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SUMMARY:Bret Underwood (Pacific Lutheran University)
DTSTART:20201127T140000Z
DTEND:20201127T150000Z
DTSTAMP:20260422T225724Z
UID:QGaSLAB/1
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/QGaSLAB/1/">
 Cosmological Chaos\, Complexity\, and the OTOC</a>\nby Bret Underwood (Pac
 ific Lutheran University) as part of QGaSLAB Seminar Series\n\n\nAbstract\
 nSeveral approaches to investigating quantum chaos have recently emerged\,
  including quantum circuit complexity and the out-of-time-order correlator
  (OTOC). In this talk\, I will briefly introduce these ideas and apply the
 m to squeezed states\, including the squeezed state description of cosmolo
 gical perturbations on a variety of cosmological backgrounds\, such as de 
 Sitter accelerated expansion. Some intriguing results from this investigat
 ion include a bound on the growth rate of cosmological complexity reminisc
 ent of a similar bound on the quantum Lyapunov exponent\, and the observat
 ion that among all cosmological backgrounds\, only de Sitter space leads t
 o the exponential growth of the OTOC that is a signature of quantum chaos.
 \n
LOCATION:https://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:20260422T225724Z
UID:QGaSLAB/2
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/QGaSLAB/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\nAbstract\nW
 e study operators with a bare dimension that grows as N^2 in the large N l
 imit. These operators are labelled by a Young diagram with p long rows\, a
 s well as a graph\, with p nodes. The dilatation operator describing the m
 ixing of these operators defines a Hamiltonian for excitations hopping on 
 this graph. The scrambling and equilibration of the resulting dynamics is 
 studied.\n
LOCATION:https://researchseminars.org/talk/QGaSLAB/2/
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SUMMARY:Irvin Martínez (University of Cape Town)
DTSTART:20201204T140000Z
DTEND:20201204T150000Z
DTSTAMP:20260422T225724Z
UID:QGaSLAB/3
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/QGaSLAB/3/">
 Effective Field Theory for Compact Object Evolution in Newtonian Non-Relat
 ivistic General Relativity</a>\nby Irvin Martínez (University of Cape Tow
 n) as part of QGaSLAB Seminar Series\n\n\nAbstract\nIn this talk\, we revi
 ew some of the tools to model compact objects with effective field theory 
 to study their numerical evolution in the late inspiral before merging 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 is signi
 ficant in order to match the coefficients of the theory from  gravitationa
 l wave observations and constrain fundamental physics.\n
LOCATION:https://researchseminars.org/talk/QGaSLAB/3/
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