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Open Quantum Systems Decoherence
Local trade-off between information and disturbance in quantum measurements
arXiv
Authors: Hiroaki Terashima
Year
2020
Paper ID
20490
Status
Preprint
Abstract Read
~2 min
Abstract Words
91
Citations
N/A
Abstract
This study confirms a local trade-off between information and disturbance in quantum measurements. It is represented by the correlation between the changes in these two quantities when the measurement is slightly modified. The correlation indicates that when the measurement is modified to increase the obtained information, the disturbance also increases in most cases. However, the information can be increased while decreasing the disturbance because the correlation is not necessarily perfect. For measurements having imperfect correlations, this paper discusses a general scheme that raises the amount of information while decreasing the disturbance.
Why This Paper Matters
- This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
- It adds a 2020 reference point for readers tracking recent quantum research.
- This study confirms a local trade-off between information and disturbance in quantum measurements.
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