Roton backflow and the temperature dependence of the static structure factor of superfluid [sup 4]He

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Journal of Low Temperature Physics; (United States)

DOI:https://doi.org/10.1007/BF00682337· OSTI ID:5796773

Oddi, L ^[1]; Whitlock, P A ^[2]; Reatto, L ^[3]

---

1. Dipartimento di Fisica dell' Universita, Parma (Italy)
2. Brooklyn College, NY (United States)
3. Dipartimento di Fisica dell' Universita, Milano (Italy)

The temperature dependence of the static structure factor of superfluid [sup 4]He is given an interpretation in terms of the Feynman-Cohen picture of the elementary excitations by constructing the corresponding microscopic density matrix and including the effect of three-body terms. The required information on the ground-state wave function is taken over from configurations drawn from a Green's Function Monte Carlo computation. Correlations become stronger at finite temperatures in agreement with experiment. Backflow has only a modest effect on S(k, T). 26 refs., 6 figs.

• OSTI ID: 5796773
• Journal Information: Journal of Low Temperature Physics; (United States), Journal Name: Journal of Low Temperature Physics; (United States) Vol. 92:3-4; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

665420* -- Superfluidity-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALCULATION METHODS
DENSITY MATRIX
EVEN-EVEN NUCLEI
HELIUM 4
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MATRICES
MONTE CARLO METHOD
NUCLEI
QUASI PARTICLES
ROTONS
STABLE ISOTOPES
STRUCTURE FACTORS
SUPERFLUIDITY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K