104 citations · 788 across the 41 of their papers we have counts for
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quant-ph2009★ 40 cited
Factorization and entanglement in general XYZ spin arrays in non-uniform transverse fields
R. Rossignoli, N. Canosa, J. M. Matera
We determine the conditions for the existence of a pair of degenerate parity breaking separable eigenstates in general arrays of arbitrary spins connected through couplings o…
cond-mat.stat-mech2009★ 10 cited
Majorization properties of generalized thermal distributions
N. Canosa, R. Rossignoli, M. Portesi
We examine the majorization properties of general thermal-like mixed states depending on a set of parameters. Sufficient conditions which ensure the increase in mixedness, and henc…
quant-ph2009★ 17 cited
Entanglement between distant qubits in cyclic XX chains
N. Canosa, R. Rossignoli
We evaluate the exact concurrence between any two spins in a cyclic XX chain of n spins placed in a uniform transverse magnetic field, both at zero and finite temperature, by means…