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Currently, Master's student in Mathematical physics and I am doing research about QUANTUM CRyptography.

Please can someone show me how to draw the phase diagrams for this function here? enter image description here

How can I draw a plot like this one? enter image description here

I'd appreciate some help. Thanks.

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closed as unclear what you're asking by yohbs, Jens, m_goldberg, MarcoB, Yves Klett Apr 29 '17 at 6:20

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ I don't know how to write the function in this site ! $\endgroup$ – Nabil Khossossi Apr 28 '17 at 19:07
  • $\begingroup$ i tried but it doesn't work $\endgroup$ – Nabil Khossossi Apr 28 '17 at 19:11
  • $\begingroup$ @NabilKhossossi Can you share a link to the source of the graph? $\endgroup$ – zhk Apr 28 '17 at 19:37
  • $\begingroup$ sci-hub.cc/10.1142/S0217979209053631 page 6 ! $\endgroup$ – Nabil Khossossi Apr 28 '17 at 19:41
  • $\begingroup$ You would use ContourPlot. $\endgroup$ – Jens Apr 28 '17 at 21:25