14 citations · 51 across the 11 of their papers we have counts for
4 papers · 1 filter
Partial scaling transform of multiqubit states as a criterion of separability
C. Lupo, V. Man'ko, G. Marmo +1
The partial scaling transform of the density matrix for multiqubit states is introduced to detect entanglement of quantum states. The transform contains partial transposition as a…
Schmidt states and positivity of linear maps
Aik-meng Kuah, E. C. G. Sudarshan
Using pure entangled Schmidt states, we show that m-positivity of a map is bounded by the ranks of its negative Kraus matrices. We also give an algebraic condition for a map to be…
Dynamics of Two Qubits: Decoherence and an Entanglement Optimization Protocol
Cesar A. Rodriguez, Anil Shaji, E. C. G. Sudarshan
The evolution of two qubits coupled by a general nonlocal interaction is studied in two distinct regimes. In the first regime the purity of the individual qubits is interchanged th…
Extension maps
Aik-meng Kuah, E. C. G. Sudarshan
We define extension maps as maps that extend a system (through adding ancillary systems) without changing the state in the original system. We show, using extension maps, why a com…