Optimal time for sensing in open quantum systems
ORAL
Abstract
We study the time-dependent quantum Fisher Information (QFI) in a simple open quantum system satisfying the Gorini-Kossakowski-Sudarshan-Lindblad master equation and
demonstrate that the conventional definition of the QFI can fail to correlate with the system dynamics. A modified form of the QFI is proposed that is shown to be superior and allows us to determine the optimal time for sensing in these open quantum systems. We also study the dynamics of the system from an effective non-Hermitian dynamics standpoint and use it to understand the scaling of quantum Fisher information with size of the system.
demonstrate that the conventional definition of the QFI can fail to correlate with the system dynamics. A modified form of the QFI is proposed that is shown to be superior and allows us to determine the optimal time for sensing in these open quantum systems. We also study the dynamics of the system from an effective non-Hermitian dynamics standpoint and use it to understand the scaling of quantum Fisher information with size of the system.
*This work is based upon work supported by the U.S. Department of Energy Office of Science National Quantum Information Science Research Centers.
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Presenters
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zain H Saleem
- Argonne National Laboratory