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METHOD:PUBLISH
X-WR-CALNAME:Centre for Mathematical Sciences
X-ORIGINAL-URL:http://math-sciences.org
X-WR-CALDESC:Events for Centre for Mathematical Sciences
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TZID:UTC
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TZOFFSETFROM:+0000
TZOFFSETTO:+0000
TZNAME:UTC
DTSTART:20210101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20210203T160000
DTEND;TZID=UTC:20210203T170000
DTSTAMP:20210226T151740
CREATED:20201028T154043Z
LAST-MODIFIED:20210129T185848Z
UID:3941-1612368000-1612371600@math-sciences.org
SUMMARY:Arlene Cristina Aguilar (Campinas)
DESCRIPTION:Infrared gluon dynamics from an ordinary differential equation \nIn this talk\, we present a novel method for computing the nonperturbative kinetic term of the gluon propagator from an exactly solvable ordinary differential equation\, whose origin is the fundamental Slavnov-Taylor identity satisfied by the three-gluon vertex\, evaluated in a particular kinematic limit. The differential equation solution is expressed in terms of a well-known projection of the three-gluon vertex\, simulated on the lattice\, and a specific derivative of the ghost-gluon kernel\, whose approximate form is derived from a standard Schwinger-Dyson equation. In addition\, the physical requirement of a pole-free answer fixes the initial boundary condition. We will show that if one has previous knowledge of the gluon propagator computed from the lattice\, this formalism allows for the extraction of the momentum-dependent effective gluon mass.
URL:http://math-sciences.org/event/arlene-cristina-aguilar-campinas/
LOCATION:Zoom
CATEGORIES:Seminars,Theoretical Physics
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BEGIN:VEVENT
DTSTART;TZID=UTC:20210210T160000
DTEND;TZID=UTC:20210210T170000
DTSTAMP:20210226T151740
CREATED:20210105T115233Z
LAST-MODIFIED:20210205T220453Z
UID:3983-1612972800-1612976400@math-sciences.org
SUMMARY:James Edwards (Michoacan)
DESCRIPTION:Generalised LKF transformations in spinor QED \nWe build upon seminal works by Landau\, Khalatnikov and Fradkin (LKF) that describe the transformation of particle propagators induced by changing the gauge of virtual (loop) photons in quantum electrodynamics. Using the string-inspired first quantised approach to quantum field theory we explain how this can be generalised to uncover the exact\, fully non-perturbative gauge dependence of arbitrary particle correlation functions in scalar and spinor QED for linear covariant gauges. Although these transformations are most naturally expressed in position space\, we shall discuss how they can be passed to momentum space and give some examples of interest to the Schwinger model. Finally\, we will describe how the transformation is realised order by order in the perturbative expansion with a focus on application to the scattering of photons off the particle lines.
URL:http://math-sciences.org/event/james-edwards-michoacan-2/
LOCATION:Zoom
CATEGORIES:Seminars,Theoretical Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20210211T150000
DTEND;TZID=UTC:20210211T160000
DTSTAMP:20210226T151740
CREATED:20210201T131454Z
LAST-MODIFIED:20210201T131454Z
UID:3998-1613055600-1613059200@math-sciences.org
SUMMARY:Prof. Michael Cuntz (Hannover)
DESCRIPTION:
URL:http://math-sciences.org/event/prof-michael-cuntz-hannover/
LOCATION:Zoom
CATEGORIES:Pure Mathematics,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20210217T160000
DTEND;TZID=UTC:20210217T170000
DTSTAMP:20210226T151740
CREATED:20201113T135803Z
LAST-MODIFIED:20201113T135803Z
UID:3950-1613577600-1613581200@math-sciences.org
SUMMARY:Gaurav Sinha Ray (Plymouth)
DESCRIPTION:
URL:http://math-sciences.org/event/gaurav-sinha-ray-plymouth-2/
LOCATION:Zoom
CATEGORIES:Seminars,Theoretical Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20210224T160000
DTEND;TZID=UTC:20210224T170000
DTSTAMP:20210226T151740
CREATED:20201030T184215Z
LAST-MODIFIED:20210218T140544Z
UID:3946-1614182400-1614186000@math-sciences.org
SUMMARY:Linnéa Gräns Samuelsson (Saclay)
DESCRIPTION:Discretizing 2d conformal field theories: the lattice action of the conformal algebra\nConformal field theories (CFTs) are ubiquitous in theoretical physics as fixed points of renormalization\, descriptions of critical systems and more. In these theories the conformal symmetry is a powerful tool in the computation of correlation functions\, especially in 2 dimensions where the conformal algebra is infinite. Discretization of field theories is another powerful tool\, where the theory on the lattice is both mathematically well-defined and easy to put on a computer. In this talk I will outline how these are combined using a discrete version of the 2d conformal algebra that acts in lattice models. I will also discuss recent work on convergence of this discretization\, as well as on applications to non-unitary CFTs that appear in descriptions of problems of interest in condensed matter physics such as polymers\, percolation and disordered systems.
URL:http://math-sciences.org/event/linnea-grans-samuelsson-saclay/
LOCATION:Zoom
CATEGORIES:Seminars,Theoretical Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20210225T150000
DTEND;TZID=UTC:20210225T160000
DTSTAMP:20210226T151740
CREATED:20210201T131712Z
LAST-MODIFIED:20210201T131712Z
UID:4000-1614265200-1614268800@math-sciences.org
SUMMARY:Dr Matthew Pressland (Leeds)
DESCRIPTION:
URL:http://math-sciences.org/event/dr-matthew-pressland-leeds/
LOCATION:Zoom
CATEGORIES:Pure Mathematics,Seminars
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