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DTSTART:20171105T020000
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UID:calendar.1049896.field_date.0@bhi.fas.harvard.edu
DTSTAMP:20180621T181634Z
DESCRIPTION:\n Xinliang AnUniversity of Toronto\n\n\n\n Abstract:In the proce
ss of gravitational collapse\, singularities may form\, which are either c
overed by trapped surfaces (black holes) or visible to faraway observers (
naked singularities). In this talk\, with three different approaches comin
g from hyperbolic PDE\, quasilinear elliptic PDE and dynamical system\, I
will present results on four physical questions: i) Can “black holes” form
dynamically in the vacuum? ii) To form a “black hole”\, what is the least
size of initial data? iii) Can we find the boundary of a “black hole” reg
ion? Can we show that a “black hole region” is emerging from a point? iv)
For Einstein vacuum equations\, could singularities other than black hole
type form in gravitational collapse?\n\n\n\n Lampros LamprouMIT\n\n\n\n Abst
ract:Black holes have taught us that our world is a hologram --an idea pre
cisely articulated by the famous AdS/CFT correspondence. How does the geom
etry of spacetime emerge from its lower dimensional dual description?\n\n
\n\n I will build a set of diffeomorphism invariant operators in 3d Anti-de
Sitter space via integrals of fields over geodesics and derive their holo
graphic duals. The latter are special CFT operators associated with a boun
dary subregion\, called OPE blocks. I will then demonstrate that as we mov
e the subregion\, the OPE blocks undergo a local frame rotation\, analogou
s to a Berry rotation\, and the total 'Berry phase' acquired over closed p
aths computes the length of bulk curves.\n\n\n\n \;\n\n
DTSTART;TZID=America/New_York:20171114T133000
DTEND;TZID=America/New_York:20171114T143000
LAST-MODIFIED:20171205T163525Z
LOCATION:BHI Conference Room (211) 20 Garden Street\, Cambridge
SUMMARY:BHI Colloquium\, November 14 | 'On Singularity Formation in General
Relativity\,' Xinliang An | 'Bulk Geometry from CFT Berry Phases\,' Lampr
os Lamprou
URL;TYPE=URI:https://bhi.fas.harvard.edu/event/bhi-colloquium-november-14-z
inliang-lampros-lamprou
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