Direct evidence for R- rotons having antiparallel momentum and velocity

Science

Volumn 283, Issue 5405, 1999, Pages 1150-1152

  Tucker, M A H ^a   Wyatt, A F G ^a  

^a UNIVERSITY OF EXETER   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

HELIUM;

ARTICLE; EVAPORATION; MOLECULAR DYNAMICS; PHYSICS; PRIORITY JOURNAL; QUANTUM MECHANICS; VELOCITY;

EID: 0033582805     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.283.5405.1150     Document Type: Article

References (19)

1. 0. The Newtonian racquet is assumed, as usual, to have a mass larger than that of the ball.
2. L. D. Landau, J. Phys. Moscow 11, 91 (1347).
3. H. Palevsky, K. Otnes, K. E. Larsson, Phys. Rev. 112, 11 (1958).
4. J. L. Yarnell, G. P. Arnold, P. J. Bendt, E. C. Kerr, ibid. 113, 1379 (1959).
5. H. R. Glyde, M. R. Gibbs, W. G. Stirling, M. A. Adams, Europhys. Lett. 43, 422 (1998).
6. W. G. Stirling, in Proceedings of the Second Internal Conference on Phonon Physics, J. Kollár, N. Kroó, N. Menyhárd, T. Siklós, Eds. (World Scientific, Singapore, 1985), pp. 829-835.
7. M. A. H. Tucker and A. F. G. Wyatt, J. Low Temp. Phys. 113, 615 (1998).
8. P. W. Anderson, Phys. Lett. 29A, 563 (1969).
9. M. W. Cole, Phys. Rev. Lett. 28, 1622 (1972).
10. M. J. Baird, F. R. Hope, A. F. G. Wyatt, Nature 304, 325 (1983).
11. F. R. Hope, M. J. Baird, A. F. G. Wyatt, Phys. Rev. Lett. 52, 1528 (1984).
12. M. Brown and A. F. G. Wyatt, J. Phys. Condens. Matter 2, 5025 (1990).
13. M. A. H. Tucker and A. F. G. Wyatt, J. Low Temp. Phys. 110, 455 (1998).
14. When the cavity roton source was replaced by a single heater, there was no evidence for quantum evaporation signals from R rotons.
15. H. Baddar, D. O. Edwards, T. M. Levin, M. S. Pettersen, Physica B 194-6, 513 (1994).
16. F. Dalfovo, A. Fracchetti, A. Lastri, L. Pitaevskii, S. Stringari, Phys. Rev. Lett. 75, 2510 (1995).
17. C. E. Campbell, E. Krotscheck, M. Saarela, ibid. 80, 2169 (1998).
18. M. B. Sobnack and J. C. Inkson, Phys. Rev. B 56, R14271 (1997).
19. We thank the Engineering and Physical Sciences Research Council for financial support, M. Gear for making the apparatus, and C. D. H. Williams for advice on the electronic detection system. We benefited from general discussions with F. Dalfovo, M. Guilleumas, E. Krotscheck, M. B. Sobnack, S. Stringari, and C. D. H. Williams.