# Physical implications of a fundamental period of time

### APA

Bojowald, M. (2021). Physical implications of a fundamental period of time . Perimeter Institute. https://pirsa.org/21010010

### MLA

Bojowald, Martin. Physical implications of a fundamental period of time . Perimeter Institute, Jan. 14, 2021, https://pirsa.org/21010010

### BibTex

@misc{ pirsa_PIRSA:21010010, doi = {10.48660/21010010}, url = {https://pirsa.org/21010010}, author = {Bojowald, Martin}, keywords = {Quantum Gravity}, language = {en}, title = {Physical implications of a fundamental period of time }, publisher = {Perimeter Institute}, year = {2021}, month = {jan}, note = {PIRSA:21010010 see, \url{https://pirsa.org}} }

Martin Bojowald Pennsylvania State University

## Abstract

If time is described by a fundamental process rather than a coordinate, it

interacts with any physical system that evolves in time. The resulting

dynamics has recently been shown to be consistent provided the fundamental

period of the time system is sufficiently small. A strong upper bound T_C

< 10^{-33}s of the fundamental period of time, several orders of magnitude

below any direct time measurement, can be obtained from bounds on

dynamical variations of the period of a lab system evolving in time.

Possible cosmological implications will be discussed.