Abstract
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).
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This work is supported by the Special Funds for Theoretical Physics of the National Natural Science Foundation of China (Grant No. 11147161). The partial support by the CNPq and INCT-IQ (WBC) are also acknowledged.
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Qiang, WC., Cardoso, W.B. Entanglement of Formation for Qubit-Qudit System Using Partition of Qudit System into a Set of Qubit System. Int J Theor Phys 53, 2024–2032 (2014). https://doi.org/10.1007/s10773-014-2008-x
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DOI: https://doi.org/10.1007/s10773-014-2008-x