B Quantum Entanglement in Practice

Pixelex
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How is quantum entanglement done in practice for different particles with different properties eg. spin, polarization, etc.? Why is entanglement useful for quantum circuits?

*I am curious about how they are actually entangled and used. I don't know how is entanglement applied in practice so I don't know why people mention it is useful for quantum computing.*
 
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Pixelex said:
How is quantum entanglement done in practice for different particles with different properties eg. spin, polarization, etc.?
For production of entangled photons see e.g. spontaneous parametric down-conversion (SPDC).
 
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