Bounds on entanglement in qudit subsystems

Physical Review A - Atomic, Molecular, and Optical Physics

Volumn 66, Issue 6, 2002, Pages 623101-623107

  Kendon, Vivien M ^a   Zyczkowski, Karol ^b   Munro, William J ^c  

^a IMPERIAL COLLEGE LONDON   (United Kingdom)

^b CENTER FOR THEORETICAL PHYSICS   (Poland)

^c HEWLETT PACKARD LABORATORIES   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

APPROXIMATION THEORY; COMPUTATIONAL METHODS; ENTROPY; MATHEMATICAL OPERATORS; MATRIX ALGEBRA; PROBABILITY DISTRIBUTIONS; QUANTUM THEORY;

QUDIT SUBSYSTEMS;

QUANTUM OPTICS;

EID: 0036994853     PISSN: 10502947     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

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39. ent is at the boundary of the maximal ball (PPT implies separable in this case, see also Ref. [30]), which is why the exact results for the bounds for two qubits are the same [right-hand side of Eqs. (8) and (13) are equal]. But this isn't so for d>2 or m>2, hence we get a different value for the bound from this method, in general. The states in between are maximally entangled mixed states, see, Refs. [35-37].
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