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BEGIN:VEVENT
SUMMARY:Klaus Fredenhagen (U Hamburg)
DTSTART:20200916T130000Z
DTEND:20200916T140000Z
DTSTAMP:20260404T111324Z
UID:LQP_Colloquium/1
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/LQP_C
 olloquium/1/">Local covariance and dynamics in algebraic quantum field the
 ory</a>\nby Klaus Fredenhagen (U Hamburg) as part of LQP Colloquium\n\nAbs
 tract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/LQP_Colloquium/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Horacio Casini (Bariloche Atomic Centre)
DTSTART:20210317T140000Z
DTEND:20210317T150000Z
DTSTAMP:20260404T111324Z
UID:LQP_Colloquium/2
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/LQP_C
 olloquium/2/">Entanglement entropy and the renormalization group flow</a>\
 nby Horacio Casini (Bariloche Atomic Centre) as part of LQP Colloquium\n\n
 \nAbstract\nEntanglement entropy was originally introduced in the context 
 of field theory as a possible statistical origin of black hole entropy. Th
 is idea has been much refined and transformed for holographic theories\, g
 iving place to many exciting new discoveries. In parallel\, our understand
 ing of entanglement entropy has been much increased in quantum field theor
 ies (no gravity). In this context\, it has been shown that the strong suba
 dditive property of entropy combined with Lorentz invariance is behind the
  irreversibility of the renormalization group flow determining the change 
 of the theories with scale. We will review basic aspects of entanglement e
 ntropy in quantum field theory and the ideas leading to this irreversibili
 ty. We will end with some discussion around the question: what is lost alo
 ng the renormalization group?\n
LOCATION:https://stable.researchseminars.org/talk/LQP_Colloquium/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hirosi Ooguri (Caltech & Kavli IPMU)
DTSTART:20211124T160000Z
DTEND:20211124T173000Z
DTSTAMP:20260404T111324Z
UID:LQP_Colloquium/3
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/LQP_C
 olloquium/3/">Symmetry in QFT and Gravity</a>\nby Hirosi Ooguri (Caltech &
  Kavli IPMU) as part of LQP Colloquium\n\n\nAbstract\nI will review aspect
 s of symmetry in quantum field theory and combine them with the AdS/CFT co
 rrespondence to derive constraints on symmetry in quantum gravity. The qua
 ntum gravity constraints to be discussed include the no-go theorem on glob
 al symmetry\, the completeness of gauge charges\, and the decomposition of
  high energy states into gauge group representations.\n
LOCATION:https://stable.researchseminars.org/talk/LQP_Colloquium/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Feng Xu (UC Riverside)
DTSTART:20220316T160000Z
DTEND:20220316T173000Z
DTSTAMP:20260404T111324Z
UID:LQP_Colloquium/4
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/LQP_C
 olloquium/4/">Rigorous results about entropy in QFT</a>\nby Feng Xu (UC Ri
 verside) as part of LQP Colloquium\n\n\nAbstract\nWe will present some rig
 orous results about Relative entropy and entropy in QFT\, motivated in par
 t  by recent physicists work which however depends on heuristic arguments 
 such as introducing cut off and using path integrals. In the particular ca
 se of CFT\, we will discuss interesting relations between relative entropy
 \, central charge and global dimension of conformal net\, and asymptotics 
 of entropy which comes from split property.\n
LOCATION:https://stable.researchseminars.org/talk/LQP_Colloquium/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jürg Fröhlich (ETH Zürich)
DTSTART:20230308T160000Z
DTEND:20230308T170000Z
DTSTAMP:20260404T111324Z
UID:LQP_Colloquium/5
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/LQP_C
 olloquium/5/">Quantum Mechanics as a Complete Theory</a>\nby Jürg Fröhli
 ch (ETH Zürich) as part of LQP Colloquium\n\n\nAbstract\nI present a prop
 osal of how to complete Quantum Mechanics (QM) to a theory that actually m
 akes sense. The proposal is called ETH - Approach to QM\; “E ” standin
 g for Events\, “T ” for Trees\, and “H ” for Histories. This appro
 ach supplies the last one of three pillars QM can be constructed upon\, wh
 ich are:\n\n   (i) physical quantities characteristic of a system are repr
 esented by selfadjoint operators. Their time evolution is given by the Hei
 senberg equations\;\n\n  (ii) introduce meaningful notions of states and o
 f potential and actual events\;\n\n(iii) find a general Law for the non-li
 near stochastic time evolution of states of individual systems.\n\nAfter e
 xplaining some general ideas underlying the ETH-Approach I discuss an appl
 ication to the quantum theory of fluorescence of an atom coupled to the ra
 diation field. My general goal is to help removing some of the enormous co
 nfusion befuddling many people who claim to work on the foundations of QM.
 \n
LOCATION:https://stable.researchseminars.org/talk/LQP_Colloquium/5/
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