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DTSTART;TZID=America/Santiago:20221102T140000
DTEND;TZID=America/Santiago:20221102T160000
DTSTAMP:20260505T124502
CREATED:20221101T032939Z
LAST-MODIFIED:20221101T032939Z
UID:4569-1667397600-1667404800@holography.cl
SUMMARY:Journal Club
DESCRIPTION:[vc_row][vc_column][vc_column_text]In this week’s Journal Club\, we have \n  \n\nFelipe Díaz (UNAB): “Thermal Fluctuations and Holographic Charged\nRenyi entropy”\n\nAbstract: “Renyi entropies correspond to a one-parameter generalization\nof Von-Neumann entropy but with some advantages; they are easier to\nstudy\, both numerically and experimentally. In the AdS/CFT context\, they\nhave been also shown to provide great insights into the comprehension of\nthe entropy area law and in the black hole information problem. For a\nCFT with a global symmetry\, it is possible to extend the notion to the\nso called “charged Renyi entropy” by means of a conformal map that leads\nto a grand canonical partition function with a Wilson loop encircling\nthe entangling region. This quantity has been conjectured to be\nholographically dual to charged black holes. In this talk we extend this\nresult to include nonlinear sources and compute the thermal fluctuations\non the gravity side. These corrections lead to a new logarithmic\ndivergence in the entanglement entropy which usually appear in a field\ntheory with spontaneous breaking of a continuous symmetry.” \n  \n\nAnthony Osses (UC): “Breve introducción a las amplitudes celestiales:\nel plano complejo de los pesos conformes”\n\nAbstract: “En esta charla se dará una breve introducción a “Amplitudes\ncelestiales”. Estas son una realización de holografia en espacios\nasintoticamente planos que mapea amplitudes de scattering en 4D\nfunciones a funciones de correlación de una aún desconocida 2D CFT. Se\ndará especial énfasis al rol que juega la estructura analítica de los\npesos conformes y cómo ésta conecta el IR y el UV de una nueva e\ninteresante manera.” \n[/vc_column_text][/vc_column][/vc_row]
URL:https://holography.cl/activity/journal-club/
LOCATION:Online\, Zoom
CATEGORIES:Journal Club
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BEGIN:VEVENT
DTSTART;TZID=America/Santiago:20221005T140000
DTEND;TZID=America/Santiago:20221005T160000
DTSTAMP:20260505T124502
CREATED:20221010T221048Z
LAST-MODIFIED:20230926T192455Z
UID:4758-1664978400-1664985600@holography.cl
SUMMARY:Journal Club
DESCRIPTION:[vc_row][vc_column][vc_column_text] \nThis week’s journal club: \n\n Anthonny Canazas (UNAB): “Una demostración con funciones signo y simetría conforme 1D”\n\nAbstract: The AdS2/CFT1 correspondence has recently drawn a lot of attention in our community. Understanding one-dimensional conformal symmetry is essential in such a scenario. This time we will discuss the expression Σ=sgn(τ1-τ2)+sgn(τ2-τ3)+sgn(τ3-τ4)+sgn(τ4-τ1) which arises in the context of calculating a 4-point function applying the GKPW prescription to a propagating scalar field in AdS2 with interpolating boundary conditions between Dirichlet and Neumann. The fact that Σ is conformally invariant and cannot be written as a function of the invariant u (cross ratio) challenges us to ask ourselves questions to reflect on. \n  \n\nRodrigo Olea (UNAB): “On minimal surfaces”\n\nAbstract: We explore the connection between the notion of minimality\nfor surfaces in manifolds with conical defects and what is usually computed from Variational Calculus. In addition\, in a holographic framework\, we renormalize the codimension-2 area functional for surfaces anchored to the conformal boundary. \n[/vc_column_text][/vc_column][/vc_row]
URL:https://holography.cl/activity/journal-club-2/
LOCATION:Online\, Zoom
CATEGORIES:Journal Club
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