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!

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About joaquinbarroso

Theoretical chemist in his late thirties, in love with life and deeply in love with his woman and children. I love science, baseball, literature, movies (perhaps even in that order). I'm passionate about food and lately wines have become a major hobby. In a nutshell I'm filled with regrets but also with hope, and that is called "living".

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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