Video URL
https://pirsa.org/15050015Quantum phenomena modelled by interactions between many classical worlds
APA
Deckert, D. (2015). Quantum phenomena modelled by interactions between many classical worlds. Perimeter Institute for Theoretical Physics. https://pirsa.org/15050015
MLA
Deckert, Dirk-André. Quantum phenomena modelled by interactions between many classical worlds. Perimeter Institute for Theoretical Physics, May. 13, 2015, https://pirsa.org/15050015
BibTex
@misc{ scivideos_PIRSA:15050015, doi = {10.48660/15050015}, url = {https://pirsa.org/15050015}, author = {Deckert, Dirk-Andr{\'e}}, keywords = {Quantum Foundations}, language = {en}, title = {Quantum phenomena modelled by interactions between many classical worlds}, publisher = {Perimeter Institute for Theoretical Physics}, year = {2015}, month = {may}, note = {PIRSA:15050015 see, \url{https://scivideos.org/index.php/pirsa/15050015}} }
Dirk-André Deckert Ludwig-Maximilians-Universitiät München (LMU)
Abstract
One necessity to avoid the measurement problem in quantum mechanics is a clear ontology. Such an ontology is for instance provided by Bohmian mechanics. In the non-relativistic regime, Bohmian mechanics is a theory about particles whose motion is governed by a velocity field. The latter is generated by a wave
function solving the Schrödinger equation. In view of Feynman's criticism towards classical field theory one may wonder whether such a complex object as the wave function is needed to account for quantum phenomena. After all the value of the velocity field, i.e., of the wave function, is only needed in the vicinity of the configuration of the particle positions, however, it is defined everywhere in configuration space, even in places where the configuration might never roam. In a joint work with M. Hall and H. Wiseman we were able to formulate an approach to quantum mechanics that is capable to describe typical quantum phenomena like interference without a wave function, having only particles. This approach comes at the cost of introducing many classical worlds, hence the name Many-Interacting-Worlds approach (MIW). In MIW the force on each particle is given by 1) Newton's force describing the interaction within each world and 2) an additional force term describing an interaction between the worlds. Similar approaches have been suggested by B. Poirier and C. Sebens. I will give an overview on MIW, discuss the nature of its equations of motion, and its empirical import.