entanglement.h File Reference

A small selection of Entanglement measures for density operators. More...

#include "matrix.h"
#include "mlapack.h"

Go to the source code of this file.

Functions
DLL_EXPORT double	Tangle (Matrix< complex< double > >)
	The tangle for an arbitrary to-qubit density matrix as defined by Wootters et al (ref).
DLL_EXPORT double	ITangle (Matrix< complex< double > >, int)
	The ITangle as defined by Rungta et al (ref).
DLL_EXPORT double	ITangle2 (Matrix< complex< double > >, int)
	The ITangle for arbitrary rank-2 density matrices using the formula found by Osborne.
DLL_EXPORT Matrix< complex< double > >	StateInvert (Matrix< complex< double > >, int)
DLL_EXPORT double	Entropy (Matrix< complex< double > >)
	The Von Neumann entropy (ambiguously named) for a density matrix.
double	mutual_information (Matrix< complex< double > >, int)

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Detailed Description

The precise definition of entanglement is an unsolved problem in quantum information. One useful measure is the Entanglement of Formation (ref) , the Tangle, ITangle.

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