Ultrafast coherent control with femtosecond pulses enables spectroscopy of roton, maxon, and Pitaevskii-plateau quasiparticle pairs in superfluid helium, with ab initio analysis explaining the roton spectral lineshape.
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Coherent spectroscopy of collective excitations in superfluid helium far from equilibrium
Ultrafast coherent control with femtosecond pulses enables spectroscopy of roton, maxon, and Pitaevskii-plateau quasiparticle pairs in superfluid helium, with ab initio analysis explaining the roton spectral lineshape.