Recent content by ouacc

Thanks. But I couldn't figure out how to get the observables you mentioned in a real experiment.

say an ensemble consisting of N IDENTICAL bipartite systems. The system can be in either of the two situations. A) Two particles in a bipartite system are entangled as |psi>= 1/sqrt(2) ( |00> + |11> ) so the density matrix is rho1 = |psi> <psi| = 1/2 *{1 0 0 1} * {1...

Say we have a BELL state |B00> = cos(a) |00>+ sin(a) |11> then for a (just one) pair of entangled particles, we keep one on location q, the other one in location w; the one in q forms a system Q, the one in w forms W. ( 'x' in a function like |v> x |w> indicates a tensor product)...

Now, here is the problem. (Capital letters indicate operators, lower letters are states, * indicates Hermitian conjugate) Say we know that state | p > = cos(a) |0> + sin(a) |1> (0<a<PI, a is in R) Two operators : M1= |0><0| , M2=|1><1|, apperatantly they satisfy the...

A related argument. let's assume a photon pair from positronium annihilation(Wu&Shaknov 1949). They SHOULD have opposite polarization. Then, photon A involves in a photoelectric effect. Polarization of A cease to exist. SHOULDN'T the other photon B do the same? To achieve NO polarization...

what happed to the other, if one entangled particle is "destroyed" if one entangled particle is "destroyed" what is the state of the OTHER particle? Situation 1 two entangled particles, A and B(assume have mass). if A is "destroyed", say it hit a wall :). What happen to the B's...