Undergrad Understanding Landau Levels for 3D Fermionic Gas in Magnetic Field

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SUMMARY

This discussion focuses on the understanding of Landau levels for a 3D fermionic gas in a uniform magnetic field, specifically addressing the challenges in solving the Dirac equation in this context. Key resources mentioned include two research papers from arXiv: 0705.4275 and 1812.08886, as well as the book "Quantum Electrodynamics" by Akhiezer and Berestetskii. Participants express difficulty in comprehending the degeneracy of Landau levels and the associated density of states, highlighting a lack of comprehensive literature on this topic.

PREREQUISITES
  • Understanding of Landau levels in quantum mechanics
  • Familiarity with the Dirac equation
  • Knowledge of fermionic gases and their properties
  • Basic concepts of magnetic fields in quantum systems
NEXT STEPS
  • Research the structure of Landau levels in 3D fermionic systems
  • Study the density of states in magnetic fields
  • Explore the book "Quantum Electrodynamics" by Akhiezer and Berestetskii for foundational concepts
  • Investigate the recent book by Fuxiang Han for additional insights on the topic
USEFUL FOR

This discussion is beneficial for graduate students in physics, researchers studying quantum mechanics, and anyone interested in the behavior of fermionic gases in magnetic fields.

Sunny Singh
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TL;DR
Need an explanation of dimensionality reduction in this case.
I am a beginning graduate student and I've been assigned a paper which uses landau levels for 3d fermionic gas in uniform background magnetic field. I am having trouble finding a proper source which deals with solution of dirac equation in such a case. With the two papers that i have found which talks about it, i am finding it difficult to understand the degeneracy of landau levels and the associated density of states when it comes to finding the integration measure. Can you please suggest me a source, either in a book or any research article which explains landau levels for 3d fermions in detail?
 
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Which two papers have you read? Aren't there references to other papers or even textbooks?
 
vanhees71 said:
Which two papers have you read? Aren't there references to other papers or even textbooks?
This is the first one: https://arxiv.org/abs/0705.4275
and the second one: https://arxiv.org/abs/1812.08886The one book that i found which deals with this problem is: Quantum Electrodynamics by Akhiezer and Berestetskii.

But given that the problem statement seems so simple i thought this must have been dealt with in many more books or papers but even though some books have a paragraph or two on this, none of them discuss the structure of landau levels and density of states in the direction perpendicular to the Pz motion (constant B in z direction) except the book i mentioned above. I was hoping that someone here would have experience with the structure of landau levels in case of 3d fermions since most of landau level stuff online is on electrons confined in 2 dimensions in the context of solid state physics.
 
There's a relatively new book by Fuxiang Han which you can look at amazon.

I bought the problem book, while I needed also to buy the main text.
I am not sure it covers Landau levels of 3d fermions, but you can give it a look if your library has a copy.
 
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MathematicalPhysicist said:
There's a relatively new book by Fuxiang Han which you can look at amazon.

I bought the problem book, while I needed also to buy the main text.
I am not sure it covers Landau levels of 3d fermions, but you can give it a look if your library has a copy.
Thanks, i'll look into it.
 
Time reversal invariant Hamiltonians must satisfy ##[H,\Theta]=0## where ##\Theta## is time reversal operator. However, in some texts (for example see Many-body Quantum Theory in Condensed Matter Physics an introduction, HENRIK BRUUS and KARSTEN FLENSBERG, Corrected version: 14 January 2016, section 7.1.4) the time reversal invariant condition is introduced as ##H=H^*##. How these two conditions are identical?

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