Abstract
Liquid helium under negative pressure represents a unique possibility for studying the macroscopic quantum nucleation phenomena in condensed media. We analyze the quantum cavitation rate of single electron bubbles at low temperatures down to absolute zero. The energy dissipation and sound emission processes result in the different temperature behavior of quantum cavitation rate in normal fluid $^{3}\mathrm{He}$ and superfluid $^{4}\mathrm{He}$ below the thermal-quantum crossover temperature. The position of the rapid nucleation line in the temperature-pressure phase diagram is discussed as well.
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