14 citations · 51 across the 11 of their papers we have counts for
17 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…
Note on Non-relativistic proof of the spin-statistics connection in the Galilean frame
E. C. G. Sudarshan, Anil Shaji
We reply to the critique by Pucchini and Vucetich of our construction of a non-relativistic proof of the spin-statistics connection using SU(2) invariance and a Weiss-Schwinger act…
Consistent measurement of a quantum dynamical variable using classical apparatus
E. C. G. Sudarshan
The claim that there is an inconsistency of quantum-classical dynamics [1] is investigated. We point out that a consistent formulation of quantum and classical dynamics which can b…