Abstract
One dimensional problems illustrate in simple fashion many aspects of the theory, and for this reason, every beginner in Quantum Mechanics is traditionally exposed to them. Some interesting one-particle problems in higher dimensions can be solved by separation of variables, thereby reducing them to 1d subproblems, and we shall encounter several examples in other chapters. However, in recent times there have been important technological developments in nano-devices and low-dimensional objects (like nano-wires and nano-tubes) that have made these problems much more directly relevant. In classical physics, a wire is one-dimensional in the limited sense that its length is many times its diameter. However, in Quantum Mechanics, the low dimensionality of thin films and 1d objects has a much stronger meaning. The next problem (deep potential well) shows that the confinement implies quantized levels divided by gaps that become wider the narrower the well. This implies that at low enough temperatures, the electrons behave as if the transverse dimensions were effectively frozen out. In this way, low d problems are no longer academic.
Simple cases trigger Intuition.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Notes
- 1.
There is indeed a variety of interesting problems with V, which is periodic (electrons in perfect crystals), aperiodic (e.g. electrons in glasses): here, I consider only the simplest examples.
- 2.
Gabriel Cramer (Geneve 1704–Bagnols sur Céze (France) 1752).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Copyright information
© 2018 Springer International Publishing AG, part of Springer Nature
About this chapter
Cite this chapter
Cini, M. (2018). Particle in One Dimension. In: Elements of Classical and Quantum Physics. UNITEXT for Physics. Springer, Cham. https://doi.org/10.1007/978-3-319-71330-4_11
Download citation
DOI: https://doi.org/10.1007/978-3-319-71330-4_11
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-71329-8
Online ISBN: 978-3-319-71330-4
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)