Rank your QM knowledge according to Pauli’s Exclusion Principle

Pauli’s Exclusion Principle is a paramount concept in Quantum Mechanics which has implications from statistical mechanics to quantum chemistry, consequently, there are many different statements to summarize it depending on the forum. I occasionally joke with my students about how we learnt it in kindergarten an how we state it now at the end of our computational chemistry course.

So, are you a toddler or high up there with W. Pauli predicting the existence of sub-atomic particles at CERN? Which statement of Pauli’s Exclusion Principle sounds more familiar to you?

QM Evolutionary tree!

QM Evolutionary tree!

LOL just feeling a little humorous this morning!


About joaquinbarroso

Computational and theoretical chemist in his early forties, in love with life, science, baseball, and literature. Science literacy makes us responsible citizens, it is therefore a scientific duty to talk, write, and engage with the general public; as Feynman said, if you find science boring, your learning from the wrong teacher. "Make like a molecule and react!"

Posted on February 17, 2015, in Humor, Random thoughts, Theoretical Chemistry and tagged , , , , , , , . Bookmark the permalink. 6 Comments.

  1. Interesting

  2. KANHOUNNON G. Wilfried

    Very good what you are doing indirectly teaching us in theorical chemistry.
    I would like to ask for your on one matter. What will I do to achieve a job which does’nt terminate and gives as instruction:
    Cartesian Forces: Max 0.000565305 RMS 0.000095090
    It is in both Ts and IRC calculations. Thank you a lot for your help.

    • Thank you for your kind words. Have you tried changing the algorithm with which the SCF is being solved? this is always my go-to trick whenever I’m finding convergence problems. Try SCF=QC or XQC and if that doesn’t work try setting a different geometry.

      Hope this helps

  3. KANHOUNNON G. Wilfried

    late is better than never. I would like to express my greatfulness to the helpe you spontanously gave five months ago. thankw a lot.

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