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Björk, G. ; de Guise, H. ; Klimov, A.B. ; Hoz Iglesias, Pablo de la ; Sánchez Soto, Luis Lorenzo | American Physical Society | 2014-07-23We put forward an operational degree of polarization that can be extended in a natural way to fields whose wave fronts are not necessarily planar. This measure appears as a distance from a state to the set of all of its polarization-transformed [...]texto impreso
Un buen número de experimentos recientes han demostrado que la luz presenta muchas propiedades que no se pueden explicar de acuerdo con la teoría clásica y deben tratarse en el contexto de la óptica cuántica. Este es el objetivo básico de la pre[...]texto impreso
Björk, G. ; Klimov, A. B. ; Hoz Iglesias, Pablo de la ; Grassl, M. ; Leuchs, G. ; Sánchez Soto, Luis Lorenzo | American Physical Society | 2015-09-01The characterization of quantum polarization of light requires knowledge of all the moments of the Stokes variables, which are appropriately encoded in the multipole expansion of the density matrix. We look into the cumulative distribution of th[...]texto impreso
Hradil, Z. ; ?ehá?ek, J. ; Hoz Iglesias, Pablo de la ; Leuchs, G. ; Sánchez Soto, Luis Lorenzo | American Physical Society | 2015-04-27Rotated quadratures carry the phase-dependent information of the electromagnetic field, so they are somehow conjugate to the photon number. We analyze this noncanonical pair, finding an exact uncertainty relation, as well as a couple of weaker i[...]texto impreso
Quantum metrology allows for a tremendous boost in the accuracy of measurement of diverse physical parameters. The estimation of a rotation constitutes a remarkable example of this quantum-enhanced precision. The recently introduced Kings of Qua[...]texto impreso
Karimi, E. ; Boyd, R.W. ; Hoz Iglesias, Pablo de la ; de Guise, H. ; ?ehá?ek, J. ; Hradil, Z. ; Aiello, A. ; Leuchs, G. ; Sánchez Soto, Luis Lorenzo | American Physical Society | 2014-06-16We introduce an operator linked with the radial index in the Laguerre-Gauss modes of a two-dimensional harmonic oscillator in cylindrical coordinates. We discuss ladder operators for this variable, and confirm that they obey the commutation rela[...]texto impreso
Hoz Iglesias, Pablo de la ; Björk, G. ; Klimov, A. B. ; Leuchs, G. ; Sánchez Soto, Luis Lorenzo | American Physical Society | 2014-10-15We capitalize on a multipolar expansion of the polarization density matrix, in which multipoles appear as successive moments of the Stokes variables. When all the multipoles up to a given order K vanish, we can properly say that the state isKth-[...]
