Students' Understanding of Stern Gerlach Experiment

TL;DR

This paper investigates students' difficulties with the Stern Gerlach experiment and evaluates the effectiveness of a Quantum Interactive Learning Tutorial in enhancing their understanding of quantum spin concepts.

Contribution

It provides insights into student misconceptions and demonstrates the potential of QuILT to improve comprehension of the Stern Gerlach experiment in quantum mechanics.

Findings

Students have significant misconceptions about spin and measurement.

The QuILT shows promise in improving student understanding.

Preliminary data suggest increased conceptual grasp after using QuILT.

Abstract

The Stern Gerlach experiment has played a central role in the discovery of spin angular momentum and it has also played a pivotal role in elucidating foundational issues in quantum mechanics. Here, we discuss investigation of students' difficulties related to the Stern Gerlach experiment by giving written tests and interviewing advanced undergraduate and graduate students in quantum mechanics. We also discuss preliminary data that suggest that the Quantum Interactive Learning Tutorial (QuILT) related to the Stern Gerlach experiment is helpful in improving students' understanding of these concepts.