Speaker: Filippo Fecit, PhD student at Bologna university. You can find an abstract here below.
Abstract: I will show how the Worldline Formalism can be adapted to explore non-perturbative phenomena that originate from the interaction of quantum fields with classical backgrounds. As a functional approach, it naturally lends itself to non-perturbative analyses, where obtaining suitably resummed expressions for effective actions and heat kernels plays a crucial role. Focusing on the specific case of a quantum scalar field coupled to a Yukawa background, I will present a systematic resummation of all the invariants constructed from powers, first derivatives, and second derivatives of the background field. These results allow for the computation of vacuum instability by evaluating the vacuum persistence amplitude and the associated Schwinger pair production probability. Furthermore, I will illustrate how the presence of an additional, rapidly varying background can significantly enhance pair production.
Location:
You can also (passcode: 060379).
The event is open to all.
Abstract: I will show how the Worldline Formalism can be adapted to explore non-perturbative phenomena that originate from the interaction of quantum fields with classical backgrounds. As a functional approach, it naturally lends itself to non-perturbative analyses, where obtaining suitably resummed expressions for effective actions and heat kernels plays a crucial role. Focusing on the specific case of a quantum scalar field coupled to a Yukawa background, I will present a systematic resummation of all the invariants constructed from powers, first derivatives, and second derivatives of the background field. These results allow for the computation of vacuum instability by evaluating the vacuum persistence amplitude and the associated Schwinger pair production probability. Furthermore, I will illustrate how the presence of an additional, rapidly varying background can significantly enhance pair production.
Location:
You can also (passcode: 060379).
The event is open to all.
- Organizer: Quantum Field Theory Center
- Address:
- Contact Email: damiapaciarinim@imada.sdu.dk
- Add to your calendar: