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quant-ph2025
Semi-device-independent channel identification with communication matrices
Samgeeth Puliyil, Leevi Leppäjärvi, Mário Ziman
We look into the task of differentiating between any two quantum channels and reconstructing them from the obtained measurement statistics with possibly limited information about t…
quant-ph2021
Measurement simulability and incompatibility in quantum theory and other operational theories
Leevi Leppäjärvi
In this thesis, we consider the properties of measurements in quantum theory and other operational theories. After having introduced the framework of operational theories, we consi…
quant-ph2018
Simulability of observables in general probabilistic theories
Sergey N. Filippov, Teiko Heinosaari, Leevi Leppäjärvi
The existence of incompatibility is one of the most fundamental features of quantum theory, and can be found at the core of many of the theory's distinguishing features, such as Be…