2 citations · 2 across the 5 of their papers we have counts for
5 papers · 1 filter
On quantum tunnelling in the presence of Noether charges
Giulio Barni, Thomas Steingasser
We provide a complete first-principles based discussion of quantum tunnelling out of initial states carrying a conserved Noether charge. Our main result is a simple, unambiguous Eu…
Quantum tunneling from excited states in the steadyon picture
Joshua Lin, Bruno Scheihing-Hitschfeld, Thomas Steingasser
Recent developments in the understanding of real-time path integrals led to the development of the ``steadyon picture'' for the semi-classical calculation of quantum tunneling rate…
Path integral predictions for pre-asymptotic false vacuum decay
Joshua Lin, Bruno Scheihing-Hitschfeld, Thomas Steingasser
When tunneling occurs out of generic initial states, a significant fraction of probability is lost at early times during which the dynamics is governed by excited resonance states.…
Toward quantum tunneling from excited states: Recovering imaginary-time instantons from a real-time analysis
Thomas Steingasser, David I. Kaiser
We revisit the path integral description of quantum tunneling and lay the groundwork for its generalization to excites states through real-time path integral techniques. For clarit…
Finite-Temperature Instantons from First Principles
Thomas Steingasser, Morgane König, David I. Kaiser
We derive the finite-temperature quantum-tunneling rate from first principles. The rate depends on both real- and imaginary-time; we demonstrate that the relevant instantons should…