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X-WR-CALNAME:Centre for Mathematical Sciences
X-ORIGINAL-URL:https://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
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DTSTART:20210101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20210428T160000
DTEND;TZID=UTC:20210428T170000
DTSTAMP:20210512T040227
CREATED:20210311T181700Z
LAST-MODIFIED:20210416T113415Z
UID:4024-1619625600-1619629200@math-sciences.org
SUMMARY:Dimitrios Bachtis (Swansea)
DESCRIPTION:Quantum field-theoretic machine learning \nThe precise equivalence between discretized Euclidean field theories and Markov random fields\, as established by the Hammersley-Clifford theorem\, opens up the opportunity to investigate machine learning from the perspective of quantum field theory. In this talk I will discuss a variety of interconnected topics: Markov properties for quantum fields\, the derivation of machine learning algorithms and of neural networks from the $\phi^{4}$ scalar field theory and the minimization of distance metrics between probability distributions. I will then conclude by presenting applications pertinent to the quantum field-theoretic machine learning algorithms.
URL:https://math-sciences.org/event/dimitrios-bachtis-swansea/
LOCATION:Zoom
CATEGORIES:Seminars,Theoretical Physics
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BEGIN:VEVENT
DTSTART;TZID=UTC:20210505T160000
DTEND;TZID=UTC:20210505T170000
DTSTAMP:20210512T040227
CREATED:20210327T075658Z
LAST-MODIFIED:20210423T131852Z
UID:4032-1620230400-1620234000@math-sciences.org
SUMMARY:Paolo Solinas (Genoa)
DESCRIPTION:Schwinger effect in superconductors \nFrom the sixties a deep connection has followed the development of superconductivity and quantum field theory. The Anderson-Higgs mechanism and the similarities between the Dirac and Bogoliubov-de Gennes equations are the most intriguing examples. In this last analogy\, the massive Dirac particle is identified with a quasiparticle excitation and the fermion mass energy with the superconducting gap energy. I will show that\, following this parallelism\, it is possible to predict a new phenomenon: the superconducting Schwinger effect. As in the quantum electrodynamics Schwinger effect\, where an electron-positron couple is created from the vacuum by an intense electric field\, an electrostatic field can generate two coherent excitations from the superconducting ground-state condensate. These excitations are crucially different from the ones usually observed in superconductors and should lead to the weakening of the superconductivity.\nI will discuss the connection with recent experiments and future developments inspired by the original Schwinger paper.
URL:https://math-sciences.org/event/paolo-solinas-genoa/
LOCATION:Zoom
CATEGORIES:Seminars,Theoretical Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20210512T160000
DTEND;TZID=UTC:20210512T170000
DTSTAMP:20210512T040227
CREATED:20201112T120032Z
LAST-MODIFIED:20210507T125026Z
UID:3948-1620835200-1620838800@math-sciences.org
SUMMARY:Bipasha Chakraborty (DAMTP)
DESCRIPTION:“Digital Quantum Simulation of the Schwinger Model with Topological Term \nIn this talk\, I would present our recent work (arXiv:2001.00485) on digital quantum simulation of 1+1 dimensional quantum electrodynamics (Schwinger model) with the topological term\, using adiabatic state preparation. This\, in turn\, allows us to compute an expectation value of the fermion mass operator with respect to the vacuum. We estimate computational costs required to take reasonable continuum and thermodynamic limits. Our results imply that digital quantum simulation is already useful tool to explore non-perturbative aspects of gauge theories with real time and topological terms.
URL:https://math-sciences.org/event/bipasha-chakraborty-damtp/
LOCATION:Zoom
CATEGORIES:Seminars,Theoretical Physics
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20210526T160000
DTEND;TZID=UTC:20210526T170000
DTSTAMP:20210512T040227
CREATED:20210422T224317Z
LAST-MODIFIED:20210422T224317Z
UID:4057-1622044800-1622048400@math-sciences.org
SUMMARY:Eike Müller (Bath)
DESCRIPTION:
URL:https://math-sciences.org/event/eike-muller-bath/
LOCATION:Zoom
CATEGORIES:Seminars,Theoretical Physics
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