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Completely mixed state is a critical point for three-qubit entanglement
Completely mixed state critical point three-qubit entanglement
2010/11/5
Pure three-qubit states have five algebraically independent and one algebraically dependent polynomial invariants under local unitary transformations and an arbitrary entanglement measure is a functi...
Testing nonlocality over 12.4 km of underground fiber with universal time-bin qubit analyzers
Testing nonlocality time-bin qubit analyzers
2010/3/10
We experimentally demonstrate that the nonlocal nature of time-bin entangled photonic qubits persists when one or two qubits of the pair are converted to polarization qubits. This is possible by imple...
Local symmetry properties of pure 3-qubit states
Local symmetry properties pure 3-qubit states
2010/10/15
Entanglement types of pure states of three spin- 1 2 particles are classified by means of their stabilisers in the group of local unitary transformations. It is shown that the stabiliser is genericall...