Hello,
i read about "Bipartite Coherence". In different Papers e.g. http://quantumcorrelations.weebly.com/uploads/6/6/5/5/6655648/2015_badhonnef_activations_cde.pdf or https://arxiv.org/abs/1611.00413
Can someone explain it a little bit? Maybe with an example with 2 Electrons that are described...
No problem. With --> (incoherent states) "states which can't be written as a state vectors / wave functions. You need so-called density matrices to describe them." - i have the answer i want! :wink:
I was thinking this is a superpostion of spin up/down [x,y,z]. hmmmmmm... :cry:
can there only be a superpostion of e.g. spin up/down [x] but no superpostion of spin up/down [x] AND spin up/down [y] ... (...)
OK.
E.g. i have an single photon or electron --> then it always can "be written as a state vectors / wave functions" & is never a mixed state.
True?
E.g. i have two photons, not entangled --> then this is always a mixed state?
Hello,
can someone give an example for an incoherent State --> a formula is here on page 7 : http://quantumcorrelations.weebly.com/uploads/6/6/5/5/6655648/2016_robustnessofcoherencetalk.pdf
I know that coherenc is e.g. a superposition of e.g. Spin-Up and Spin-Down [z] or so...
But i have no...