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A physical noise model for quantum measurements

by Faedi Loulidi, Ion Nechita, Clément Pellegrini

Submission summary

Authors (as registered SciPost users): Faedi Loulidi · Ion Nechita
Submission information
Preprint Link:  (pdf)
Date submitted: 2024-05-21 05:56
Submitted by: Loulidi, Faedi
Submitted to: SciPost Physics
Ontological classification
Academic field: Physics
  • Quantum Physics
Approach: Theoretical


In this paper we introduce a novel noise model for quantum measurements motivated by an indirect measurement scheme with faulty preparation. Averaging over random dynamics governing the interaction between the quantum system and a probe, a natural, physical noise model emerges. We compare it to existing noise models (uniform and depolarizing) in the framework of incompatibility robustness. We observe that our model allows for larger compatibility regions for specific classes of measurements.

Author indications on fulfilling journal expectations

  • Provide a novel and synergetic link between different research areas.
  • Open a new pathway in an existing or a new research direction, with clear potential for multi-pronged follow-up work
  • Detail a groundbreaking theoretical/experimental/computational discovery
  • Present a breakthrough on a previously-identified and long-standing research stumbling block

List of changes

We have made the changes by making some clarifications of our results as was suggested by the reviewers.

-We have modified the introduction by clarifying the setting and the different results obtained in this work.
-We added a conclusion section, making our results clearer with possible open directions to explore.

Current status:
In refereeing

Reports on this Submission

Anonymous Report 1 on 2024-5-23 (Invited Report)


The strength of the paper is to open up a new theoretical direction for analysing noise models of measurements. The novel models are physically relevant, as they originate from deviations in a theoretical model of a quantum measurement device. The results are also very timely, as the effect of deviations in one's apparatuses has recently been also discussed in the related steering literature, cf. Phys. Rev. Lett. 132, 070204 (2024) and Phys. Rev. A 108, L040401 (2023).


I do not see any big weaknesses, the paper sets a clear question and analyses it thoroughly. In the spirit of what is said above about steering, it would be nice to see how the deviations presented here affect the detection strength of quantum correlations, i.e. how the bounds on known entanglement or steering witnesses have to be rescaled, given that one's detectors are faulty. But this is more of a possible future direction, that is not the point of the current manuscript.


The met criterion in my view is "Open a new pathway in an existing or a new research direction, with clear potential for multi-pronged follow-up work". The paper opens up the possibility to analyse new types of noise models and their effect on properties of measurements. Beyond providing a new way of modelling faulty measurements, this has clear near-term opportunities in quantum correlations, one of which is mentioned above.

Requested changes

No requested changes.


Publish (meets expectations and criteria for this Journal)

  • validity: top
  • significance: high
  • originality: top
  • clarity: top
  • formatting: excellent
  • grammar: excellent

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