# The time traveller's guide to quantum field theory

### APA

Alonso Serrano, A. (2022). The time traveller's guide to quantum field theory. Perimeter Institute. https://pirsa.org/22030102

### MLA

Alonso Serrano, Ana. The time traveller's guide to quantum field theory. Perimeter Institute, Mar. 10, 2022, https://pirsa.org/22030102

### BibTex

@misc{ pirsa_22030102, doi = {10.48660/22030102}, url = {https://pirsa.org/22030102}, author = {Alonso Serrano, Ana}, keywords = {Quantum Gravity}, language = {en}, title = {The time traveller{\textquoteright}s guide to quantum field theory}, publisher = {Perimeter Institute}, year = {2022}, month = {mar}, note = {PIRSA:22030102 see, \url{https://pirsa.org}} }

Ana Alonso Serrano Max Planck Institute for Gravitational Physics (Albert Einstein Institute)

## Abstract

In this talk, I will explain the construction of a (1+1) spacetime with a wormhole and its conversion into a time-machine spacetime. Then, I will describe a massless scalar quantum field theory in such spacetime. I focus in comparing this quantization of the field in the time-machine spacetime with the quantization on the two-dimensional Einstein cylinder, the emergence of a zero mode and its regularization.

Zoom link: https://pitp.zoom.us/j/94856731951?pwd=MnFNZjlkUHVVWkRRQTIxR0o0TDFnUT09