Sökning: "feynman"

Visar resultat 1 - 5 av 20 avhandlingar innehållade ordet feynman.

  1. 1. Topics in perturbation theory : From IBP identities to integrands

    Författare :Alessandro Georgoudis; Joseph A. Minahan; Tristan McLoughlin; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Perturbation theory; Feynman Integrals; Integrable field theories; Correlation functions.; Theoretical Physics; Teoretisk fysik;

    Sammanfattning : In this thesis we present different topics in perturbation theory. We start by introducing the method of integration by parts identities, which reduces a generic Feynman integral to a linear combination of a finite basis of master integrals. LÄS MER

  3. 2. Asymptotic distribution theory for some test statistics in autoregressive and Galton-Watson processes

    Författare :Rolf Larsson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Feynman-Kac’ formula; Saddlepoint approximation.; matematisk statistik; Mathematical Statistics;

    Sammanfattning : In this thesis, we study asymptotic distributions of some unit root test statistics in autoregressive processes. We then generalize, at first to the situation when the true parameter value is close to one^(thenear integrated case), and secondly to the corresponding test problems in the Galton-Watson process (i.e. LÄS MER

  4. 3. Development and Investigation of Reactivity Measurement Methods in Subcritical Cores

    Författare :Johanna Wright; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; source modulation method; point kinetics; core loading; reactivity measurement; Feynman-alpha formulae; Accelerator Driven Systems ADS ; subcritical cores;

    Sammanfattning : Subcriticality measurements during core loading and in future accelerator driven systems have a clear safety relevance. In this thesis two subcriticality methods are treated: the Feynman-alpha and the source modulation method. LÄS MER

  5. 4. Quantum dynamical effects in complex chemical systems

    Författare :S. Karl-Mikael Svensson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Quantum dynamics; Radiative association; Classical Wigner method; Feynman path integral; Reaction rate constants; Wigner phase space;

    Sammanfattning : When using mathematical models to computationally investigate a chemical system it is important that the methods used are accurate enough to account for the relevant properties of the system and at the same time simple enough to be computationally affordable. This thesis presents research that so far has resulted in three published papers and one unpublished manuscript. LÄS MER

  7. 5. Portfolio Optimization and Statistics in Stochastic Volatility Markets

    Författare :Carl Lindberg; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Stochastic control; portfolio optimization; verification theorem; Feynman-Kac formula; stochastic volatility; non-Gaussian Ornstein-Uhlenbeck process; estimation; number of trades; stochastic volatility;

    Sammanfattning : Large financial portfolios often contain hundreds of stocks. The aim of this thesis is to find explicit optimal trading strategies that can be applied to portfolios of that size for different n-stock extensions of the model by Barndorff-Nielsen and Shephard [3]. LÄS MER