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Phonons and Forces: Momentum versus Pseudomomentum in Moving Fluids | | Michael Stone
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17 Dec 2000 | | Subject: | Condensed Matter; Fluid Dynamics | cond-mat gr-qc physics.flu-dyn | | Abstract: | I provide a pedagogical introduction to the notion of pseudomomentum for waves in a medium, and show how changes in pseudomomentum may sometimes be used to compute real forces. I then explain how these ideas apply to sound waves in a fluid. When the background fluid is in motion, the conservation laws for pseudomomentum and pseudoenergy are most easily obtained by exploiting the acoustic metric and the formalism of general relativity. | | Source: | arXiv, cond-mat/0012316 | | Services: | Forum | Review | PDF | Favorites | |
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