Bob and Alice with a Bell pair

[Heidi]

Hi Pfs
If Bob and Alice share a bell pair 0>0> + 1>1>
I cannot remember , how Alice compute the density matrix of hes own particle.
thanks.

 

[pines-demon]

Hi Pfs
If Bob and Alice share a bell pair 0>0> + 1>1>
I cannot remember , how Alice compute the density matrix of hes own particle.
thanks.

This is PF, we ask you to first look it up and show us what you have done so far before commenting on it.

 

[Heidi]

I remember that we wrote a 4 by matrix in a set of 4 by 4 matrix
and summing for ech ons 2 values and getting what Alice density matrix has.
I had a stroke in my brain 2 months ago and i still have problems.
µ

 

[pines-demon]

I remember that we wrote a 4 by matrix in a set of 4 by 4 matrix
and summing for ech ons 2 values and getting what Alice density matrix has.
I had a stroke in my brain 2 months ago and i still have problems.
µ

Again it is not about what you remember but what effort have you done so far. Have you look up for "density matrix and entanglement"?