731 citations · 3.1k across the 79 of their papers we have counts for
80 papers
Computing real-time quantum path integrals on Sewed, almost-Lefschetz thimbles
Zong-Gang Mou, Paul M. Saffin, Anders Tranberg
We present a method to compute real-time path integrals numerically, by Monte-Carlo sampling on near-Lefschetz thimbles. We present a collection of tools based on the Lefschetz thi…
Quantum corrected Q-ball dynamics
Qi-Xin Xie, Paul M. Saffin, Anders Tranberg +1
The physics of individual Q-balls and interactions between multiple Q-balls are well-studied in classical numerical simulations. Interesting properties and phenomena have been disc…
Quantum tachyonic preheating, revisited
Anders Tranberg, Gerhard Ungersbäck
In certain models of inflation, the postinflationary reheating of the Universe is not primarily due to perturbative decay of the inflaton field into particles, but proceeds through…
Bubble nucleation and quantum initial conditions in classical statistical simulations
Anders Tranberg, Gerhard Ungersbäck
Classical-statistical lattice simulations provide a useful approximation to out-of-equilibrium quantum field theory, but only for systems exhibiting large occupation numbers, and o…
Optimisation of Thimble Simulations and Quantum Dynamics of Multiple Fields in Real Time
Simon Woodward, Paul M. Saffin, Zong-Gang Mou +1
We apply the Generalised Thimble approach to the computation of exact path integrals and correlators in real-time quantum field theory. We first investigate the details of the nume…
Stochastic inflation from quantum field theory and the parametric dependence of the effective noise amplitude
Jens O. Andersen, Magdalena Eriksson, Anders Tranberg
The non-linear dynamics of long-wavelength cosmological fluctuations may be phrased in terms of an effective classical, but stochastic evolution equation. The stochastic noise repr…