Bell-correlated activable bound entanglement in multiqubit systems

Journal Article · Wed Jun 15 00:00:00 EDT 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.71.062317· OSTI ID:20717882

Bandyopadhyay, Somshubhro; Chattopadhyay, Indrani; Roychowdhury, Vwani; Sarkar, Debasis ^[1]

---

1. Centre for Quantum Information and Quantum Control and Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6 (Canada)

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.

• OSTI ID: 20717882
• Journal Information: Physical Review. A, Vol. 71, Issue 6; Other Information: DOI: 10.1103/PhysRevA.71.062317; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BELL THEOREM
BOUND STATE
DATA TRANSMISSION
HILBERT SPACE
QUANTUM ENTANGLEMENT
QUBITS