAR
