Lobachevskii Journal of Mathematics

, Volume 39, Issue 1, pp 65–70 | Cite as

Spin Polarization-Scaling Quantum Maps and Channels



We introduce a spin polarization-scaling map for spin-j particles, whose physical meaning is the decrease of spin polarization along three mutually orthogonal axes. We find conditions on three scaling parameters under which the map is positive, completely positive, entanglement breaking, 2-tensor-stable positive, and 2-locally entanglement annihilating. The results are specified for maps on spin-1 particles. The difference from the case of spin-1/2 particles is emphasized.

Keywords and phrases

Spin polarization qubit qutrit positive map quantum channel entanglement breaking 2-tensor-stable properties 


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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  1. 1.Moscow Institute of Physics and TechnologyDolgoprudnyRussia

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