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Abstract
A typical bipartite quantum protocol, such as EPR-steering, relies on two quantum features, entanglement of states and incompatibility of measurements. Noise can delete both of these quantum features. In this work we study the behavior of incompatibility under noisy quantum channels. The starting point for our investigation is the observation that compatible measurements cannot become incompatible by the action of any channel. We focus our attention to channels which completely destroy the incompatibility of various relevant sets of measurements. We call such channels incompatibility breaking, in analogy to the concept of entanglement breaking channels. This notion is relevant especially for the understanding of noise-robustness of the local measurement resources for steering
Original language | English |
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Article number | 435301 |
Pages (from-to) | 1-23 |
Number of pages | 23 |
Journal | Journal of Physics A: Mathematical and Theoretical |
Volume | 48 |
Issue number | 43 |
DOIs | |
Publication status | Published - 07 Oct 2015 |
Keywords
- incompatibility
- quantum channel
- quantum measurement
- quantum observable
- steering
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Projects
- 1 Finished
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Control characterisation of noisy quantum devices
Burgarth, D. (PI)
Engineering and Physical Sciences Research Council
01 Jun 2015 → 30 Sept 2016
Project: Externally funded research