Abstract
Recently certain controversies have arisen over the form and direction of the phonon dispersion and the nature of the two-roton excitation in liquid helium. From the standpoint both of theoretical elegance and of satisfactorily interpreting experimental data in a way consistent with sum rules, it is highly desirable to develop a theory which accounts for the two branches of excitations on equal footing, at least in the limit of long wavelengths. We discuss here such an attempt. It is a microscopic theory based on a generalization of Feynman’s treatment of the phonon-roton spectrum.
Work supported in part by the National Science Foundation through Grant No. GP-29130 and through the Materials Research Center of Northwestern University.
Alfred P. Sloan Research Fellow.
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References
H.W. Jackson and E. Feenberg, Rev. Mod. Phys. 34, 686 (1962).
H.-W. Lai, H.-K. Sim, and C.-W. Woo, Phys. Rev. Al, 1536 (1970).
D. Pines and C.-W. Woo, Phys. Rev. Lett. 24, 1044 (1970).
P.R. Roach, B.M. Abraham, J.B. Ketterson, and M. Kuchnir, Phys. Rev. Lett. 29, 32 (1972).
R.B. Hallock, Phys. Rev. A5 320 (1972); and private communications.
R.A. Cowley and A.D.B. Woods, Can. J. Phys. 49, 177 (1971).
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© 1974 Springer Science+Business Media New York
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Woo, CW. (1974). Elementary Excitations in Liquid Helium. In: Timmerhaus, K.D., O’Sullivan, W.J., Hammel, E.F. (eds) Low Temperature Physics-LT 13. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-7864-8_12
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DOI: https://doi.org/10.1007/978-1-4684-7864-8_12
Publisher Name: Springer, Boston, MA
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