1302.2212 (Wen-Chao Qiang et al.)

Entanglement of formation for qubit-qudit system using partition of
qudit sytem into a set of qubit system    [PDF]

Wen-Chao Qiang, W. B. Cardoso

Gerjuoy [Phys. Rev. A 67, 052308 (2003)] has derived a closed- form lower bound for the entanglement of formation of a mixed qubit-qudit system (qudit system has d levels with d>=3. In this paper, inspired by Gerjuoy's method, we propose a scheme that partitions a qubit-qudit system into d(d-1)/2 qubit-qubit systems, which can be treated by all known methods pertinent to qubit-qubit system. The method is demonstrated by a qubit-qudit system (The levels of qudit are d=3 and d=5, respectively)

View original: http://arxiv.org/abs/1302.2212