Abstract
We investigate the collective excitations of 3He-4He mixture films at zero temperature within the random phase approximation and linear response theory. In a low concentration regime of 3He, a level repulsion between zero sound and third sound modes is derived, which opens the possibility to observe quantum mechanical coherence between a 3He particle-hole pair and the condensate of 4He. We also investigate the 3He-4He vertex corrections in the ladder approximation, and show that the third branch, the combined mode of fermionic particle-hole pair and the third sound quanta, provides a unique correction to the Landau f function. Some implications for a fermion-boson mixture of alkali atoms in a potential trap are discussed.
| Original language | English |
|---|---|
| Article number | 064501 |
| Pages (from-to) | 645011-645015 |
| Number of pages | 5 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 68 |
| Issue number | 6 |
| Publication status | Published - 2003 Aug |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Effects of fermion-boson interaction in neutral atomic systems. / Yokoshi, Nobuhiko; Kurihara, Susumu.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 68, No. 6, 064501, 08.2003, p. 645011-645015.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effects of fermion-boson interaction in neutral atomic systems
AU - Yokoshi, Nobuhiko
AU - Kurihara, Susumu
PY - 2003/8
Y1 - 2003/8
N2 - We investigate the collective excitations of 3He-4He mixture films at zero temperature within the random phase approximation and linear response theory. In a low concentration regime of 3He, a level repulsion between zero sound and third sound modes is derived, which opens the possibility to observe quantum mechanical coherence between a 3He particle-hole pair and the condensate of 4He. We also investigate the 3He-4He vertex corrections in the ladder approximation, and show that the third branch, the combined mode of fermionic particle-hole pair and the third sound quanta, provides a unique correction to the Landau f function. Some implications for a fermion-boson mixture of alkali atoms in a potential trap are discussed.
AB - We investigate the collective excitations of 3He-4He mixture films at zero temperature within the random phase approximation and linear response theory. In a low concentration regime of 3He, a level repulsion between zero sound and third sound modes is derived, which opens the possibility to observe quantum mechanical coherence between a 3He particle-hole pair and the condensate of 4He. We also investigate the 3He-4He vertex corrections in the ladder approximation, and show that the third branch, the combined mode of fermionic particle-hole pair and the third sound quanta, provides a unique correction to the Landau f function. Some implications for a fermion-boson mixture of alkali atoms in a potential trap are discussed.
UR - http://www.scopus.com/inward/record.url?scp=0141728425&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0141728425&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0141728425
VL - 68
SP - 645011
EP - 645015
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 6
M1 - 064501
ER -