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SUMMARY:Bret Underwood (Pacific Lutheran University)
DTSTART:20201127T140000Z
DTEND:20201127T150000Z
DTSTAMP:20260404T111001Z
UID:QGaSLAB/1
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/QGaSL
 AB/1/">Cosmological Chaos\, Complexity\, and the OTOC</a>\nby Bret Underwo
 od (Pacific Lutheran University) as part of QGaSLAB Seminar Series\n\n\nAb
 stract\nSeveral approaches to investigating quantum chaos have recently em
 erged\, including quantum circuit complexity and the out-of-time-order cor
 relator (OTOC). In this talk\, I will briefly introduce these ideas and ap
 ply them to squeezed states\, including the squeezed state description of 
 cosmological perturbations on a variety of cosmological backgrounds\, such
  as de Sitter accelerated expansion. Some intriguing results from this inv
 estigation include a bound on the growth rate of cosmological complexity r
 eminiscent of a similar bound on the quantum Lyapunov exponent\, and the o
 bservation that among all cosmological backgrounds\, only de Sitter space 
 leads to the exponential growth of the OTOC that is a signature of quantum
  chaos.\n
LOCATION:https://stable.researchseminars.org/talk/QGaSLAB/1/
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BEGIN:VEVENT
SUMMARY:Robert de Mello Koch (South China Normal U. and Witwatersrand U)
DTSTART:20201211T140000Z
DTEND:20201211T150000Z
DTSTAMP:20260404T111001Z
UID:QGaSLAB/2
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/QGaSL
 AB/2/">Scrambling in Yang-Mills</a>\nby Robert de Mello Koch (South China 
 Normal U. and Witwatersrand U) as part of QGaSLAB Seminar Series\n\n\nAbst
 ract\nWe study operators with a bare dimension that grows as N^2 in the la
 rge N limit. These operators are labelled by a Young diagram with p long r
 ows\, as well as a graph\, with p nodes. The dilatation operator describin
 g the mixing of these operators defines a Hamiltonian for excitations hopp
 ing on this graph. The scrambling and equilibration of the resulting dynam
 ics is studied.\n
LOCATION:https://stable.researchseminars.org/talk/QGaSLAB/2/
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BEGIN:VEVENT
SUMMARY:Irvin Martínez (University of Cape Town)
DTSTART:20201204T140000Z
DTEND:20201204T150000Z
DTSTAMP:20260404T111001Z
UID:QGaSLAB/3
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/QGaSL
 AB/3/">Effective Field Theory for Compact Object Evolution in Newtonian No
 n-Relativistic General Relativity</a>\nby Irvin Martínez (University of C
 ape Town) as part of QGaSLAB Seminar Series\n\n\nAbstract\nIn this talk\, 
 we review some of the tools to model compact objects with effective field 
 theory to study their numerical evolution in the late inspiral before merg
 ing or disrupting. We show that by adding Newtonian effects such as spin\,
  tidal and dissipative effects in addition to gravitational wave radiation
 \, the contribution to the phase evolution in the gravitational waveform i
 s significant in order to match the coefficients of the theory from  gravi
 tational wave observations and constrain fundamental physics.\n
LOCATION:https://stable.researchseminars.org/talk/QGaSLAB/3/
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