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Müller, C. R. ; Peuntinger, P. ; Dirmeier, T. ; Khan, I. ; Vogl, U. ; Leuchs, G. ; Sánchez Soto, Luis Lorenzo ; Teo, Y. S. ; Hradil, Zdenek ; ?ehá?ek, J. | American Physical Society | 2016-08-11The accuracy in determining the quantum state of a system depends on the type of measurement performed. Homodyne and heterodyne detection are the two main schemes in continuous-variable quantum information. The former leads to a direct reconstru[...]texto impreso
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
?ehá?ek, J. ; Stoklasa, Bohumil ; Koutný, Dominik ; Hradil, Zdenek ; Sánchez Soto, Luis Lorenzo | The American Physical Society | 2019-11-07We derive fundamental precision bounds for single-point axial localization. For Gaussian beams, this ultimate limit can be achieved with a single intensity scan, provided the camera is placed at one of two optimal transverse detection planes. He[...]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[...]
