Elementary excitations in quantum Bose fluids: Application to liquid
- 1 April 1986
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 33 (7), 4596-4603
- https://doi.org/10.1103/physrevb.33.4596
Abstract
The optimizing Euler equations for the dynamic linear-response function are derived starting from the Jastrow ansatz for the wave function and including also the backflow effect. The elementary excitations in liquid are calculated consistently using the hypernetted-chain approximation for the uniform system as well as for weakly disturbed static and dynamic systems. The resulting excitation-energy spectrum is found to agree well with experiments up to the maxon region giving a maxon energy of 14.05 K and a roton energy of 11.7 K.
Keywords
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