# Does quantum gravity give rise to an observable nonlocality?

### APA

Sorkin, R. (2007). Does quantum gravity give rise to an observable nonlocality?. Perimeter Institute. https://pirsa.org/07010001

### MLA

Sorkin, Rafael. Does quantum gravity give rise to an observable nonlocality?. Perimeter Institute, Jan. 17, 2007, https://pirsa.org/07010001

### BibTex

@misc{ pirsa_PIRSA:07010001, doi = {10.48660/07010001}, url = {https://pirsa.org/07010001}, author = {Sorkin, Rafael}, keywords = {Quantum Foundations}, language = {en}, title = {Does quantum gravity give rise to an observable nonlocality?}, publisher = {Perimeter Institute}, year = {2007}, month = {jan}, note = {PIRSA:07010001 see, \url{https://pirsa.org}} }

Perimeter Institute for Theoretical Physics

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Abstract

If spacetime is "quantized" (discrete), then any equation of motion compatible with the Lorentz transformations is necessarily non-local. I will present evidence that this sort of nonlocality survives on length scales much greater than Planckian, yielding for example a nonlocal effective wave-equation for a scalar field propagating on an underlying causal set. Nonlocality of our effective field theories may thus provide a characteristic signature of quantum gravity.