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Unformatted text preview: MIT OpenCourseWare http://ocw.mit.edu 8.044 Statistical Physics I Spring 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms . 8.044 L13B1 1. The System Fixed: E V N M or H P or E E < energy < E+ << E A complete set of independent thermodynamic variables is fixed. Many micro-states satisfy the conditions. 2. Probability Density All accessible microscopic states are equally probable. Classical p ( { p, q } ) = 1 / E < H ( { p, q } ) E + = 0 elsewhere accessible { dp, dq } = ( E, V, N ) 8.044 L13B2 Quantum p ( k ) = 1 / E < k |H| k E + = 0 elsewhere (1) = ( E, V, N ) k, accessible 8.044 L13B3 = Let X be a state of the system specified by a subset { p,q } of { p,q } p ( X ) = except { p ,q } p ( { p, q } ) { dp, dq } 1 except { p ,q } { dp, dq } (consistent with X ) = volume consistent with X = total volume of accessible phase space 8.044 L13B4 3. Quantities Related to 3....
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This note was uploaded on 11/08/2011 for the course PHYSICS 8.004 taught by Professor Staff during the Spring '08 term at MIT.

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lec13 - MIT OpenCourseWare http://ocw.mit.edu 8.044...

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