Abstract
The ground state of strongly interacting Fermi fluids, specifically 3He, is well understood, using either simulation or correlated basis function techniques. However, the manifestly microscopic determination of the dynamics of such systems still poses a number of open problems. One of these is the importance of exchange effects in the density channel. The subject of this work is to clarify this question.
We demonstrate here that exchange effects are, even in the density channel, not negligible. The main consequence is a lowering of the collective mode toward the particle-hole continuum in agreement with recent measurements on 3He. In the experiment also a strong damping of the collective mode is observed. Our results show that we should, by including self-energy corrections and multipair-fluctuations, be able to determine conclusively the many-particle aspects of that effect.
Similar content being viewed by others
References
C.H. Aldrich III, D. Pines, J. Low Temp. Phys. 31(5/6), 689 (1978)
E. Krotscheck, Phys. Rev. A 26, 3536 (1982)
H.W. Jackson, Phys. Rev. A 8, 1529 (1973)
D.J. Thouless, The Quantum Mechanics of Many-Body Systems, 2nd edn. (Academic Press, New York, 1972)
J.M.C. Chen, J.W. Clark, D.G. Sandler, Z. Phys. A 305, 223 (1982)
N.H. Kwong, Realistic calculations of excitations in nuclear matter. Ph.D. thesis, California Institute of Technology (1982)
H.M. Böhm, R. Holler, E. Krotscheck, M. Panholzer, Int. J. Mod. Phys. B 22, 4655 (2008)
A.K. Kerman, S.E. Koonin, Ann. Phys. (NY) 100, 332 (1976)
H.M. Böhm, E. Krotscheck, M. Panholzer, H. Godfrin, H.J. Lauter, M. Meschke, Two-dimensional 3He: A crucial system for understanding fermion dynamics (2009). These proceedings
C.H. Aldrich, D. Pines, J. Low Temp. Phys. 25, 677 (1976)
R.A. Aziz, F.R.W. McCourt, C.C.K. Wong, Mol. Phys. 61, 1487 (1987)
H.R. Glyde, B. Fåk, N.H. van Dijk, H. Godfrin, K. Guckelsberger, R. Scherm, Phys. Rev. B 61, 1421 (2000)
B. Fåk, K. Guckelsberger, R. Scherm, A. Stunault, J. Low Temp. Phys. 97, 445 (1994)
D. Pines, P. Nozieres, The Theory of Quantum Liquids, vol. I (Benjamin, New York, 1966)
B.L. Friman, E. Krotscheck, Phys. Rev. Lett. 49, 1705 (1982)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Panholzer, M., Böhm, H.M., Holler, R. et al. Exchange Effects and the Dynamics of 3He. J Low Temp Phys 158, 135–140 (2010). https://doi.org/10.1007/s10909-009-9986-8
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10909-009-9986-8