#Coherence and #Contextuality fuel advantages in quantum information. It is crucial to #certify the presence of these in current #QuantumDevices.
In our #New_paper out on #Science_Advances
✅ We certify/benchmark their presence,
✅ We demonstrate that contextuality provides a quantum advantage for an information task,
✅ We benchmark coherence achieved only by using a major part of the device,
✅ The device is fabricated with state-of-the-art laser writing techniques
All "interpretation is a performative transformation of the material condition of an artifact." — Johanna Drucker, /SpecLab/, 96
#RomanticPeriodPoetryArchive #Contextuality #Romanticism #GlobalTexts #PoetryInContexts #GlobalRomanticism
We have recently clarified the role of #coherence in #contextuality inequalities in https://arxiv.org/abs/2209.02670. One of the big picture view is to push the idea of coherence as a relational property of set of states, formally introduced in the Resource Theory paradigm in this paper https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.126.220404
The recent result by Vinicius P. Rossi et al https://arxiv.org/abs/2212.06856 advances the state-of-the-art in a direction of analysing those resources from the usual paradigm. Really interesting result!!!
Quantum coherence, nonlocality, and contextuality are key resources for quantum advantage in metrology, communication, and computation. We introduce a graph-based approach to derive classicality inequalities that bound local, non-contextual, and coherence-free models, offering a unified description of these seemingly disparate quantum resources. Our approach generalizes recently proposed basis-independent coherence witnesses, and recovers all non-contextuality inequalities of the exclusivity graph approach. Moreover, violations of certain classicality inequalities witness preparation contextuality. We describe an algorithm to find all such classicality inequalities, and use it to analyze some of the simplest scenarios.
Alexander Huber
Quantum Observer
Rafael Wagner