Detecting Large Quantum Fisher Information with Finite Measurement Precision.

  title={Detecting Large Quantum Fisher Information with Finite Measurement Precision.},
  author={Florian Fr{\"o}wis and Pavel Sekatski and Wolfgang D{\"u}r},
  journal={Physical review letters},
  volume={116 9},
We propose an experimentally accessible scheme to determine the lower bounds on the quantum Fisher information (QFI), which ascertains multipartite entanglement or usefulness for quantum metrology. The scheme is based on comparing the measurement statistics of a state before and after a small unitary rotation. We argue that, in general, the limited resolution of collective observables prevents the detection of large QFI. This can be overcome by performing an additional operation prior to the… Expand
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Quantum detection and estimation theory
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Getting the books quantum detection and estimation theory now is not type of challenging means. You could not unaided going following books hoard or library or borrowing from your friends to gainExpand
Abstract: About a decade ago, biophysicists observed an approximately linear relationship between the combinatorial complexity of knotted DNA and the distance traveled in gel electrophoresisExpand
Science today studies phenomena lasting less than 10−21 s and phenomena which occurred more than 13 billion years ago; science also studies phenomena occurring over distances greater than 1028 cm andExpand
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I am writing with a simple plea to balance the voluminous articles about treatment in your journal with a modicum of information about nature and caring effects to rekindle the perception of physicians as healers, not only treaters, who relish the gifts of nature, and foster the humanistic aspect of medicine that has thrived for millennia. Expand
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