El proceso contra Jato Tello (Vitoria 1485): ¿Error judicial o empleo de la justicia penal en la política antijudía?

[ES]El objeto de este artículo es saber hasta qué punto pudo emplearse la justicia penal como un instrumento más de la política de carácter antijudío desarrollada por las autoridades cristianas de la España medieval a finales del siglo XV, concretamente en los momentos previos a la expulsión. Para indagar sobre esta cuestión se tendrá presente el proceso penal por blasfemia al que fue sometido el judío de Vitoria (Álava) Jato Tello.

Performance analysis of bit error rate for free space optical communication with tip-tilt compensation based on gamma-gamma distribution

In this paper, the gamma-gamma probability distribution is used to model turbulent channels. The bit error rate (BER) performance of free space optical (FSO) communication systems employing on-off keying (OOK) or subcarrier binary phase-shift keying (BPSK) modulation format is derived. A tip-tilt adaptive optics system is also incorporated with a FSO system using the above modulation formats. The tip-tilt compensation can alleviate effects of atmospheric turbulence and thereby improve the BER performance. The improvement is different for different turbulence strengths and modulation formats. In addition, the BER performance of communication systems employing subcarrier BPSK modulation is much better than that of compatible systems employing OOK modulation with or without tip-tilt compensation.

Entanglement purification with higher error threshold for imperfection of local operations and bell state measurements

We analyse further the entanglement purification protocol proposed by Feng et al. (Phys. Lett. A 271 (2000) 44) in the case of imperfect local operations and measurements. It is found that this protocol allows of higher error threshold. Compared with the standard entanglement purification proposed by Bennett et al. [Phys. Rev. Lett. 76 (1996) 722], it turns out that this protocol is remarkably robust against the influences of imperfect local operations and measurements.