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BEGIN:VEVENT
SUMMARY:Klaus Fredenhagen (U Hamburg)
DTSTART:20200916T130000Z
DTEND:20200916T140000Z
DTSTAMP:20260422T230719Z
UID:LQP_Colloquium/1
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/LQP_Colloqui
 um/1/">Local covariance and dynamics in algebraic quantum field theory</a>
 \nby Klaus Fredenhagen (U Hamburg) as part of LQP Colloquium\n\nAbstract: 
 TBA\n
LOCATION:https://researchseminars.org/talk/LQP_Colloquium/1/
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BEGIN:VEVENT
SUMMARY:Horacio Casini (Bariloche Atomic Centre)
DTSTART:20210317T140000Z
DTEND:20210317T150000Z
DTSTAMP:20260422T230719Z
UID:LQP_Colloquium/2
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/LQP_Colloqui
 um/2/">Entanglement entropy and the renormalization group flow</a>\nby Hor
 acio Casini (Bariloche Atomic Centre) as part of LQP Colloquium\n\n\nAbstr
 act\nEntanglement entropy was originally introduced in the context of fiel
 d theory as a possible statistical origin of black hole entropy. This idea
  has been much refined and transformed for holographic theories\, giving p
 lace to many exciting new discoveries. In parallel\, our understanding of 
 entanglement entropy has been much increased in quantum field theories (no
  gravity). In this context\, it has been shown that the strong subadditive
  property of entropy combined with Lorentz invariance is behind the irreve
 rsibility of the renormalization group flow determining the change of the 
 theories with scale. We will review basic aspects of entanglement entropy 
 in quantum field theory and the ideas leading to this irreversibility. We 
 will end with some discussion around the question: what is lost along the 
 renormalization group?\n
LOCATION:https://researchseminars.org/talk/LQP_Colloquium/2/
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BEGIN:VEVENT
SUMMARY:Hirosi Ooguri (Caltech & Kavli IPMU)
DTSTART:20211124T160000Z
DTEND:20211124T173000Z
DTSTAMP:20260422T230719Z
UID:LQP_Colloquium/3
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/LQP_Colloqui
 um/3/">Symmetry in QFT and Gravity</a>\nby Hirosi Ooguri (Caltech & Kavli 
 IPMU) as part of LQP Colloquium\n\n\nAbstract\nI will review aspects of sy
 mmetry in quantum field theory and combine them with the AdS/CFT correspon
 dence to derive constraints on symmetry in quantum gravity. The quantum gr
 avity constraints to be discussed include the no-go theorem on global symm
 etry\, the completeness of gauge charges\, and the decomposition of high e
 nergy states into gauge group representations.\n
LOCATION:https://researchseminars.org/talk/LQP_Colloquium/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Feng Xu (UC Riverside)
DTSTART:20220316T160000Z
DTEND:20220316T173000Z
DTSTAMP:20260422T230719Z
UID:LQP_Colloquium/4
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/LQP_Colloqui
 um/4/">Rigorous results about entropy in QFT</a>\nby Feng Xu (UC Riverside
 ) as part of LQP Colloquium\n\n\nAbstract\nWe will present some rigorous r
 esults about Relative entropy and entropy in QFT\, motivated in part  by r
 ecent physicists work which however depends on heuristic arguments such as
  introducing cut off and using path integrals. In the particular case of C
 FT\, we will discuss interesting relations between relative entropy\, cent
 ral charge and global dimension of conformal net\, and asymptotics of entr
 opy which comes from split property.\n
LOCATION:https://researchseminars.org/talk/LQP_Colloquium/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jürg Fröhlich (ETH Zürich)
DTSTART:20230308T160000Z
DTEND:20230308T170000Z
DTSTAMP:20260422T230719Z
UID:LQP_Colloquium/5
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/LQP_Colloqui
 um/5/">Quantum Mechanics as a Complete Theory</a>\nby Jürg Fröhlich (ETH
  Zürich) as part of LQP Colloquium\n\n\nAbstract\nI present a proposal of
  how to complete Quantum Mechanics (QM) to a theory that actually makes se
 nse. The proposal is called ETH - Approach to QM\; “E ” standing for E
 vents\, “T ” for Trees\, and “H ” for Histories. This approach sup
 plies the last one of three pillars QM can be constructed upon\, which are
 :\n\n   (i) physical quantities characteristic of a system are represented
  by selfadjoint operators. Their time evolution is given by the Heisenberg
  equations\;\n\n  (ii) introduce meaningful notions of states and of poten
 tial and actual events\;\n\n(iii) find a general Law for the non-linear st
 ochastic time evolution of states of individual systems.\n\nAfter explaini
 ng some general ideas underlying the ETH-Approach I discuss an application
  to the quantum theory of fluorescence of an atom coupled to the radiation
  field. My general goal is to help removing some of the enormous confusion
  befuddling many people who claim to work on the foundations of QM.\n
LOCATION:https://researchseminars.org/talk/LQP_Colloquium/5/
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