Download presentation

Presentation is loading. Please wait.

Published byAnna Nolan Modified over 4 years ago

1
Q UANTUM M ECHANICS I: I NTERPRETATIONS by Robert Nemiroff Michigan Technological University

2
Physics X: About This Course Pronounced "Fiziks Ecks" Reviews the coolest concepts in physics Being taught for credit at Michigan Tech o Michigan Tech course PH4999 o Aimed at upper level physics majors o Light on math, heavy on concepts o Anyone anywhere is welcome No textbook required o Wikipedia, web links, and lectures only

3
U NCERTAINTY P RINCIPLE : I NTERPRETATIONS I NTERPRETATIONS There are MANY interpretations of quantum mechanics, but only a few will be reviewed here: Copenhagen Interpretation Many Worlds Interpretation Ensemble Interpretation Hidden Variables

4
U NCERTAINTY P RINCIPLE : C OPENHAGEN I NTERPRETATION C OPENHAGEN I NTERPRETATION Most quoted interpretation convention. No single statement defines it. o Defining properties sometimes unclear. Systems described by wave function(s) Wave functions are probabilistic o particles do not have an exact position o uncertainty principle always holds Wave functions "collapse" when an observer makes a measurement

5
U NCERTAINTY P RINCIPLE : M ANY W ORLDS I NTERPRETATION M ANY W ORLDS I NTERPRETATION Every possible quantum measurement outcome occurs o each outcome is realized in a different universe o these universes do not communicate o together, these universes compose a metaverse No observer-triggered wave function collapse o therefore different from the Copenhagen interpretation o incorporates "decoherence" insteaddecoherence

6
U NCERTAINTY P RINCIPLE : E NSEMBLE I NTERPRETATION E NSEMBLE I NTERPRETATION QM wavefunctions only apply to particle ensembles o does not apply to individual particles o each particle in ensemble is "prepared" the same o supported, at times, by Einstein o avoids some single-particle philosophy debates o can attribute probability to classical ignorance, not QM indeterminancy

7
U NCERTAINTY P RINCIPLE : H IDDEN V ARIABLES H IDDEN V ARIABLES Uncertainty caused by untracked complexity Universe classical but influenced by unseen variables o not unlike matter before atoms discovered Once endorsed by Einstein o Origin of "God does not play dice." phrase Fundamentally different than standard QM uncertainty o universe completely deterministic allows a "first mover" type God Might demand faster than light communication Bell realized HV makes different statistical predictions o QM found right, HV wrong by modern tests

Similar presentations

OK

1 MODELING MATTER AT NANOSCALES 4. Introduction to quantum treatments 4.01. Outline of the principles and the method of quantum mechanics.

1 MODELING MATTER AT NANOSCALES 4. Introduction to quantum treatments 4.01. Outline of the principles and the method of quantum mechanics.

© 2018 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google