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X-WR-CALNAME;VALUE=TEXT:Department of Physics
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TZID:America/New_York
BEGIN:STANDARD
DTSTART:20171105T020000
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
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DTSTART:20170312T020000
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
RDATE:20180311T020000
TZNAME:EDT
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BEGIN:VEVENT
UID:calendar.5711.field_events_date.0@phy.princeton.edu
DTSTAMP:20180223T045537Z
CATEGORIES:High Energy Theory Seminar
CREATED:20170906T150600Z
DESCRIPTION:A complete and universal equivalence between soft theorems inqu
antum field theories and asymptotic symmetries in flat spacetimes has rece
ntly emerged. We review these developments and show that the equivalence a
lso extends to theories with higher derivative interactions.
DTSTART;TZID=America/New_York:20170908T134500
DTEND;TZID=America/New_York:20170908T134500
LAST-MODIFIED:20170918T134825Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:HET Seminar at IAS | Prahar Mitra\, Member\, School of Natural Scie
nces\, IAS | 'Asymptotic Symmetries in Effective Field Theories'
URL;TYPE=URI:https://phy.princeton.edu/events/het-seminar-ias-prahar-mitra-
member-school-natural-sciences-ias-asymptotic-symmetries
END:VEVENT
BEGIN:VEVENT
UID:calendar.5716.field_events_date.0@phy.princeton.edu
DTSTAMP:20180223T045537Z
CATEGORIES:High Energy Theory Seminar
CREATED:20170906T151000Z
DESCRIPTION:The weak gravity conjecture (WGC) is a proposed bound on the ma
ss of a charged particle in a consistent low-energy effective theory. We s
tudy quantum corrections to black hole entropy arising from a charged but
WGC-violating scalar. In particular\, we study the laws of black hole ther
modynamics\, and identify several surprising features which contradict the
second and third laws in various regimes. This result is strong evidence
that the WGC is necessary for a consistent theory.\n\n
DTSTART;TZID=America/New_York:20170915T134500
DTEND;TZID=America/New_York:20170915T134500
LAST-MODIFIED:20170926T155746Z
LOCATION:PCTS Seminar Room
SUMMARY:HET Seminar | Zachary Fisher\, Perimeter Institute | 'Weak Gravity
Conjecture and Black Hole Thermodynamics' | PCTS Sem Rm
URL;TYPE=URI:https://phy.princeton.edu/events/het-seminar-zachary-fisher-pe
rimeter-institute-weak-gravity-conjecture-and-black-hole
END:VEVENT
BEGIN:VEVENT
UID:calendar.6296.field_events_date.0@phy.princeton.edu
DTSTAMP:20180223T045537Z
CATEGORIES:Biophysics Seminar
CREATED:20171116T221926Z
DTSTART;TZID=America/New_York:20170918T120000
DTEND;TZID=America/New_York:20170918T120000
LAST-MODIFIED:20171116T221926Z
LOCATION:Joseph Henry Room\, Jadwin Hall
SUMMARY:Biophysics Seminar: Cliff Brangwynne
URL;TYPE=URI:https://phy.princeton.edu/events/biophysics-seminar-cliff-bran
gwynne
END:VEVENT
BEGIN:VEVENT
UID:calendar.5796.field_events_date.0@phy.princeton.edu
DTSTAMP:20180223T045537Z
CATEGORIES:Condensed Matter Seminar
CREATED:20170912T154900Z
DESCRIPTION:Abstract: There is a long history to the idea that transport m
ay be subject to fundamental constraints. I will argue that variants of th
ese ideas offer promising ways to think about non-quasiparticle transport.
I will discuss both proposed lower and upper bounds on transport\, and I
will suggest that such bounds may address long-standing transport puzzles
in unconventional metals. I will discuss recent experimental probes of the
se ideas as well as theoretical connections to questions in quantum statis
tical mechanics.
DTSTART;TZID=America/New_York:20170918T130000
DTEND;TZID=America/New_York:20170918T130000
LAST-MODIFIED:20170926T155810Z
LOCATION:PCTS Seminar Room 407
SUMMARY:Condensed Matter Seminar\, Sean Hartnoll\, 'Bounds on transport'\,
PCTS Seminar Room 407
URL;TYPE=URI:https://phy.princeton.edu/events/condensed-matter-seminar-sean
-hartnoll-bounds-transport-pcts-seminar-room-407
END:VEVENT
BEGIN:VEVENT
UID:calendar.5736.field_events_date.0@phy.princeton.edu
DTSTAMP:20180223T045537Z
CATEGORIES:High Energy Theory Seminar
CREATED:20170906T152300Z
DESCRIPTION:I will present a general argument for the local bound on the nu
ll-null component of the stress tensor in a QFT called the Quantum Null En
ergy Condition. The argument involves the study of correlation functions o
f operators undergoing modular evolution associated to sub-regions of the
QFT. Causality constrains this modular evolution which in AdS/CFT is relat
ed to the requirement of entanglement wedge nesting - a property fundament
al to the study of subregion duality.
DTSTART;TZID=America/New_York:20170918T143000
DTEND;TZID=America/New_York:20170918T143000
LAST-MODIFIED:20170918T134849Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:HET Seminar at IAS | Thomas Faulkner\, UIllinois at Urbana-Champaig
n |“The Quantum Null Energy Condition from Causality”
URL;TYPE=URI:https://phy.princeton.edu/events/het-seminar-ias-thomas-faulkn
er-uillinois-urbana-champaign-%E2%80%9C-quantum-null-energy-condition
END:VEVENT
BEGIN:VEVENT
UID:calendar.5601.field_events_date.0@phy.princeton.edu
DTSTAMP:20180223T045537Z
CATEGORIES:Phenomenology Seminar
CREATED:20170823T141500Z
DESCRIPTION:Abstract: \n\nI will describe a few recent results and new dire
ctions in searching for the nature of dark matter as a particle with astro
nomical observations and with cosmic ray measurements.\n\n\n
DTSTART;TZID=America/New_York:20170919T163000
DTEND;TZID=America/New_York:20170919T163000
LAST-MODIFIED:20170926T155829Z
LOCATION:Jadwin 303
SUMMARY:Pheno & Vino Seminar\, Stefano Profumo\, UCSC\, 'Perspectives on as
trophysical searches for dark matter' Jadwin 303
URL;TYPE=URI:https://phy.princeton.edu/events/pheno-vino-seminar-stefano-pr
ofumo-ucsc-perspectives-astrophysical-searches-dark-matter
END:VEVENT
BEGIN:VEVENT
UID:calendar.5686.field_events_date.0@phy.princeton.edu
DTSTAMP:20180223T045537Z
CATEGORIES:Gravity Group Seminar
CREATED:20170906T132500Z
DESCRIPTION:Galaxy clusters are the largest gravitationally bound objects i
n the Universe and are excellent cosmological probes. Their power as cosmo
logical probes\, however\, is currently limited by the systematics involve
d in the measurement of their mass. In this talk\, I will discuss the meth
od to estimate their masses using the weak-gravitational lensing of the CM
B radiation. I will explain the systematics involved in the measurements a
nd the importance of using CMB polarization data in the future. Finally\,
I will discuss the uncertainties in the mass estimates for the current CMB
experiments and provide realistic forecasts for the CMB-S3/S4 experiments
.\n Reference: arXiv: 1705.00411\n\n\nSalads\, sandwiches\, and wraps are c
atered by D'Angelo Italian Market.\n Bottled water will be provided.\n\nPla
ce your lunch order\n\n\n
DTSTART;TZID=America/New_York:20170922T120000
DTEND;TZID=America/New_York:20170922T120000
LAST-MODIFIED:20170915T185739Z
LOCATION:Joseph Henry Room
SUMMARY:Gravity Group Lunch Seminar\, Srini Raghunathan (University of Melb
ourne\, AU)\, 'Measuring masses of galaxy clusters using CMB-cluster lensi
ng'
URL;TYPE=URI:https://phy.princeton.edu/events/gravity-group-lunch-seminar-s
rini-raghunathan-university-melbourne-au-measuring-masses-galaxy
END:VEVENT
BEGIN:VEVENT
UID:calendar.5906.field_events_date.0@phy.princeton.edu
DTSTAMP:20180223T045537Z
CATEGORIES:High Energy Theory Seminar
CREATED:20170915T185400Z
DESCRIPTION:I will give an overview of the integrability-based approach to
study correlation functions in planar N=4 SYM. The basic strategy is to 'd
ivide and conquer': We decompose the correlators of single-trace operators
into fundamental objects called hexagon form factors\, and compute each h
exagon form factor by using integrability. I will firstdiscuss how the met
hod works in three-point functions and then generalize it to higher-point
functions. Time permitting\, I will explain more recent developments and p
ossible future directions.
DTSTART;TZID=America/New_York:20170922T134500
DTEND;TZID=America/New_York:20170922T134500
LAST-MODIFIED:20170918T152906Z
LOCATION:Bloomberg Lecture Hall
SUMMARY:HET Seminar at IAS | Shota Komatsu\, Member\, School of Natural Sci
ences\, IAS | “Correlation Functions in N=4 SYM From Integrability”
URL;TYPE=URI:https://phy.princeton.edu/events/het-seminar-ias-shota-komatsu
-member-school-natural-sciences-ias-%E2%80%9Ccorrelation-functions-n4
END:VEVENT
BEGIN:VEVENT
UID:calendar.5626.field_events_date.0@phy.princeton.edu
DTSTAMP:20180223T045537Z
CATEGORIES:Condensed Matter Seminar
CREATED:20170824T152300Z
DESCRIPTION:Two types of interactions commonly drive new emergent phenomena
beyond textbook band theory in solids: electron correlation and spin orbi
t coupling. The first\, born from Mott’s observation that strong electro
n correlation can drive a system on the verge of being an insulator\, has
excited the condensed matter community over the past several decades and l
ies at the core of many unsolved phenomena\, such as unconventional superc
onductivity. The second has been vastly explored in the previous decades
in the context of Rashba effect and recently in the context of topological
phases of matter.\n\nThe real frontier today is to understand whether str
ongly interacting systems can exhibit any type of intrinsic topological or
der\, distinct from band topology in insulators and what consequences this
might have.\n\nIn this talk I will present experimental results for a var
iety of materials spanning a large range of interaction\, from strong corr
elation (Mott insulators)\, to strong spin orbit coupling (topological ins
ulators). I will present intriguing results on the interplay between thes
e two interactions and how\, even in the most extreme case\, they can give
rise to unexpected topological like features. The future of the field is
discussed.
DTSTART;TZID=America/New_York:20170925T131500
DTEND;TZID=America/New_York:20170925T131500
LAST-MODIFIED:20170926T155859Z
LOCATION:PCTS Seminar Room 407
SUMMARY:Condensed Matter Seminar\, Alessandra Lanzara\, Berkeley\, 'From Mo
tt Physics to Topology ' PCTS Seminar Room 407
URL;TYPE=URI:https://phy.princeton.edu/events/condensed-matter-seminar-ales
sandra-lanzara-berkeley-mott-physics-topology-pcts-seminar-room
END:VEVENT
BEGIN:VEVENT
UID:calendar.5721.field_events_date.0@phy.princeton.edu
DTSTAMP:20180223T045537Z
CATEGORIES:High Energy Theory Seminar
CREATED:20170906T151500Z
DESCRIPTION:Conformal invariance allows additional unique parity-odd tensor
-structures for three-point functions involving the stress tensor\, T\, an
d a conserved U(1) current\, j\, in 2+1 dimensional conformal field theori
es that violate parity\, apart from the usual parity even structures. Foll
owing the conformal collider physics setup of Hofman and Maldacena\, we pu
t constraints on the parity violating as well as parity preserving paramet
ers of a general CFT in d=3. We find that large N Chern-Simons theories co
upled to a fundamental fermion/boson saturate the bounds that we have deri
ved. An application of the conformal collider bounds is observed in the fo
rm of sum rules which puts constraints on spectral densities of any CFT at
finite temperature. We derive spectral sum rules in the shear channel for
conformal field theories at finite temperature in general $d\geq 3$ dimen
sions. We show that the sum rule can be written in terms the parity even H
ofman-Maldacena variables $t_2$\, $t_4$ which determine the three point fu
nction of the stress tensor. We then use collider constraints and obtain b
ounds on the sum rule which are valid in any CFT.
DTSTART;TZID=America/New_York:20170925T143000
DTEND;TZID=America/New_York:20170925T143000
LAST-MODIFIED:20170926T155911Z
LOCATION:PCTS Seminar Room
SUMMARY:HET Seminar | Subham Dutta Chowdhury\, Indian Institute of Science
| 'Conformal field theories and three point functions' | PCTS Seminar Rm
URL;TYPE=URI:https://phy.princeton.edu/events/het-seminar-subham-dutta-chow
dhury-indian-institute-science-conformal-field-theories-and
END:VEVENT
BEGIN:VEVENT
UID:calendar.5681.field_events_date.0@phy.princeton.edu
DTSTAMP:20180223T045537Z
CATEGORIES:High Energy Experiment Seminar
CREATED:20170831T193800Z
DESCRIPTION:Since the discovery of the Higgs boson in 2012\, the experiment
al program at the LHC has started to explore previously unreachable kinema
tical regimes\, where potentially new heavy particles can be produced. The
ATLAS and CMS ex- periments can search for new physics in a wide range of
final states with the highest sensitivity to date. Among all the possible
signatures\, final states in- volving photons\, despite the relatively sm
all cross section compared to hadronic signatures\, provide a powerful han
dle in the signal over background discrimi- nation. Such searches find the
ir motivation in a wide panorama of theoretical models such as minimal ext
ensions of the standard model\, extradimensions and dark matter. Over the
past few years a set of photon reconstruction and iden- tification techniq
ues have been developed and optimized in order to reach the detectors desi
gn performance. In this talk the most recent and promising results on sear
ches for new physics with photons in the final state obtained with the CMS
experiment at the LHC are presented. One of the most exciting results of
LHC Run 2\, concerning searches for high mass diphoton resonances\, is lar
gely discussed. Complementary analyses involving photons are also shown\,
such as searches for long-lived particles decaying to photons exploiting a
novel technique for delayed photon identification and searches for dark m
atter produced in asso- ciation with photons. Possible extensions to these
analyses and long term plans in preparation for the high-luminosity phase
of the LHC are finally described.
DTSTART;TZID=America/New_York:20170925T160000
DTEND;TZID=America/New_York:20170925T160000
LAST-MODIFIED:20170926T155926Z
LOCATION:Jadwin 303
SUMMARY:High Energy Physics Experimental Seminar-Livia Soffi-'Unvealing New
Physics with Photons at LHc CMS Experiment'\, Jadwin 303
URL;TYPE=URI:https://phy.princeton.edu/events/high-energy-physics-experimen
tal-seminar-livia-soffi-unvealing-new-physics-photons-lhc-cms
END:VEVENT
BEGIN:VEVENT
UID:calendar.5656.field_events_date.0@phy.princeton.edu
DTSTAMP:20180223T045537Z
CATEGORIES:Phenomenology Seminar
CREATED:20170829T141900Z
DESCRIPTION:Abstract: Dark matter that interacts with the standard model (
SM) through the “neutrino portal” is a possibility that is relatively less
well studied than other scenarios. In such a setup\, the dark matter comm
unicates with the SM primarily through its interactions with neutrinos. In
this talk\, I will motivate neutrino portal dark matter and discuss some
new tests of this possibility.\n\n
DTSTART;TZID=America/New_York:20170926T160000
DTEND;TZID=America/New_York:20170926T160000
LAST-MODIFIED:20170926T155944Z
LOCATION:Jadwin 303
SUMMARY:Pheno & Vino Seminar\, David Mckeen\, Univ. of Pittsburgh\, 'Neutri
no Portal Dark Matter' Jadwin 303
URL;TYPE=URI:https://phy.princeton.edu/events/pheno-vino-seminar-david-mcke
en-univ-pittsburgh-neutrino-portal-dark-matter-jadwin-303
END:VEVENT
BEGIN:VEVENT
UID:calendar.4951.field_events_date.0@phy.princeton.edu
DTSTAMP:20180223T045537Z
CATEGORIES:Donald R. Hamilton Colloquium
CREATED:20170802T185000Z
DESCRIPTION:Higher-spin gravity is a generalization of Einstein's general r
elativity\, which involves towers of interacting massless fields of arbitr
arily high spin. It has an infinite dimensional higher-spin gauge symmetry
\, and can be consistently constructed in the presence of a non-zero cosmo
logical constant. I will give an overview of higher-spin gravity theories\
, with a focus on their role in the context of the AdS/CFT correspondence\
, a remarkable 'holographic' duality between quantum gravity in anti-de Si
tter (AdS) space and conformal field theory (CFT) in one less dimension. H
igher-spin theories provide dual gravitational descriptions of some classi
c field theoretical models\, such as the Wilson-Fisher fixed point of the
O(N) vector model\, and the Gross-Neveu model. Generalizations of the high
er-spin AdS/CFT correspondence\, which involve the Chern-Simons gauge theo
ry\, have suggested new boson-fermion dualities in two spatial dimensions.
DTSTART;TZID=America/New_York:20170928T160000
DTEND;TZID=America/New_York:20170928T160000
LAST-MODIFIED:20170908T164212Z
LOCATION:Jadwin A10
SUMMARY:Hamilton Colloquium Series: Simone Giombi\, Princeton University\,
'Higher-spin gravity and conformal field theory'
URL;TYPE=URI:https://phy.princeton.edu/events/hamilton-colloquium-series-si
mone-giombi-princeton-university-higher-spin-gravity-and
END:VEVENT
BEGIN:VEVENT
UID:calendar.5691.field_events_date.0@phy.princeton.edu
DTSTAMP:20180223T045537Z
CATEGORIES:Gravity Group Seminar
CREATED:20170919T133100Z
DESCRIPTION:Galaxy clusters represent excellent laboratories to search for
Axion-Like Particles (ALPs). They contain magnetic fields which can induce
quasi-sinusoidal oscillations in the X-ray spectra of AGNs situated in or
behind them. Ultra-deep Chandra observations of the Perseus cluster conta
in over 5e5 counts from the central NGC1275 AGN\, and represent an extraor
dinary dataset for ALP searches. In this talk I will describe how we used
these to search for spectral irregularities from the AGN. No irregularitie
s were found at the ~30% level\, allowing us to place leading constraints
on the ALP-photon mixing parameter g_aγγ < 1.5e-12 1/GeV for m_a < 1e-12 e
V. I will move on to discuss the upcoming Athena X-ray Observatory\, due f
or launch in 2028. The X-ray Integral Field Unit (X-IFU) instrument onboar
d will be far better able to constrain ALPs than Chandra\, due to its exce
llent energy resolution. Using the SIXTE simulation software\, we estimate
that non-observation of spectral modulations for a 200 ks observation of
NGC1275 will constrain g_aγγ < 1.5e-13 1/GeV\, an order of magnitude impro
vement over that derived from Chandra data.\n\n \n\n\nSalads\, sandwiches\
, and wraps are catered by D'Angelo Italian Market.\n Bottled water will be
provided.\n\nPlace your lunch order\n\n\n
DTSTART;TZID=America/New_York:20170929T120000
DTEND;TZID=America/New_York:20170929T120000
LAST-MODIFIED:20170919T192538Z
LOCATION:Joseph Henry Room
SUMMARY:Gravity Group Lunch Seminar\, Nick Jennings (University of Oxford)\
, 'Searches for ALPs with Current and Future X-ray Satellites'
URL;TYPE=URI:https://phy.princeton.edu/events/gravity-group-lunch-seminar-n
ick-jennings-university-oxford-searches-alps-current-and-future
END:VEVENT
BEGIN:VEVENT
UID:calendar.5731.field_events_date.0@phy.princeton.edu
DTSTAMP:20180223T045537Z
CATEGORIES:High Energy Theory Seminar
CREATED:20170906T152000Z
DESCRIPTION:The frequency-dependent longitudinal and Hall conductivities --
- $\sigma_{xx}$ and $\sigma_{xy}$ --- are dimensionless functions of $\ome
ga/T$ in 2+1 dimensional CFTs at nonzero temperature. These functions char
acterize the spectrum of charged excitations of the theory and are basic e
xperimental observables. We compute these conductivities for large $N$ Che
rn-Simons theory with fermion matter. The computation is exact in the 't H
ooft coupling $\lambda$ at $N = \infty$. We describe various physical feat
ures of the conductivity\, including an explicit relation between the weig
ht of the delta function at $\omega = 0$ in $\sigma_{xx}$ and the existenc
e of infinitely many higher spin conserved currents in the theory. We also
compute the conductivities perturbatively in Chern-Simons theory with sca
lar matter and show that the resulting functions of $\omega/T$ agree with
the strong coupling fermionic result. This provides a new test of the conj
ectured 3d bosonization duality. In matching the Hall conductivities we re
solve an outstanding puzzle by carefully treating an extra anomaly that ar
ises in the regularization scheme used.
DTSTART;TZID=America/New_York:20170929T134500
DTEND;TZID=America/New_York:20170929T134500
LAST-MODIFIED:20170926T160008Z
LOCATION:PCTS Seminar Room
SUMMARY:HET Seminar | Raghu Mahajan\, Princeton U. | 'Transport in Chern-Si
mons-Matter Theories' | PCTS Seminar Rm
URL;TYPE=URI:https://phy.princeton.edu/events/het-seminar-raghu-mahajan-pri
nceton-u-transport-chern-simons-matter-theories-pcts-seminar-rm
END:VEVENT
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