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Entangled Hbars

Lockable entanglement measures

 contact:  P. Horodecki  date:  15 Mar 2005  last progress:    -    solved by:    -  

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Problem   Background   Literature  

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Problem

Are two-way distillible entanglement and secret key rate lockable?

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Background

An entanglement measure is lockable, if it is extremely sensitive to the loss of a single qubit by one of the partners [HHHO04]. In this paper it is shown that entanglement of formation, entanglement cost, logarithmic negativity, and all convex, asymptotically discontinuous entanglement measures are lockable. More recently [CW05], also squashed entanglement has been shown to be lockable.

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Literature

[HHHO04]K. Horodecki, M. Horodecki, P. Horodecki, J. Oppenheim, »Locking entanglement measures with a single qubit«, quant-ph/0404096 (2004).
[CW05]M. Christandl, A. Winter, »Uncertainty, Monogamy, and Locking of Quantum Correlations«, quant-ph/0501090 (2005).

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