# Matter-Gravity Entanglement in Quantum Gravity

### APA

Husain, V. (2019). Matter-Gravity Entanglement in Quantum Gravity . Perimeter Institute. https://pirsa.org/19030000

### MLA

Husain, Viqar. Matter-Gravity Entanglement in Quantum Gravity . Perimeter Institute, Mar. 07, 2019, https://pirsa.org/19030000

### BibTex

@misc{ pirsa_19030000, doi = {10.48660/19030000}, url = {https://pirsa.org/19030000}, author = {Husain, Viqar}, keywords = {Quantum Gravity}, language = {en}, title = {Matter-Gravity Entanglement in Quantum Gravity }, publisher = {Perimeter Institute}, year = {2019}, month = {mar}, note = {PIRSA:19030000 see, \url{https://pirsa.org}} }

Viqar Husain University of New Brunswick

## Abstract

Quantum gravity may be viewed as a bipartite matter-geometry system. Evolution of matter-geometry entanglement entropy is an interesting question for issues such as the emergence of QFT on curved spacetime from quantum gravity: emergence would require initial states to evolve to product states. We study this question in a cosmological model. We give numerical evidence that matter-geometry entanglement entropy increases indefinitely (with respect to a relational time) for apparently arbitrary initial states. This result raises the question of whether matter and geometry remain entangled in a large Universe.