Analysis of motivative components of sexual behavior in man with chronic prostatitis

The objective: to analyze the motivational component of sexual behavior in chronic prostatitis (CP) men. 109 CP patients were examined. The clinical picture of CP in all persons under examination was accompanied by impaired sexual function, in 70 (64.2%) patients it was presented with variations of erectile dysfunction (ED), in 39 (35.8%) – with combined lesions of erectile and ejaculatory function. Preliminary sexual examination allowed to establish that all of the examined had disorders of the rate of psychosexual development, and patients with ED were diagnosed with simple forms of asynchrony, which were formed due to the isolated action of one somatogenically conditioned factor, and in patients with sexual intercourse the emergence of which was facilitated by the combined action of several pathogenic factors. ED and simple forms of asynchrony of psychosexual development persons formed study group 1 (group 1), and patients with combined sexual dysfunction and combined forms of asynchrony formed group 2 (group 2). Motivational models of sexual behavior inherent in CP men was identified.Persons with pattern-regulated, homeostabilizing and passive-submissive types of sexual motivation, the leading motive for sexual activity for which was the duty fulfillment, were attributed to the template-stereotype model (37.1% of group 1 and 30.8% of group 2, p> 0.05). Men with a promotional model had pattern-regulated and passive-submissive sexual motivation, and the realization of reproductive function as a leading motive for sexual life (18.6% of group 1 and 30.8% of group 2, p <0.05). The compensatory model of sexual behavior united individuals with aggressive selfishness, genital and passive-submissive types of sexual motivation with a leading motive for using sexual relations as a means of self-affirmation (14.3% of group 1 and 17.9% of group 2, p> 0.05). Recreational models were matched by a mutually altruistic communicative-hedonic sexual motivation with the desire to reach orgasm and to enjoy the partner as a motive for sexual activity (12.9% of group 1 and 12.8% of group 2, p> 0.05). The communication motivational model was characterized by sexual motivation and communication as a motive for sexual intercourse (12.9% of group 1 and 5.1% of group 2, p <0.05). The least represented was the relaxation model of sexual behavior, which united individuals with a homeostabilizing type of sexual motivation and motive for sexual intercourse as a means of relaxation (4.3% of group 1 and 2.6% of group 2, p> 0.05). The data obtained need to be taken into account when constructing a scheme of complex treatment of patients with CP

Dispersion spreading of polarization-entangled states of light and two-photon interference

We study the interference structure of the second-order intensity correlation function for polarization-entangled two-photon light obtained from type-II collinear frequency-degenerate spontaneous parametric down-conversion (SPDC). The structure is visualised due to the spreading of the two-photon amplitude as two-photon light propagates through optical fibre with group-velocity dispersion (GVD). Because of the spreading, polarization-entangled Bell states can be obtained without any birefringence compensation at the output of the nonlinear crystal; instead, proper time selection of the intensity correlation function is required. A birefringent material inserted at the output of the nonlinear crystal (either reducing the initial o-e delay between the oppositely polarized twin photons or increasing this delay) leads to a more complicated interference structure of the correlation function.Comment: Extended version of our recent PRL paper. Submitted to PR

Two-Photon Polarization Interference for Pulsed SPDC in a PPKTP Waveguide

We study the spectral properties of Spontaneous Parametric Down Conversion in a periodically poled waveguided structure of KTP crystal pumped by ultra-short pulses. Our theoretical analysis reveals a strongly multimode and asymmetric structure of the two-photon spectral amplitude for type-II SPDC. Experimental evidence, based on Hong-Ou-Mandel polarization interference with narrowband filtering, confirms this result.Comment: Submitted for publicatio

Dispersion spreading of biphotons in optical fibres and two-photon interference

We present the first observation of two-photon polarization interference structure in the second-order Glauber's correlation function of two-photon light generated via type-II spontaneous parametric down-conversion. In order to obtain this result, two-photon light is transmitted through an optical fibre and the coincidence distribution is analyzed by means of the START-STOP method. Beyond the experimental demonstration of an interesting effect in quantum optics, these results also have considerable relevance for quantum communications.Comment: Accepted for publication in Phys.Rev.Let