92 citations · 260 across the 27 of their papers we have counts for
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quant-ph1999
Purification of impure density operators and the recovery of entanglements
V. I. Man'ko, G. Marmo, E. C. G. Sudarshan +1
The need to retain the relative phases in quantum mechanics implies an addition law parametrized by a phase of two density operators required for the purification of a density matr…
gr-qc1999
A new look at relativity transformations
Ruggiero de Ritis, Giuseppe Marmo, Bruno Preziosi
A free system, considered to be a comparison system, allows for the notion of objective existence and inertial frame. Transformations connecting inertial frames are shown to be eit…