142 citations · 188 across the 9 of their papers we have counts for
9 papers
On-State Commutativity of Measurements and Joint Distributions of Their Outcomes
Jan Czajkowski, Alex B. Grilo
In this note, we analyze joint probability distributions that arise from outcomes of sequences of quantum measurements performed on sets of quantum states. First, we identify some…
Quantum Lazy Sampling and Game-Playing Proofs for Quantum Indifferentiability
Jan Czajkowski, Christian Majenz, Christian Schaffner +1
Game-playing proofs constitute a powerful framework for non-quantum cryptographic security arguments, most notably applied in the context of indifferentiability. An essential ingre…
Many-body effects in quantum metrology
Jan Czajkowski, Krzysztof Pawłowski, Rafał Demkowicz-Dobrzański
We study the impact of many-body effects on the fundamental precision limits in quantum metrology. On the one hand such effects may lead to non-linear Hamiltonians, studied in the…
One-point boundaries of ends of clusters in percolation in
Jan Czajkowski
Consider Bernoulli bond percolation on a graph nicely embedded in hyperbolic space in such a way that it admits a transitive action by isometries of . Le…
Adaptive quantum metrology under general Markovian noise
R. Demkowicz-Dobrzanski, J. Czajkowski, P. Sekatski
We consider a general model of unitary parameter estimation in presence of Markovian noise, where the parameter to be estimated is associated with the Hamiltonian part of the dynam…
Super-additivity in communication of classical information through quantum channels from a quantum parameter estimation perspective
Jan Czajkowski, Marcin Jarzyna, Rafal Demkowicz-Dobrzanski
We point out a contrasting role the entanglement plays in communication and estimation scenarios. In the first case it brings noticeable benefits at the measurement stage (output s…