BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Diptarka Das (IIT Kanpur) DTSTART:20210507T093000Z DTEND:20210507T110000Z DTSTAMP:20260422T225839Z UID:lethep/1 DESCRIPTION:Title: S ome universal aspects in out-of-equilibrium physics (Lecture 1)\nby Di ptarka Das (IIT Kanpur) as part of LETHEP seminars\n\n\nAbstract\nAbstract : In these lectures we shall discuss universalities in non-equilibrium ph ysics. A primary goal is to understand the late time fate of a closed quan tum system subjected to out of equilibrium dynamics. Typically\, systems e xhibit thermalization\, or at any rate some kind of equilibriation. To und erstand the fate is to identify the final ensemble that describes the syst em at late times. The other closely tied goal is to understand the mechani sm that leads to the equilibriation. The physics becomes more interesting in presence of $\\textit{chaos\, symmetry breakings}$ and $\\textit{critic al points}$. We will touch upon these various issues\, while aiming to get some universal lessons in order to help build non-equilibrium intuition.\ n LOCATION:https://researchseminars.org/talk/lethep/1/ END:VEVENT BEGIN:VEVENT SUMMARY:Diptarka Das (IIT Kanpur) DTSTART:20210514T093000Z DTEND:20210514T110000Z DTSTAMP:20260422T225839Z UID:lethep/2 DESCRIPTION:Title: S ome universal aspects in out-of-equilibrium physics (Lecture 2)\nby Di ptarka Das (IIT Kanpur) as part of LETHEP seminars\n\n\nAbstract\nAbstract : In these lectures we shall discuss universalities in non-equilibrium ph ysics. A primary goal is to understand the late time fate of a closed quan tum system subjected to out of equilibrium dynamics. Typically\, systems e xhibit thermalization\, or at any rate some kind of equilibriation. To und erstand the fate is to identify the final ensemble that describes the syst em at late times. The other closely tied goal is to understand the mechani sm that leads to the equilibriation. The physics becomes more interesting in presence of chaos\, symmetry breakings$ and critical points. We will to uch upon these various issues\, while aiming to get some universal lessons in order to help build non-equilibrium intuition.\n LOCATION:https://researchseminars.org/talk/lethep/2/ END:VEVENT BEGIN:VEVENT SUMMARY:Diptarka Das (IIT Kanpur) DTSTART:20210521T093000Z DTEND:20210521T110000Z DTSTAMP:20260422T225839Z UID:lethep/3 DESCRIPTION:Title: S ome universal aspects in out-of-equilibrium physics (Lecture 3)\nby Di ptarka Das (IIT Kanpur) as part of LETHEP seminars\n\n\nAbstract\nAbstract : In these lectures we shall discuss universalities in non-equilibrium ph ysics. A primary goal is to understand the late time fate of a closed quan tum system subjected to out of equilibrium dynamics. Typically\, systems e xhibit thermalization\, or at any rate some kind of equilibriation. To und erstand the fate is to identify the final ensemble that describes the syst em at late times. The other closely tied goal is to understand the mechani sm that leads to the equilibriation. The physics becomes more interesting in presence of $\\textit{chaos\, symmetry breakings}$ and $\\textit{critic al points}$. We will touch upon these various issues\, while aiming to get some universal lessons in order to help build non-equilibrium intuition.\ n LOCATION:https://researchseminars.org/talk/lethep/3/ END:VEVENT BEGIN:VEVENT SUMMARY:Diptarka Das (IIT Kanpur) DTSTART:20210604T093000Z DTEND:20210604T110000Z DTSTAMP:20260422T225839Z UID:lethep/4 DESCRIPTION:Title: S ome universal aspects in out-of-equilibrium physics\nby Diptarka Das ( IIT Kanpur) as part of LETHEP seminars\n\nAbstract: TBA\n LOCATION:https://researchseminars.org/talk/lethep/4/ END:VEVENT BEGIN:VEVENT SUMMARY:Lata Joshi (IQOQI Innsbruck) DTSTART:20210611T093000Z DTEND:20210611T110000Z DTSTAMP:20260422T225839Z UID:lethep/5 DESCRIPTION:Title: Q uantum information scrambling\nby Lata Joshi (IQOQI Innsbruck) as part of LETHEP seminars\n\nAbstract: TBA\n LOCATION:https://researchseminars.org/talk/lethep/5/ END:VEVENT BEGIN:VEVENT SUMMARY:Souvik Banerjee (Wurzburg University) DTSTART:20210625T093000Z DTEND:20210625T110000Z DTSTAMP:20260422T225839Z UID:lethep/6 DESCRIPTION:Title: R iding a dark bubble\nby Souvik Banerjee (Wurzburg University) as part of LETHEP seminars\n\nAbstract: TBA\n LOCATION:https://researchseminars.org/talk/lethep/6/ END:VEVENT BEGIN:VEVENT SUMMARY:Chandramouli Chowdhury (ICTS Bengaluru) DTSTART:20210902T093000Z DTEND:20210902T110000Z DTSTAMP:20260422T225839Z UID:lethep/7 DESCRIPTION:Title: I ntroductory Lectures on Asymptotic symmetries-1\nby Chandramouli Chowd hury (ICTS Bengaluru) as part of LETHEP seminars\n\n\nAbstract\nIn these l ectures\, we will look at the subject of asymptotic symmetries and first r eview the subject in the book "Lectures on the Infrared Structure of Gravi ty and Gauge theories"\, by Andrew Strominger. We will first study the Gen eralized Noether Theorem\, which will help us in analyzing the conserved c harges of Gauge Symmetries. We will apply this to QED and Gravity in 4 dim ensions and describe the abelian gauge symmetries in them. During this dis cussion\, we will also introduce the Infrared Triangle and discuss the ide a of memory effect and soft theorem.\n\nHaving reviewed the basics\, we sh all explore the story of Asymptotic symmetries in (even) higher dimensions and discuss the issues one faces while trying to generalize the story in gravity. We will then propose a novel resolution to these issues using som e very simple constructs.\n LOCATION:https://researchseminars.org/talk/lethep/7/ END:VEVENT BEGIN:VEVENT SUMMARY:Chandramouli Chowdhury (ICTS Bengaluru) DTSTART:20210903T093000Z DTEND:20210903T110000Z DTSTAMP:20260422T225839Z UID:lethep/8 DESCRIPTION:Title: I ntroductory Lectures on Asymptotic symmetries-2\nby Chandramouli Chowd hury (ICTS Bengaluru) as part of LETHEP seminars\n\n\nAbstract\nIn these l ectures\, we will look at the subject of asymptotic symmetries and first r eview the subject in the book "Lectures on the Infrared Structure of Gravi ty and Gauge theories"\, by Andrew Strominger. We will first study the Gen eralized Noether Theorem\, which will help us in analyzing the conserved c harges of Gauge Symmetries. We will apply this to QED and Gravity in 4 dim ensions and describe the abelian gauge symmetries in them. During this dis cussion\, we will also introduce the Infrared Triangle and discuss the ide a of memory effect and soft theorem.\n\nHaving reviewed the basics\, we sh all explore the story of Asymptotic symmetries in (even) higher dimensions and discuss the issues one faces while trying to generalize the story in gravity. We will then propose a novel resolution to these issues using som e very simple constructs.\n LOCATION:https://researchseminars.org/talk/lethep/8/ END:VEVENT BEGIN:VEVENT SUMMARY:Siddharth Prabhu (ICTS Bengaluru) DTSTART:20211001T093000Z DTEND:20211001T110000Z DTSTAMP:20260422T225839Z UID:lethep/9 DESCRIPTION:Title: T he holographic nature of quantum information storage in asymptotically fla t spacetimes\nby Siddharth Prabhu (ICTS Bengaluru) as part of LETHEP s eminars\n\n\nAbstract\nKnowledge of all observables on a Cauchy surface en ables us to determine these observables everywhere else in the spacetime. Thus any Cauchy surface can be deemed to be containing all information. He re\, we argue that asymptotically flat spacetimes possess a holographic na ture\, so that all this information is stored just on the boundary of a Ca uchy surface. Allowing for a few reasonable assumptions about the low ener gy structure of any complete theory of quantum gravity enables us to find that an asymptotic observer who resides at the past boundary of future nul l infinity has access to all the information about massless excitations. W e also show that information available in any cut of future null infinity is also available in any later cut\, but the converse doesn't hold. Simila r results hold for past null infinity. We will comment on several interest ing and exciting questions that this line of investigation sheds light on\ , including work in progress.\n LOCATION:https://researchseminars.org/talk/lethep/9/ END:VEVENT END:VCALENDAR