Observation of soliton-like waves in adsorbed films of superfluid 4He

✍ Scribed by M.J. McKenna; R.J. Stanley; Elaine DiMasi; J.D. Maynard

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 195 KB
• Volume: 165-166
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/s0921-4526(90)81151-d

✦ Synopsis

While there has been considerable theoretical attention given to nonlinear (soliton) effects for adsorbed films of superfluid 4He, there have been no systematic experimental studies.

In this paper we report measurements of wave propagation in such films with drive levels varying over five orders of magnitude.

In addition to the critical saturation of a third sound wave, we observe another wave whose velocity of propagation changes with drive amplitude (linearly over a limited range).

This dependence agrees with theoretical predictions for soliton behavior.