Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

I How Entanglement works

  1. Dec 29, 2016 #1
    Hello Everyone,
    I would like to understand entanglement a little more clearly. My understanding is that two or more quanta (for example photons) that are entangled become a single entity. Entangled or not, there is always a single and total wavefunction that describes the system but in the case of entanglement the total wavefunction describing the particles cannot be factored. Is that correct? What does that really mean?

    Is it possible for some of system observables to become entangled while other observables remain untangled? How does that happen? Or do all the observables of each individual particle become entangled?

  2. jcsd
  3. Dec 29, 2016 #2


    User Avatar
    Science Advisor
    Gold Member

    You are correct that entangled systems cannot be factored. It is correct that particles may be entangled on some bases, but not entangled on all bases. Photons could be entangled as to frequency or momentum, but not as to polarization, for example.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted