Distinguishing decoherence from alternative quantum theories by dynamical decoupling

  title={Distinguishing decoherence from alternative quantum theories by dynamical decoupling},
  author={Christian Arenz and Robin Hillier and Martin Fraas and Daniel Burgarth},
  journal={Physical Review A},
A long-standing challenge in the foundations of quantum mechanics is the verification of alternative collapse theories despite their mathematical similarity to decoherence. To this end, we suggest a method based on dynamical decoupling. Experimental observation of nonzero saturation of the decoupling error in the limit of fast-decoupling operations can provide evidence for alternative quantum theories. The low decay rates predicted by collapse models are challenging, but high-fidelity… 

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