Finite temperature dynamic structure function of the free Bose gas
نویسنده
چکیده
A detailed calculation of the finite temperature dynamic structure function of the free Bose gas is presented and discussed. After a short derivation of the expressions describing the exact response S(q,ω;T ) and the impulse approximation (IA) SIA(q,ω; t), their main properties and their evolution with q and T are analyzed. The lowest order energy weighted sum rules of both S(q,ω;T ) and SIA(q,ω;T ) are also derived and commented. Finally, the q→∞ asymptotic behavior is analyzed and discussed in terms of scaling laws. 2000 Elsevier Science B.V. All rights reserved. PACS: 05.30.Fk; 61.12.Bt
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