Ancilla-Free Quantum Error Correction Codes for Quantum Metrology.

@article{Layden2019AncillaFreeQE,
  title={Ancilla-Free Quantum Error Correction Codes for Quantum Metrology.},
  author={D. Layden and Sisi Zhou and P. Cappellaro and Liang Jiang},
  journal={Physical review letters},
  year={2019},
  volume={122 4},
  pages={
          040502
        }
}
Quantum error correction has recently emerged as a tool to enhance quantum sensing under Markovian noise. It works by correcting errors in a sensor while letting a signal imprint on the logical state. This approach typically requires a specialized error-correcting code, as most existing codes correct away both the dominant errors and the signal. To date, however, few such specialized codes are known, among which most require noiseless, controllable ancillas. We show here that such ancillas are… Expand
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