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Rotons and Roton Wave Packets in Superfluid 4 He Bears Jersey uk co Www Chicago 4Helol Jags Colts Uniforms New

D. E. Galli, E. Cecchetti, and L. Reatto
Phys. Rev. Lett. 77, 5401 – Published 30 December 1996
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Abstract Bears Jersey uk co Www Chicago

We give new information on the excitations in superfluid 4 He 4He. By a variational computation we obtain a very accurate description of the excitations; the energy spectrum has deviation from experiment at the level of 5 % 5%. The first microscopic study of roton wave packets is presented. R + R+ and R Jersey 3 Negro Seahawks Limitada Russell Wilson Edici��nR rotons cannot be described as single particle excitations due to interference effects between neighboring atoms. The roton minimum corresponds to the special wave vector where this interference disappears and the local density and momentum essentially coincide with those of a single particle excitation.

  • Received 13 September 1996

DOI:https://doi.org/10.1103/PhysRevLett.77.5401

©1996 American Physical Society

Authors & Affiliations

D. E. Galli, E. Cecchetti, and L. Reatto

  • Interuniversitario di Fisica della Meteria and Dipartimento di Fisica, Università di Milano, Via Celoria 16, 20133 Milano, Italy

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Vol. 77, Iss. 27 — 30 December 1996

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