Dynamic Many-Body Theory: Dynamic Structure Factor of Two-Dimensional Liquid $$^4$$ 4 He

E. Krotscheck; T. Lichtenegger

doi:10.1007/s10909-014-1221-6

Dynamic Many-Body Theory: Dynamic Structure Factor of Two-Dimensional Liquid $$^4$$ 4 He

E. Krotscheck
, T. Lichtenegger

Physics

SUNY Buffalo
Johannes Kepler University Linz

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We calculate the dynamic structure function of two-dimensional liquid (Formula presented)$$^4$$ 4(/Formula presented) He at zero temperature employing a quantitative multi-particle fluctuations approach up to infinite order. We observe a behavior that is qualitatively similar to the phonon–maxon–roton-curve in 3D, including a Pitaevskii plateau (Pitaevskii, Sov. Phys. JETP 9:830, 1959). Slightly below the liquid–solid phase transition, a second weak roton-like excitation evolves below the plateau.

Original language	English
Pages (from-to)	61-77
Number of pages	17
Journal	Journal of Low Temperature Physics
Volume	178
Issue number	1-2
DOIs	https://doi.org/10.1007/s10909-014-1221-6
State	Published - Jan 2015

Keywords

Helium-II films
Multi-particle fluctuations
Phonon-Roton spectrum

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10.1007/s10909-014-1221-6

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title = "Dynamic Many-Body Theory: Dynamic Structure Factor of Two-Dimensional Liquid \$\$\textasciicircum{}4\$\$ 4 He",

abstract = "We calculate the dynamic structure function of two-dimensional liquid (Formula presented)\$\$\textasciicircum{}4\$\$ 4(/Formula presented) He at zero temperature employing a quantitative multi-particle fluctuations approach up to infinite order. We observe a behavior that is qualitatively similar to the phonon–maxon–roton-curve in 3D, including a Pitaevskii plateau (Pitaevskii, Sov. Phys. JETP 9:830, 1959). Slightly below the liquid–solid phase transition, a second weak roton-like excitation evolves below the plateau.",

keywords = "Helium-II films, Multi-particle fluctuations, Phonon-Roton spectrum",

author = "E. Krotscheck and T. Lichtenegger",

note = "Publisher Copyright: {\textcopyright} 2014, Springer Science+Business Media New York.",

year = "2015",

month = jan,

doi = "10.1007/s10909-014-1221-6",

language = "English",

volume = "178",

pages = "61--77",

journal = "Journal of Low Temperature Physics",

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TY - JOUR

T1 - Dynamic Many-Body Theory

T2 - Dynamic Structure Factor of Two-Dimensional Liquid $$^4$$ 4 He

AU - Krotscheck, E.

AU - Lichtenegger, T.

PY - 2015/1

Y1 - 2015/1

N2 - We calculate the dynamic structure function of two-dimensional liquid (Formula presented)$$^4$$ 4(/Formula presented) He at zero temperature employing a quantitative multi-particle fluctuations approach up to infinite order. We observe a behavior that is qualitatively similar to the phonon–maxon–roton-curve in 3D, including a Pitaevskii plateau (Pitaevskii, Sov. Phys. JETP 9:830, 1959). Slightly below the liquid–solid phase transition, a second weak roton-like excitation evolves below the plateau.

AB - We calculate the dynamic structure function of two-dimensional liquid (Formula presented)$$^4$$ 4(/Formula presented) He at zero temperature employing a quantitative multi-particle fluctuations approach up to infinite order. We observe a behavior that is qualitatively similar to the phonon–maxon–roton-curve in 3D, including a Pitaevskii plateau (Pitaevskii, Sov. Phys. JETP 9:830, 1959). Slightly below the liquid–solid phase transition, a second weak roton-like excitation evolves below the plateau.

KW - Helium-II films

KW - Multi-particle fluctuations

KW - Phonon-Roton spectrum

UR - https://www.scopus.com/pages/publications/84919705821

U2 - 10.1007/s10909-014-1221-6

DO - 10.1007/s10909-014-1221-6

M3 - Article

AN - SCOPUS:84919705821

SN - 0022-2291

VL - 178

SP - 61

EP - 77

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

IS - 1-2

ER -

Dynamic Many-Body Theory: Dynamic Structure Factor of Two-Dimensional Liquid $$^4$$ 4 He

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Keywords

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