Pauli Definition and 229 Threads

Pauli is a surname and also a Finnish male given name (variant of Paul) and may refer to:

Arthur Pauli (born 1989), Austrian ski jumper
Barbara Pauli (1752 or 1753 - fl. 1781), Swedish fashion trader
Gabriele Pauli (born 1957), German politician
Hans Pauli (fl. 1570), Swedish monk and alleged sorcerer
Hansjörg Pauli (1931–2007), Swiss musicologist, writer, and music critic
Johannes Pauli (c. 1455 – after 1530), German Franciscan writer
Pauli Pauli (born 1994), Australian Rugby league player
Reinhold Pauli (1823–1882), German historian
Wolfgang Pauli (1900–1958), Austrian theoretical physicist
Pauli Murray (1910–1985), American academic and author
Dr. Pauli, a nemesis in Captain Video and His Video Rangers

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  1. R

    Pauli Exclusion Principle-question

    Pauli Exclusion Principle--question According to the Pauli Exclusion Principle, two identical FERMIONS cannot coexist in the same energy level within a nucleus. My question is, could two identical fermions coexist if they had opposite isospin, that is, does isospin make the two otherwise...
  2. R

    Understanding the Pauli Exclusion Principle and Its Consequences in an Atom

    hey all, posted this before but no one managed to get it? question off a past paper that it can't do.../ state pauli exclusion principle (can do that) and explain its consequence in an atom (can do that). Use it to determine the values of n, l ml and ms of 10 neon atoms placed in a box at...
  3. J

    Does the Pauli Exclusion Principle Imply Orthogonality of Quantum States?

    Usual way of expressing pauli exclusion principle is, that the two identical fermions must be on different states. This seems a confusing statement, since the meaning of the term "different states" isn't very clear. Suppose I have two electrons, otherwise in the same states, but other one being...
  4. I

    Proof of Dot and Cross Product of Arbitrary Vectors with Pauli Spin Operator

    I need to show: (\mathbf{\sigma} \cdot \mathbf{a})(\mathbf{\sigma} \cdot \mathbf{b})=\mathbf{a} \cdot \mathbf{b} I + i \mathbf{\sigma} \cdot (\mathbf{a} \times \mathbf{b}) where a and b are arbitrary vectors, sigma is the pauli spin operator. I was just wondering what the dot product...
  5. CarlB

    What is Tripled Pauli Statistics in Black Hole Quantum Mechanics?

    Back in 2002, Lubos Motl wrote a paper on Title: An analytical computation of asymptotic Schwarzschild quasinormal frequencies Lubos Motl, Adv.Theor.Math.Phys. 6 (2003) 1135-1162 Recently it has been proposed that a strange logarithmic expression for the so-called Barbero-Immirzi parameter...
  6. I

    Is There a Mistake in My Proof for the Identity of Pauli Spin Matrices?

    Homework Statement prove the idendity \sigma \times \sigma =i \sigma where \sigma is Pauli Spin matrices Homework Equations The Attempt at a Solution This is how I did..and I am getting 2 i \sigma instead of i\sigma ...
  7. A

    Basic question about Pauli Rotations

    So it's apparently possible to prove that e^{-iAx} = cos(x)I + isin(x)A given that A^2=I. What I don't understand is how this is supposed to be derived. Any help would be appreciated as this is driving me nuts and this is probably something that is very easy to prove...
  8. T

    Pauli Principle: Exploring Its Deeper Basis & Photon Emission

    I only have applied courses of quantum physics, so in my textbook fundamentals are only briefly mentioned. In my textbook the following is said of the Pauli principle: I was wondering if someone can tip the veil of these arguments a little bit. Obviously, spin has a lot to do with it. I...
  9. W

    How Do Pauli Matrices Relate to Rotation in Quantum Mechanics?

    I am given the formula (valid for any a) A ( \vec{ \sigma } \cdot \vec{a} ) A^{-1} = \vec{ \sigma } \cdot R_A \vec{a} with [itex]A=exp(i \phi \cdot \vec{\sigma} /2) = exp(i \phi \vec{\sigma} \cdot \hat{n} /2)[/tex] R_A the rotation matrix and sigma the Pauli matrices. And am supposed to...
  10. P

    Download Pauli and Fierz 1939 Paper in PDF or PS Format

    I'm looking for this paper in PDF or PS typefile: "W.Pauli and M. Fierz, Proc. Roy. Soc. (London) A73, 211 (1939)" It's very hard to find it from my place, so i'll be happy if somebody can post it or send it to me. Thanks, bye rrrr
  11. S

    Does the Pauli Exclusion Principle Apply to Electrons in Metals?

    Hello, I was wondering if the Pauli Exclusion principle still applies to electrons in a metal. My intitution tells me no since a magnetic field acting on a metal causes the electron spin to realign but I am not sure. Thanks, -scott
  12. A

    Does the Pauli Exclusion Principle Span Distance?

    sometimes i think, would the pauli exclusion principle still apply if the fermions span a very large spatial distance? for example if i have a very very loooong chain of condensed electrons, wouldn't it be possible that the electrons at both ends occasionaly occupy the same quantum state?
  13. M

    Pauli Matrices: Troubleshooting a Non-Zero Commutator

    Ok, I have a stupid question on pauli matrices here but it is bugging me. In a book I'm reading it gives the equation [\sigma_i , \sigma_j] = 2 I \epsilon_{i,j,k} \sigma_k , I understand how it works and everything but I do have a question, when you have k=i/j and i!=j (like 2,1,2) you get a...
  14. A

    Pauli exclusion principle, fermions, bosons

    Hi, I am having trouble understanding these concepts. I checked out some websites but it still doesn't help. First of all what's the main postulate? That there exist 2 different kind of particles: bosons and fermions? What are their fundamental definitions which lead to the fact that an integer...
  15. arivero

    Pauli to Sommerfeld on Discrete Derivative

    Resders of the forum could enjoy this pdf http://documents.cern.ch//archive/electronic/other/pauli_vol3//sommerfeld_0463-2.pdf from http://doc.cern.ch/cgi-bin/setlink?base=pauli&categ=&id=sommerfeld_0463-2 In page 3 of the letter (1 of the transcripcion) you can read Pauli sentence of the...
  16. S

    How Does the Pauli Exclusion Principle Influence Electron Pairing in Orbitals?

    I was wondering why electrons exsist in pairs in orbitals? Is it that since they both have opposite spins according to the Pauli Exclusion Priciple that they cancel each other out and create a more stable system? Thanks, -Scott
  17. U

    Super fluids and pauli exclusion principle

    I don't understand how can atoms like heilium-4 which has same amounts of fermions behave like bosons and do not obey pauli's exclusion principle. Do the heilium physically stack up together like laser light, or does it just seem to do that? could someone please explain how superfluids work.
  18. fargoth

    A neutron star collapses - where's pauli?

    neutrons are fermions, with half spin, as such the must not occupy the same quantum state (meaning the wave functions can't overlap - atleast not with a big probability density portion of each other). so, if neutron star is in the most dense state it can get, meaning its degenerate and every...
  19. C

    The Pauli exclusion principle catastrophe.

    The "Pauli exclusion principle" catastrophe. :!) Recent works with MOTTS have proved the inability of Pauli's work to account for experimental results on the field of high-temp superconductors. Could anyone add his or her own opinion about this? By the way, have any of you guys received...
  20. Q

    Can Quaternion and Pauli Matrix algebra be linked in EM course?

    i am learning Quaternion now for my EM course. Can someone enlighten me on the correspondence between Quaternion and Pauli Matrix algebra?
  21. K

    Does the Pauli Exclusion Principle Apply to All Types of Particles and Atoms?

    Does it include all types of particles? All atoms? Thank you.
  22. I

    Pauli Exclusion Principle, what does it say?

    I know I already posted this question, but it seems to have gotten "lost" among the other questions in the same thread. This is really confusing me now, so I'll ask it again. The pauli exclusion principle says that no two fermions can be in the same quantum state. But if we have three...
  23. S

    Pauli exclusion principle - does it apply to everything

    The Pauli exclusion principle states that no two fermions can have the same quantum state. My question is, if you could conceivable solve the wave equation for every electron in a large body, perhaps even the entire universe, does this mean that no electrons in that body can have exactly the...
  24. N

    How should we recognize antisimmetric and Pauli rules in

    :cry: We found that "tidy function" exists, when wave function intepreted as fi=X(1)X(2)alfa(1)beta(2) for two electrons is antisymetric and fill Pauli rule. But we were unable to find an simple explanation for it. And believe us, none book was able to "show us the door". Thanks for any...
  25. S

    How Did the Pauli Exclusion Principle Originate: Assumption or Observation?

    I had a question about the pauli principle. Well, I know that it classify the particles into two groups named bosons and fermions and says that they have symmetrical or antisymetrical wave functions. My question is this: How did he say these? I mean, was it assumption that came true or just a...
  26. R

    What is the derivation of the Pauli Exclusion Principle?

    I just finished a unit in statistical mechanics, and i have done some second year quantum mechanics and particle physics at university, however we have only been given the Pauli Exclusion principle and told that fermions obey it, but that bosons do not. My question is, does the Exclusion...
  27. P

    Finding Pauli matrices WITHOUT ladder operators

    Does anyone know of an alternative way of calculating the Pauli spin matrices \mbox{ \sigma_x} and \mbox{ \sigma_y} (already knowing \mbox { \sigma_z} and the (anti)-commutation relations), without using ladder operators \mbox{ \sigma_+} and \mbox{ \sigma_- }? Thanks!
  28. R

    Exploring the Possible Mechanisms Behind the Pauli Exclusion Principle

    Could the Pauli exclusion principle be due to a force that has a 1 / r dependency where r is the distance between two electrons. Then in the case of electron degeneracy pressure in neutron stars could we say that uncertainty in momentum x uncertainty in position arises from a repulsive...
  29. C

    Pauli Matrices and orthogonal projections

    Ok, I'm working with the Pauli Matrices, and I've already gone through showing a few bits of information. I've got a good idea how to keep going, but I'm not exactly sure about this one-- say M= 1/2(alphaI + a*sigma) where alpha E C, a=(ax, ay, az) a complex vector, a*sigma=ax sigmax+ay...
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