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BEGIN:VEVENT
SUMMARY:Stefano Profumo (Santa Cruz Institute for Particle Physics and Uni
versity of California\, Santa Cruz\, California\, USA)
DTSTART;VALUE=DATE-TIME:20200507T140000Z
DTEND;VALUE=DATE-TIME:20200507T153000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/1
DESCRIPTION:Title: What is the Dark Matter?\nby Stefano Profumo (Santa Cru
z Institute for Particle Physics and University of California\, Santa Cruz
\, California\, USA) as part of Quantum Aspects of Space-Time and Matter\n
\n\nAbstract\nFour fifths of the matter in the universe is made of somethi
ng completely different from the "ordinary matter" we know and love. I wil
l explain why this "dark matter" is an unavoidable ingredient to explain t
he universe as we observe it\, and I will describe what the fundamental\,
particle nature of the dark matter could possibly be. I will then give an
overview of strategies to search for dark matter as a particle\, describe
a few examples of possible hints of discovery\, and outline ways forward i
n this exciting hunt.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Subir Sachdev (Department Chair\, Herchel Smith Professor of Physi
cs\, Department of Physics\, Harvard University\, Boston\, USA)
DTSTART;VALUE=DATE-TIME:20200514T150000Z
DTEND;VALUE=DATE-TIME:20200514T170000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/2
DESCRIPTION:Title: Linear in temperature resistivity in the limit of zero
temperature from the time reparameterization soft mode\nby Subir Sachdev (
Department Chair\, Herchel Smith Professor of Physics\, Department of Phys
ics\, Harvard University\, Boston\, USA) as part of Quantum Aspects of Spa
ce-Time and Matter\n\nLecture held in QASTM seminar series talk.\n\nAbstra
ct\nThe most puzzling aspect of the `strange metal' behavior of correlated
electron compounds is that the linear in temperature resistivity often ex
tends down to low temperatures\, lower than natural microscopic energy sca
les. We consider recently proposed deconfined critical points (or phases)
in models of electrons in large dimension lattices with random nearest-nei
ghbor exchange interactions. The criticality is in the class of Sachdev-Ye
-Kitaev models\, and exhibits a time reparameterization soft mode represen
ting gravity in dual holographic theories. We compute the low-temperature
resistivity in a large M limit of models with SU(M) spin symmetry\, and fi
nd that the dominant temperature dependence arises from this soft mode. Th
e resistivity is linear in temperature down to zero temperature at the cri
tical point\, with a co-efficient universally proportional to the product
of the residual resistivity and the co-efficient of the linear in temperat
ure specific heat. We argue that the time reparameterization soft mode off
ers a promising and generic mechanism for resolving the strange metal puzz
le.\n
LOCATION:Lecture held in QASTM seminar series talk
END:VEVENT
BEGIN:VEVENT
SUMMARY:Zohar Komargodski (Simons Center for Geometry and Physics\, Stony
Brook University (SUNY Stony Brook)\, New York\, USA)
DTSTART;VALUE=DATE-TIME:20200518T160000Z
DTEND;VALUE=DATE-TIME:20200518T173000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/3
DESCRIPTION:Title: Thermal order in conformal theories\nby Zohar Komargods
ki (Simons Center for Geometry and Physics\, Stony Brook University (SUNY
Stony Brook)\, New York\, USA) as part of Quantum Aspects of Space-Time an
d Matter\n\n\nAbstract\nIt is widely expected that at sufficiently high te
mperatures order is always lost\, e.g. magnets loose their ferromagnetic p
roperties. We pose the question of whether this is always the case in the
context of quantum field theory in d space dimensions. More concretely\, o
ne can ask whether there exist critical points (CFTs) which break some glo
bal symmetry at arbitrary finite temperature. The most familiar CFTs do no
t exhibit symmetry breaking at finite temperature\, and moreover\, in the
context of the AdS/CFT correspondence\, critical points at finite temperat
ure are described by an uncharged black brane which obeys a no-hair theore
m. Yet\, we show that there exist CFTs which have some of their internal s
ymmetries broken at arbitrary finite temperature. Our main example is a ve
ctor model which we study both in the epsilon expansion and arbitrary rank
as well as the large rank limit (and arbitrary dimension). The large rank
limit of the vector model displays a conformal manifold\, a moduli space
of vacua\, and a deformed moduli space of vacua at finite temperature. The
appropriate Nambu-Goldstone bosons including the dilaton-like particle ar
e identified. Using these tools we establish symmetry breaking at finite t
emperature for finite small ϵ. We also prove that a large class of other
fixed points\, which describe some of the most common quantum magnets\, in
deed behave as expected and do not break any global symmetry at finite tem
perature. We discuss some of the consequences of finite temperature symmet
ry breaking for the spectrum of local operators. Finally\, we propose a cl
ass of fixed points which appear to be possible candidates for finite temp
erature symmetry breaking in d=2.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Leonardo Senatore (Institute for Theoretical Physics\, Stanford Un
iversity\, California\, USA)
DTSTART;VALUE=DATE-TIME:20200521T150000Z
DTEND;VALUE=DATE-TIME:20200521T163000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/4
DESCRIPTION:Title: From $\\lambda\\phi^4$ in dS to how inflation starts ou
t of inhomogenous initial conditions\nby Leonardo Senatore (Institute for
Theoretical Physics\, Stanford University\, California\, USA) as part of Q
uantum Aspects of Space-Time and Matter\n\n\nAbstract\nI will first descri
be how we develop a systematic formalism to compute correlation functions
of massless scalar fields in de Sitter space. Time permitting\, I will the
n show how\, using a combination of numerical techniques as well as techn
iques from differential geometry\, we are shedding light on how inflation
starts out of inhomogenous initial conditions.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Guilherme Leite Pimentel (University of Amsterdam and Leiden Unive
rsity\, Netherlands)
DTSTART;VALUE=DATE-TIME:20200525T120000Z
DTEND;VALUE=DATE-TIME:20200525T133000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/5
DESCRIPTION:Title: Bootstrapping cosmological fluctuations\nby Guilherme L
eite Pimentel (University of Amsterdam and Leiden University\, Netherlands
) as part of Quantum Aspects of Space-Time and Matter\n\n\nAbstract\nI wil
l describe a new method to compute and constrain the possible shapes of pr
imordial correlation functions from inflation. This ``cosmological bootstr
ap” draws inspiration from the recent advances\nin understanding the tre
e-level S-matrix in flat space\, as well as the conformal bootstrap of pha
se transitions. I will also comment on various unexplored directions for f
uture research.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Eva Silverstein (Institute for Theoretical Physics\, Stanford Univ
ersity\, California\, USA)
DTSTART;VALUE=DATE-TIME:20200528T150000Z
DTEND;VALUE=DATE-TIME:20200528T163000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/6
DESCRIPTION:Title: Multipoint correlators in multifield cosmology: formal
structure and applications\nby Eva Silverstein (Institute for Theoretical
Physics\, Stanford University\, California\, USA) as part of Quantum Aspec
ts of Space-Time and Matter\n\n\nAbstract\nConnected N-point amplitudes in
quantum field theory are\nenhanced by a factor of N! inappropriate regime
s of kinematics and\ncouplings\, but the non-perturbative analysis of this
for collider\nphysics applications is subtle. We will start by briefly r
eviewing\nthis effect and related developments in large-charge sectors of\
nquantum field theory. We then resolve the question in the affirmative\nf
or N-point correlation functions of cosmological perturbations in\nmultifi
eld inflation and comment on its application to primordial\nnon-Gaussianit
y. We find that they are calculably N!-enhanced using a\nsimple model for
the mixing of the field sectors which leads to a\nconvolution of their pro
bability distributions. This effect leads to\nmodel-dependent but interest
ing prospects for enhanced observational\nsensitivity. Additional spinoff
s include applications to primordial\nblack hole production and a new infl
ationary model with a controlled\nresummation of derivative interactions.\
n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Matias Zaldarriaga (School of Natural Sciences\, Astrophysics and
Cosmology\, Institute for Advanced Studies\, Princeton\, USA)
DTSTART;VALUE=DATE-TIME:20200601T130000Z
DTEND;VALUE=DATE-TIME:20200601T150000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/7
DESCRIPTION:Title: Challenges for physical cosmology after Planck\nby Mati
as Zaldarriaga (School of Natural Sciences\, Astrophysics and Cosmology\,
Institute for Advanced Studies\, Princeton\, USA) as part of Quantum Aspec
ts of Space-Time and Matter\n\n\nAbstract\nI will summarize the current st
ate of physical cosmology. I will describe the open questions that remain
and the challenges that need to be overcome to make progress.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Harmann Nicolai (Director and Senior Professor\, Max Planck Instit
ute for Gravitational Physics\, Potsdam\, Germany)
DTSTART;VALUE=DATE-TIME:20200604T120000Z
DTEND;VALUE=DATE-TIME:20200604T133000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/8
DESCRIPTION:Title: E10 Cosmology\nby Harmann Nicolai (Director and Senior
Professor\, Max Planck Institute for Gravitational Physics\, Potsdam\, Ger
many) as part of Quantum Aspects of Space-Time and Matter\n\n\nAbstract\nI
n this talk\, I will review work done with A. Kleinschmidt (hep-th/0511290
)\, where it is shown how to construct simple exact cosmological solutions
to the E10/K(E10)coset model by exploiting its integrability. Using the k
nown correspondences with the bosonic sectors of maximal supergravity theo
ries\, these exact solutions translate to exact cosmological solutions of
M theory\, first found by Townsend and Wohlfarth\, and Ohta\, exhibiting i
ntermittent periods of accelerated expansion.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Axel Kleinschmidt (Professor and Senior Scientist\, Quantum Gravit
y and Unified Theories Group\, Max Planck Institute for Gravitational Phys
ics\, Potsdam\, Germany)
DTSTART;VALUE=DATE-TIME:20200608T130000Z
DTEND;VALUE=DATE-TIME:20200608T143000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/9
DESCRIPTION:Title: Generating series for closed string scattering at genus
one\nby Axel Kleinschmidt (Professor and Senior Scientist\, Quantum Gravi
ty and Unified Theories Group\, Max Planck Institute for Gravitational Phy
sics\, Potsdam\, Germany) as part of Quantum Aspects of Space-Time and Mat
ter\n\n\nAbstract\nThe low-energy limit of closed string scattering amplit
udes has recently received an increased amount of attention due to new con
nections to number theory and automorphic forms that I will explain in thi
s talk. The low-energy expansion for n-point scattering can be formulated
in terms of objects called modular graph forms. Writing down these forms i
s easy but analysing them less so since they satisfy an intricate web of s
urprising relations. I will discuss recent progress on systematising their
properties based on generating function techniques and comment on a relat
ion between open and closed string scattering. The talk is mainly based on
1911.03476 and 2004.05156.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sumit R. Das (Professor\, Kentucky University\, USA)
DTSTART;VALUE=DATE-TIME:20200611T133000Z
DTEND;VALUE=DATE-TIME:20200611T153000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/10
DESCRIPTION:Title: QUANTUM QUENCH AND EMERGENT SPACE-TIMES\nby Sumit R. Da
s (Professor\, Kentucky University\, USA) as part of Quantum Aspects of Sp
ace-Time and Matter\n\n\nAbstract\nWe will discuss some aspects of scaling
in quantum quench and its realization in holography. We then consider qua
ntum quench in the singlet sector of the c=1 Matrix Model and map out the
emergent dual space-time. As expected the late time s[ace-time does not co
ntain black holes. Rather\, they generically have space-like regions of la
rge coupling analogous to cosmological singularities.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Igor R. Klebanov (Professor\, Princeton University\, USA)
DTSTART;VALUE=DATE-TIME:20200615T133000Z
DTEND;VALUE=DATE-TIME:20200615T153000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/11
DESCRIPTION:Title: Breaking of Discrete and Continuous Symmetries in SYK-l
ike Models\nby Igor R. Klebanov (Professor\, Princeton University\, USA) a
s part of Quantum Aspects of Space-Time and Matter\n\n\nAbstract\nA Majora
na fermion is the most elemental quantum degree of freedom – a pair of t
hem has only two quantum states. Yet\, a large number of fermions with int
eractions coupling four of them at a time can exhibit interesting quantum
dynamics. Models of this kind include the Sachdev-Ye-Kitaev (SYK) model\,
where the coefficients of quartic interactions are randomly distributed\,
and the Tensor models\, where they respect continuous symmetries. These mo
dels exhibit approximate invariance under scaling of the time and have pow
er law fall-off of the correlation functions. In this talk we will discuss
a pair of SYK or Tensor models coupled by the quartic interactions\, and
show that they produce a richer set of phenomena. These include a line of
fixed points\, where critical exponents vary along the line and formally a
cquire imaginary parts outside it. For one sign of the coupling constant\,
the approximate scale invariance continues to hold. For the other\, a gap
opens in the energy spectrum\, resulting in exponential fall-off of corre
lation functions. This is indicative of breaking of a discrete symmetry. T
hus\, our quantum mechanical model exhibits dynamical phenomena characteri
stic of higher dimensional quantum field theories. Furthermore\, the gappe
d phase of our model may be dual to a certain traversable wormhole in two-
dimensional space-time. The talk will end with a similar discussion of a p
air of complex SYK models coupled by a quartic interaction which preserves
the U(1) x U(1) symmetry. For a range of parameters\, this model gives ri
se to breaking of one of the U(1) symmetries. This is demonstrated via an
analysis of the large N Dyson-Schwinger equations\, as well as by Exact Di
agonalizations of the finite N Hamiltonians.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Daniele Oriti (Professor\, Arnold Sommerfeld Center for Theoretica
l Physics • Ludwig-Maximilians-Universität (LMU) München)
DTSTART;VALUE=DATE-TIME:20200618T120000Z
DTEND;VALUE=DATE-TIME:20200618T140000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/12
DESCRIPTION:Title: What is space? what is time? the quest for quantum grav
ity\nby Daniele Oriti (Professor\, Arnold Sommerfeld Center for Theoretica
l Physics • Ludwig-Maximilians-Universität (LMU) München) as part of Q
uantum Aspects of Space-Time and Matter\n\n\nAbstract\nWe introduce the pr
oblem of quantum gravity\, its motivations and challenges at the conceptua
l as well as physical level. In particular\, we emphasize how constructing
a new consistent quantum theory of the gravitational field implies deepen
ing our understanding of the nature of space and time themselves. We overv
iew existing theoretical approaches and proposals\, and some recent result
s. Among the most recent suggestions\, we illustrate the idea that spaceti
me itself could be understood as an emergent notion\, and that geometry an
d topology may find their root in quantum entanglement. Finally\, we illus
trate some of the general points by discussing one specific quantum gravit
y formalism\, so-called group field theories\, a promising recent blend (a
nd evolution) of matrix/tensor models\, loop quantum gravity and lattice q
uantum gravity\, we discuss how cosmology could be understood\, from a qua
ntum gravity perspective\, and how effective cosmological equations can be
extracted from group field theories.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jared Kaplan (Professor\, Johns Hopkins University\, USA)
DTSTART;VALUE=DATE-TIME:20200622T133000Z
DTEND;VALUE=DATE-TIME:20200622T153000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/13
DESCRIPTION:Title: Machine Learning and How Physicists Can Think About It\
nby Jared Kaplan (Professor\, Johns Hopkins University\, USA) as part of Q
uantum Aspects of Space-Time and Matter\n\n\nAbstract\nIn the last eight y
ears there has been an explosion of progress in Machine Learning. In this
colloquium I'll explain the (very simple) ideas underlying Neural Network
s\, and give a few examples of their structure and current capabilities.
Then I'll survey the increasing scales of data and computation in this fie
ld\, and make some comparisons and projections to see where it could be he
aded. If time permits\, I'll also discuss my recent work on scaling laws
for machine learning\, and its connection to language models and GPT-3.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Max Zimet (Center for the Fundamental Laws of Nature High Energy T
heory Group and Black Hole initiative fellow\, Harvard University\, Boston
\, USA)
DTSTART;VALUE=DATE-TIME:20200625T130000Z
DTEND;VALUE=DATE-TIME:20200625T150000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/14
DESCRIPTION:Title: K3 metrics\nby Max Zimet (Center for the Fundamental La
ws of Nature High Energy Theory Group and Black Hole initiative fellow\, H
arvard University\, Boston\, USA) as part of Quantum Aspects of Space-Time
and Matter\n\n\nAbstract\nI will explain the recent physically motivated
construction of Ricci-flat K3 metrics in 2006.02435\, which gives the firs
t examples of Ricci-flat metrics on compact non-toroidal Calabi-Yau manifo
lds. I will also relate it — both physically and mathematically — to a
second such construction\, which is as yet not completely explicit: the m
issing data is the BPS index of a little string theory on $T^2$. In partic
ular\, I will show that these discrete invariants may be extracted from th
e metrics produced by the first approach.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Aninda Sinha (CHEP\, IISC\, Bengaluru)
DTSTART;VALUE=DATE-TIME:20200702T120000Z
DTEND;VALUE=DATE-TIME:20200702T143000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/16
DESCRIPTION:Title: Bootstrapping CFTs and QFTs\nby Aninda Sinha (CHEP\, II
SC\, Bengaluru) as part of Quantum Aspects of Space-Time and Matter\n\n\nA
bstract\nI will review some recent developments in the bootstrap approach
towards understanding quantum field theories. I will begin by using the bo
otstrap to do epsilon expansion ala Wilson-Fisher to calculate critical ex
ponents and OPE coefficients (relevant for the 3d Ising model)—the latte
r being something that is difficult to calculate using traditional Feynman
diagram approach. This is an example of a conformal field theory and will
use techniques of the conformal bootstrap. Then I will discuss some recen
t work to constrain the space of S-matrices for pion scattering in the sta
ndard model of particle physics using the recent reincarnation of the S-ma
trix bootstrap. In the course\, I will also introduce and examine certain
quantum information ideas which will aid us in understanding the space of
S-matrices.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Fernando Quevedo (Department of Applied Mathematics and Theoretica
l Physics (DAMTP)\, University of Cambridge\, UK)
DTSTART;VALUE=DATE-TIME:20200629T120000Z
DTEND;VALUE=DATE-TIME:20200629T143000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/17
DESCRIPTION:Title: String Theory Cosmology Before\, During and After Infla
tion\nby Fernando Quevedo (Department of Applied Mathematics and Theoretic
al Physics (DAMTP)\, University of Cambridge\, UK) as part of Quantum Aspe
cts of Space-Time and Matter\n\n\nAbstract\nAn overview is given of ideas
incorporating the inflationary scenario in string theory. The physics of m
oduli fields from string theory is used to address questions about the ori
gin of inflation\, its realization\, and the physics after inflation.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:James Sully (String Theory Group\, Department of Physics and Astro
nomy\, University of British Columbia\, Vancouver\, British Columbia\, Can
ada)
DTSTART;VALUE=DATE-TIME:20200706T150000Z
DTEND;VALUE=DATE-TIME:20200706T173000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/18
DESCRIPTION:Title: Eigenstate thermalization and disorder averaging in gra
vity\nby James Sully (String Theory Group\, Department of Physics and Astr
onomy\, University of British Columbia\, Vancouver\, British Columbia\, Ca
nada) as part of Quantum Aspects of Space-Time and Matter\n\nInteractive l
ivestream: https://mpi-aei.zoom.us/j/97623339163\n\nAbstract\nIt has long
been believed that progress in understanding the black hole information pa
radox would require coming to terms with microscopic details of quantum gr
avity---something beyond the reach of semiclassical effective field theory
. In that light\, one of the most surprising discoveries of the last year
has been that signature features of the unitary evaporation of black holes
can already be seen within effective field theory\, albeit with the inclu
sion of 'euclidean wormholes'. However\, these novel contributions are bes
t understood when the gravitational theory is not a single microscopic the
ory\, but an average over many different theories. To save unitarity must
we then simultaneously throw it away? I will explain how the same story ca
n be recovered within a single microscopic theory by thinking carefully ab
out the right effective theory for finite-lifetime observers.\n
URL:https://mpi-aei.zoom.us/j/97623339163
END:VEVENT
BEGIN:VEVENT
SUMMARY:Paolo Creminelli (Head\, High Energy\, Cosmology and Astroparticle
Physics (HECAP)\, The Abdus Salam International Centre for Theoretical Ph
ysics (ICTP)\, Trieste\, Italy)
DTSTART;VALUE=DATE-TIME:20200709T120000Z
DTEND;VALUE=DATE-TIME:20200709T143000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/19
DESCRIPTION:Title: Initial Conditions for Inflation\nby Paolo Creminelli (
Head\, High Energy\, Cosmology and Astroparticle Physics (HECAP)\, The Abd
us Salam International Centre for Theoretical Physics (ICTP)\, Trieste\, I
taly) as part of Quantum Aspects of Space-Time and Matter\n\nInteractive l
ivestream: https://mpi-aei.zoom.us/j/97623339163\n\nAbstract\nCosmic infla
tion makes the universe flat and homogeneous\, but under what conditions i
nflation starts? I will discuss analytical results that show\, with weak a
ssumptions\, that inflation starts somewhere and some theorems in 2+1 and
3+1 dimensions that support the de Sitter no-hair conjecture.\n
URL:https://mpi-aei.zoom.us/j/97623339163
END:VEVENT
BEGIN:VEVENT
SUMMARY:Eugenio Bianchi (Department of Physics and Institute for Gravitati
on & the Cosmos Center for Fundamental Theory\, Pennsylvania State Univers
ity\, Pennsylvania\, USA)
DTSTART;VALUE=DATE-TIME:20200713T130000Z
DTEND;VALUE=DATE-TIME:20200713T153000Z
DTSTAMP;VALUE=DATE-TIME:20200705T042423Z
UID:QASTM/20
DESCRIPTION:Title: Typicality of Small Spins in Primordial Black Holes: fr
om the Bekenstein-Hawking Entropy to Gravitational Wave Observations\nby E
ugenio Bianchi (Department of Physics and Institute for Gravitation & the
Cosmos Center for Fundamental Theory\, Pennsylvania State University\, Pen
nsylvania\, USA) as part of Quantum Aspects of Space-Time and Matter\n\nIn
teractive livestream: https://mpi-aei.zoom.us/j/97623339163\n\nAbstract\nB
lack hole entropy is a robust prediction of quantum gravity with no explor
ed phenomenological consequences to date. In this talk\, I discuss how the
Bekenstein-Hawking entropy formula allows us to determine the probability
distribution of the spin of black holes produced by the collapse of pertu
rbations distributed according to a general relativistic microcanonical en
semble. I will also discuss why this ensemble is relevant for black holes
formed in the early universe\, resulting in a population of black holes wi
th zero spin. In principle\, the identification of such a population at LI
GO\, Virgo\, and future gravitational wave observatories could provide the
first observational evidence for the statistical nature of black hole ent
ropy.\n
URL:https://mpi-aei.zoom.us/j/97623339163
END:VEVENT
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