Journal of Low Temperature Physics

, Volume 148, Issue 3–4, pp 199–206

Observations of the Motion of Single Electrons in Liquid Helium



We have developed an apparatus which can be used to monitor the motion of individual electrons in liquid helium. A sound wave is used to explode an electron bubble for a fraction of a microsecond. While the bubble is expanded, it is illuminated by light from a flash lamp. We describe the details of the experiment and show results obtained. In some cases, an electron is seen to follow a snakelike path. Our tentative explanation is that the electron is sliding along a quantized vortex line. If this interpretation is correct, the recorded track of the electron provides an image of the path of the vortex.


67.40 77.22-d 


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Department of PhysicsBrown UniversityProvidenceUSA

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