Bell-correlated activable bound entanglement in multiqubit systems
- Author(s): Bandyopadhyay, S
- Chattopadhyay, I
- Roychowdhury, Vwani
- Sarkar, D
- et al.
We show that the Hilbert space of even number (>= 4) 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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