77 citations · 264 across the 21 of their papers we have counts for
4 papers · 2 filters
Universality and optimality of programmable quantum processors
Mario Ziman, Vladimir Buzek
We analyze and compare the optimality of approximate and probabilistic universal programmable quantum processors. We define several characteristics how to quantify the optimality a…
Entanglement, purity and energy: Two qubits vs Two modes
Derek McHugh, Mario Ziman, Vladimir Buzek
We study the relationship between the entanglement, mixedness and energy of two-qubit and two-mode Gaussian quantum states. We parametrize the set of allowed states of these two fu…
Notes on optimality of direct characterisation of quantum dynamics
Mario Ziman
We argue that the claimed optimality of a new process tomography method suggested in [quant-ph/0601033] and [quant-ph/0601034] is based on not completely fair comparison that does…
Quantum process tomography: the role of initial correlations
Mario Ziman
We address the problem of quantum process tomography with the preparators producing states correlated with the environmental degrees of freedom that play role in the system-environ…