S. Shelly Sharma, N. K. Sharma
Published 2009-12-22Version 1
An expression for four-tangle is obtained by examining the negativity fonts present in a four-way partial transpose under local unitary operations. An alternate derivation of three tangle is also given.
Comments: 5 pages, No figures
Journal: Phys. Rev. A 82, 012340 (2010)
Unitary Invariants and Classification of Four-Qubit States via Negativity Fonts
Quantifying non-classicality with local unitary operations
A classification of entanglement in three-qubit systems
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