n SCP
k Generalized teleport (C4); param'ze.
k Entanglement swapping (C16):  from pure or mixed

* Read NC
* Forget about Mermin

* Density and projection operators
  - def'n:  pos def & trace 1
  - gen'zn of unit vr in hilbert space
  - cplx pos def => SA => diagble w/ o.n. eibas;
    pos def => eivals non-neg
    so psi = sum ci phi, pi = |ci|^2, rho = sum pi |phi_i><phi_i|
	really is general purpose?
* Partial trace; meas't P tensor I?
* Schmidt decomp <---> entanglement measure:  appears to suffice, from what
  I've seen in the literature.
* Schmidt decomp <---> SVD
k Entangled vs. mixed?  C4 vs. C2?

k Teleport:  replace Bell w/ another specific max-ent state.
  Then generalize by parameterizing?

* Singlets
* Doublets?  Triplets?
* SCP
k Entanglement swapping

* Perseguers?
* Nature:  quant-ph 0612167
* Other papers
* Bruss and Leuchs chs. 8 & 10

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General QM:

* discrete p,q opr's & their eigensystems.  ~tridiag; make sure to use
  periodic boundary conditions.

* hmn eigensolver

* type up griffiths notes

* type up seggev

* prove tr(rho) = 1.

* code up partial trace