Quantum-Limited Position Measurements of a Dark Matter-Wave Soliton

  title={Quantum-Limited Position Measurements of a Dark Matter-Wave Soliton},
  author={Antonio Negretti and Carsten Henkel and Klaus M{\o}lmer},
We show that the position of a dark matter-wave soliton in a quasi-one-dimensional BEC can be determined with a precision that scales with the atomic density as n(-3/4), without particular squeezing or entanglement. 

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