Bell-Correlated Activable Bound Entanglement in Multiqubit Systems

Details Bell-Correlated Activable Bound Entanglement in Multiqubit Systems Bell-Correlated Activable Bound Entanglement in Multiqubit Systems

2004-11-11

arxiv.org/abs/quant-ph/0411082v1

Phys. Rev. A 71, 062317, (2005)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.71.062317

We show that the Hilbert space of even number ($\geq4$) of qubits can always be decomposed as a direct sum of four orthogonal subspaces such that the normalized projectors onto the subspaces are activable bound entangled (ABE) states. These states also show a surprising recursive relation in the sense that the states belonging to $2N+2$ qubits are Bell correlated to the states of $2N$ qubits; hence, we refer to these states as Bell-Correlated ABE (BCABE) states. We also study the properties of noisy BCABE states and show that they are very similar to that of two qubit Bell-diagonal states.

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