376 citations · 785 across the 27 of their papers we have counts for
7 papers · 1 filter
f-oscillators deformation for Moyal algebras
V. I. Man'ko, G. Marmo, E. C. G. Sudarshan +1
Using general construction of star-product the q-deformed Wigner-Weyl-Moyal quantization procedure is elaborated. The q-deformed Groenewold kernel determining the product of quantu…
A hazard of open quantum dynamics: Markov approximations encounter map domains
Thomas F. Jordan, Anil Shaji, E. C. G. Sudarshan
A Markov approximation in open quantum dynamics can give unphysical results when a map acts on a state that is not in its domain. This is examined here in a simple example, an open…
How state preparation can affect a quantum experiment: Quantum process tomography for open systems
Aik-meng Kuah, Kavan Modi, César A. Rodríguez-Rosario +1
We study the effects of preparation of input states in a quantum tomography experiment. We show that maps arising from a quantum process tomography experiment (called process maps)…
The geometry of density states, positive maps and tomograms
V. I. Man'ko, G. Marmo, E. C. G. Sudarshan +1
The positive and not completely positive maps of density matrices, which are contractive maps, are discussed as elements of a semigroup. A new kind of positive map (the purificatio…
Entanglement increase from local interactions with not-completely-positive maps
Thomas F. Jordan, Anil Shaji, E. C. G. Sudarshan
Simple examples are constructed that show the entanglement of two qubits being both increased and decreased by interactions on just one of them. One of the two qubits interacts wit…
Relaxation Phenomena in a System of Two Harmonic Oscillators
Antonia Chimonidou, E. C. G. Sudarshan
We study the process by which quantum correlations are created when an interaction Hamiltonian is repeatedly applied to a system of two harmonic oscillators for some characteristic…