Phonon Pair Creation by Inflating Quantum Fluctuations in an Ion Trap.

  title={Phonon Pair Creation by Inflating Quantum Fluctuations in an Ion Trap.},
  author={Matthias Wittemer and Frederick Hakelberg and Philip Kiefer and Jan-Philipp Schr{\"o}der and Christian Fey and R. Sch{\"u}tzhold and Ulrich Warring and Tobias Schaetz},
  journal={Physical review letters},
  volume={123 18},
Quantum theory predicts intriguing dynamics during drastic changes of external conditions. We switch the trapping field of two ions sufficiently fast to tear apart quantum fluctuations, i.e., create pairs of phonons and, thereby, squeeze the ions' motional state. This process can be interpreted as an experimental analog to cosmological particle creation and is accompanied by the formation of spatial entanglement. Hence, our platform allows one to study the causal connections of squeezing, pair… 

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