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    Is there a better name for "citizen science"?

    The term Citizen Science has, at least according to wikipedia, existed for at least several decades. Is it time to come up with a hip new 21st century moniker? Or are we happy with "Citizen Science" as it is?
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    Quasi-particles: how typical are they?

    It seems fascinating to me that quasi-particles appear everywhere, and can appear at multiple scales within the same system. Why is this? Is there a good intuitive reason for why entities behaving like free particles should exist at various scales in a system that is otherwise strongly...
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    Lie algebras contained in Universal Enveloping Algebra

    I've got a general question about Lie algebras, which is basically this: Q: What is there to be said about the Lie algebras that can be identified in the universal enveloping algebra of a particular Lie algebra? E.g. if I have a Lie algebra of the form [A,B] = ηB, then I would like to...
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    Applications of Topology in Physics

    Hello, I'm a physics undergrad who knows a little bit about topology (some point set, homotopy theory, and covering spaces), and I was wondering if people could describe some instances in which topology is useful for studying phenomena in physics (such as in condensed matter theory, or in...
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    Question on perturbation theory

    Hey everyone, I'm studying quantum mechanics from Griffiths (Introduction to Quantum Mechanics, 2nd edition), and I'm puzzling over his derivation of the nth order corrections to the energies and corresponding eigenstates for a perturbed Hamiltonian. The steps that are outlined in Griffiths...
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    Description of Wave Function Collapse

    Hello, I'm new to Physics Forums, so I apologize if this question seems somewhat uninformed, but I have recently started studying quantum mechanics, and was curious about the idea of the wave function collapse, and how, from what I can tell, it seems to be approached completely independently...