= Entanglement depth
{wiki=Entanglement_depth}
Entanglement depth is a concept in quantum information theory that refers to the extent or degree of entanglement within a quantum system. It provides a measure of how many layers or levels of entanglement are present when considering a quantum state, particularly in composite systems formed by multiple subsystems (or parties). In a more specific context, entanglement depth can be associated with quantum states that are generated through a sequence of operations, such as measurements or unitary transformations.
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