I'm looking for specific examples of all combinations of pure, mixed, separable and entangled states, but I would prefer if they all have some physical significance.

For pure states, the separable ones are the vector states, they are pretty basic and for entangled pure states I thought of the Bell states.

However, I'm having trouble finding examples of mixed states, both separable and entangled, which are simple enough, but aren't completely arbitrarily constructed.

Does anyone have any ideas? Thanks!


Just mix the pure state examples you have.

  • $\begingroup$ This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post. - From Review $\endgroup$ – Cosmas Zachos Jan 13 '19 at 12:21
  • $\begingroup$ @CosmasZachos Why does it not provide an answer to the question? $\endgroup$ – Norbert Schuch Jan 13 '19 at 13:09
  • $\begingroup$ It is a brief hint, normally reserved for a brief comment. While I cannot second-guess the OP's confusion, I doubt this hint dispels it. Please contrast to the friendlier answer of the duplicate question. $\endgroup$ – Cosmas Zachos Jan 13 '19 at 14:27
  • $\begingroup$ @CosmasZachos Answers in comments are discouraged, so I recently started to put such comments which are in fact answers into answers. I understand this is encouraged by the mods. $\endgroup$ – Norbert Schuch Jan 13 '19 at 14:33
  • $\begingroup$ We may be circling the drain of quibbles. I think @Luboš Motl 's answer does not belong to comments, but your hint does. I could visualize the OP asking further clarifications in the comments, in which case you could provide a less tautological answer going to the heart of his confusion and satisfying him. But this has a whiff of meta, doesn't it? $\endgroup$ – Cosmas Zachos Jan 13 '19 at 14:43

Not the answer you're looking for? Browse other questions tagged or ask your own question.