Sergey N. Filippov

Positive tensor products of maps and <i>n</i> -tensor-stable positive qubit maps

2017 · Journal of Physics A Mathematical and Theoretical

Abstract We analyze positivity of a tensor product of two linear qubit maps, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mstyle displaystyle="false"> <mml:mstyle displaystyle="false"> <mml:msub> <mml:mrow> <mml:mi mathvariant="normal">Φ</mml:mi> </mml:mrow> <mml:mn>1</mml:mn> </mml:msub> </mml:mstyle> <mml:mo>⊗</mml:mo> <mml:mstyle displaystyle="false"> <mml:msub> <mml:mi mathvariant="normal">Φ</mml:mi> <mml:mn>2</mml:mn> …