13 citations · 13 across the 2 of their papers we have counts for
3 papers
math.CO2009
Rational Orthogonal versus Real Orthogonal
Dragomir Z. Djokovic, Simone Severini, Ferenc Szollosi
The main question we raise here is the following one: given a real orthogonal n by n matrix X, is it true that there exists a rational orthogonal matrix Y having the same zero-patt…
math.CO2006
Parametrizing Complex Hadamard Matrices
Ferenc Szöllosi
The purpose of this paper is to introduce new parametric families of complex Hadamard matrices in two different ways. First, we prove that every real Hadamard matrix of order N>=4…
quant-ph2006★ 13 cited
State tomography for two qubits using reduced densities
D. Petz, K. M. Hangos, A. Szanto +1
The optimal state determination (or tomography) is studied for a composite system of two qubits when measurements can be performed on one of the qubits and interactions of the two…