Numerical shadow

Example of a product numerical shadow restricted to real states

of matrix

$$\left(\begin{array}{cccc}1& 1& 1& 1\\ 0& i& 1& 1\\ 0& 0& -1& 1\\ 0& 0& 0& -\mathrm{i}\end{array}\right)$$

is forming an image of $\mathbb{R}{P}^1\times \mathbb{R}{P}^1$.

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Page created by

• Łukasz Pawela
• Piotr Gawron
• Jarosław Adam Miszczak
• Zbigniew Puchała
• Karol Życzkowski
• Paulina Lewandowska
• Ryszard Kukulski

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• Supported by Centre for Theoretical Physics, Polish Academy of Sciences.
• Maintained by Institute of Theoretical and Applied Informatics, Polish Academy of Sciences.