0512154v2

related topics
{let, theorem, proof}
{equation, function, exp}
{group, space, representation}
{entanglement, phys, rev}
{state, phys, rev}
{states, state, optimal}
{operator, operators, space}
{error, code, errors}
{phase, path, phys}
{cos, sin, state}

A concise guide to complex Hadamard matrices

Wojciech Tadej, Karol Zyczkowski

abstract: Complex Hadamard matrices, consisting of unimodular entries with arbitrary phases, play an important role in the theory of quantum information. We review basic properties of complex Hadamard matrices and present a catalogue of inequivalent cases known for dimension N=2,...,16. In particular, we explicitly write down some families of complex Hadamard matrices for N=12,14 and 16, which we could not find in the existing literature.

oai_identifier:
oai:arXiv.org:quant-ph/0512154
categories:
quant-ph math.CO math.RA
comments:
56 pages, no figures, an updated on line version at http://chaos.if.uj.edu.pl/~karol/hadamard/
arxiv_id:
quant-ph/0512154
journal_ref:
Open Syst. Inf. Dyn. 13, 133-177 (2006)
created:
2005-12-19
updated:
2006-05-25

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