Notes on extremality of the Choi map

Choi, 1975, Positive semidefinite biquadratic forms, Linear Algebra Appl., 12, 95, 10.1016/0024-3795(75)90058-0

Choi, 1980, Some assorted inequalities for positive linear maps on C⁎-algebras, J. Operator Theory, 4, 271

Ha, 2011, Entanglement witnesses arising from exposed positive linear maps, Open Syst. Inf. Dyn., 18, 323, 10.1142/S1230161211000224

Ha

Kim, 1994, Indecomposable extreme positive linear maps in matrix algebras, Bull. Lond. Math. Soc., 26, 575, 10.1112/blms/26.6.575

Osaka, 1992, A class of extremal positive maps in 3×3 matrix algebras, Publ. Res. Inst. Math. Sci., 28, 747, 10.2977/prims/1195167934

Robertson, 1985, Positive projections on C⁎-algebras and an extremal positive map, J. Lond. Math. Soc. (2), 32, 133, 10.1112/jlms/s2-32.1.133

Sengupta, 2011, Extremal extensions of entanglement witnesses: Finding new bound entangled states, Phys. Rev. A, 84, 032328, 10.1103/PhysRevA.84.032328

Størmer, 1963, Positive linear maps of operator algebras, Acta Math., 110, 233, 10.1007/BF02391860