Compatibility of implicit and explicit observers in quantum theory and beyond
APA
Galley, T. (2018). Compatibility of implicit and explicit observers in quantum theory and beyond. Perimeter Institute. https://pirsa.org/18040084
MLA
Galley, Thomas. Compatibility of implicit and explicit observers in quantum theory and beyond. Perimeter Institute, Apr. 02, 2018, https://pirsa.org/18040084
BibTex
@misc{ pirsa_PIRSA:18040084, doi = {10.48660/18040084}, url = {https://pirsa.org/18040084}, author = {Galley, Thomas}, keywords = {}, language = {en}, title = {Compatibility of implicit and explicit observers in quantum theory and beyond}, publisher = {Perimeter Institute}, year = {2018}, month = {apr}, note = {PIRSA:18040084 see, \url{https://pirsa.org}} }
Institute for Quantum Optics and Quantum Information (IQOQI) - Vienna
Collection
Talk Type
Abstract
The observer is implicitly present in the measurement postulates of quantum theory. However the observer can also be modeled as a quantum system interacting with other quantum systems. A theory where every action implicitly undertaken by an agent (such as a measurement or preparation) can be explicitly modeled as non-classical systems interacting is called a universal theory. By modifying the measurement postulates of quantum theory (and preserving the other postulates) we create theories where the observer can still be explicitly modeled as a pure quantum state, but where the implicit observer is different. We argue that any modification of the measurement postulates of quantum theory gives a theory which is not universal. That is to say there are certain actions implicitly carried out by an agent which cannot be explicitly modeled.