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Stoklasa, B. ; Motka, L. ; ?ehá?ek, J. ; Hradil, Z. ; Sánchez Soto, Luis Lorenzo ; Agarwal, G. S. | IOP Publishing | 2015-11Optical beams with topological singularities have a Schmidt decomposition. Hence, they display features typically associated with bipartite quantum systems; in particular, these classical beams can exhibit entanglement. This classical entangleme[...]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
Harder, G. ; Silberhorn, Ch. ; Rehacek, J. ; Hradil, Z. ; Motka, L. ; Stoklasa, B. ; Sánchez Soto, Luis Lorenzo | American Physical Society | 2016-03-30We report the experimental point-by-point sampling of the Wigner function for nonclassical states created in an ultrafast pulsed type-II parametric down-conversion source. We use a loss-tolerant time-multiplexed detector based on a fiber-optical[...]texto impreso
?ehá?ek, Jaroslav ; Hradil, Z. ; Koutny, D. ; Grover, J. ; Krzic, A. ; Sánchez Soto, Luis Lorenzo | American Physical Society | 2018-07-03We construct optimal measurements, achieving the ultimate precision predicted by quantum theory, for the simultaneous estimation of centroid, separation, and relative intensities of two incoherent point sources using a linear optical system. We [...]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
Teo, Y. S. ; Müller, C. R. ; Jeong, H. ; Hradil, Z. ; ?ehá?ek, J. ; Sánchez Soto, Luis Lorenzo | Amer Physical Soc | 2017-04-17We examine the moment-reconstruction performance of both the homodyne and heterodyne (doublehomodyne) measurement schemes for arbitrary quantum states and introduce moment estimators that optimize the respective schemes for any given data. In th[...]texto impreso
Harder, Georg ; Silberhorn, C. ; ?ehá?ek, Jaroslav ; Hradil, Z. ; Motka, L. ; Stoklasa, B. ; Sánchez Soto, Luis Lorenzo | American Physical Society | 2014-10-07We report the experimental reconstruction of the statistical properties of an ultrafast pulsed type II parametric down-conversion source in a periodically poled potassium titanyl phosphate waveguide at telecom wavelengths, with almost perfect ph[...]
