104 citations · 1.2k across the 57 of their papers we have counts for
5 papers · 1 filter
Local two-qubit entanglement-annihilating channels
Sergey N. Filippov, Tomas Rybar, Mario Ziman
We address the problem of the robustness of entanglement of bipartite systems (qubits) interacting with dynamically independent environments. In particular, we focus on characteriz…
Star product and ordered moments of photon creation and annihilation operators
S. N. Filippov, V. I. Man'ko
We develop a star-product scheme of symbols defined by the normally ordered powers of the creation and annihilation photon operators, (a†)^m a^n. The corresponding phase space is a…
Measuring microwave quantum states: tomogram and moments
Sergey N. Filippov, Vladimir I. Man'ko
Two measurable characteristics of microwave one-mode photon states are discussed: a rotated quadrature distribution (tomogram) and normally/antinormally ordered moments of photon c…
Optical tomography of Fock state superpositions
S. N. Filippov, V. I. Man'ko
We consider optical tomography of photon Fock state superpositions in connection with recent experimental achievements. The emphasis is put on the fact that it suffices to represen…
Unitary and Non-Unitary Matrices as a Source of Different Bases of Operators Acting on Hilbert Spaces
S. N. Filippov, V. I. Man'ko
Columns of d^2 x N matrices are shown to create different sets of N operators acting on -dimensional Hilbert space. This construction corresponds to a formalism of the star-prod…