Efficient measurement of quantum dynamics via compressive sensing.

  title={Efficient measurement of quantum dynamics via compressive sensing.},
  author={Alireza Shabani and Robert L. Kosut and Masoud Mohseni and Herschel A. Rabitz and Matthew A. Broome and M. P. Almeida and Alessandro Fedrizzi and A. G. White},
  journal={Physical review letters},
  volume={106 10},
The resources required to characterize the dynamics of engineered quantum systems--such as quantum computers and quantum sensors--grow exponentially with system size. Here we adapt techniques from compressive sensing to exponentially reduce the experimental configurations required for quantum process tomography. Our method is applicable to processes that are nearly sparse in a certain basis and can be implemented using only single-body preparations and measurements. We perform efficient, high… 

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