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arXiv · 2605.05345

Squeezed Vibrational States in Superfluid Helium

Lev A. Melnikovsky
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Abstract

Ultrafast birefringence oscillations observed in superfluid helium provide evidence for anisotropic quantum squeezing of quasiparticle pairs. The measured response is a superposition of contributions from all vibrational modes, with dominant contributions from rotons, maxons, and Pitaevskii's plateau. The nonzero initial phase follows naturally from multimode interference.

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Lev A. Melnikovsky. 2026-05-06. Squeezed Vibrational States in Superfluid Helium. https://doi.org/10.1103/9yqq-nqqx

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