Mixed-state certification of quantum capacities for noisy communication channels

We extend a recent method to detect lower bounds to the quantum capacity of quantum communication channels by considering realistic scenarios with general input probe states and arbitrary detection procedures at the output. Realistic certification relies on a new bound for the coherent information of a quantum channel that can be applied with arbitrary bipartite mixed input states and generalized output measurements.Comment: 7 pages, 2 figure

Detection of properties and capacities of quantum channels

We review in a unified way a recently proposed method to detect properties of unknown quantum channels and lower bounds to quantum capacities, without resorting to full quantum process tomography. The method is based on the preparation of a fixed bipartite entangled state at the channel input or, equivalently, an ensemble of an overcomplete set of single-system states, along with few local measurements at the channel output.Comment: 8 pages, 1 figure. arXiv admin note: text overlap with arXiv:1510.0021

Evaluating the efficacy of psychodynamic treatment on a single case of autism. A qualitative research.

Autism spectrum disorder refers to a group of diseases determined by multiple conditions and primarily defined on the basis of behavioral patterns. The literature and guidelines provide indications regarding adequate treatments, underlying how psychologically and behaviorally structured interventions, should be considered the best programs. Anyway, there is still a scarcity of studies evidencing the effectiveness of therapeutic and developmental approaches situated in a psychodynamic framework and researches aimed to evaluate the quality of psychodynamic interventions on autism are rare. The present study illustrate a qualitative research on the single-case intervention with an autistic adolescent, admitted to the Educational - Rehabilitation Centre Antenna 112. The Centre bases its intervention on a specific psychodynamic approach, Lacanian Psychoanalysis, named Pratique \ue0 Plusieurs. The efficacy of the psychodynamic intervention is evaluated by monitoring the therapeutic process with the adolescent from his admission. The evaluation took place in three different stages of the intervention: at the beginning of the treatment, after 6 months and after 12 months. In particular, the level of adaptive behaviors (Vineland Adaptive Behavior Scale), Social Communication (Social Communication Questionnaire), and the seriousness of behavioral patterns, specific for the autism disorders (Childhood Autism Rating Scale) have been assessed. Results highlight that the psychodynamic setting of the Centre and the therapeutic intervention, which takes place in it, foster an improvement of adaptive behavior, such as life skills and socialization. Limitations of the present study and clinical implications regarding residential psychodynamic treatments in cases of autism disorders are discussed

Italian translation and cross cultural comparison with the Childhood Attachment and Relational Trauma Screen (CARTS)

Background: The Childhood Attachment and Relational Trauma Screen (CARTS) is a computer-administered survey designed to assess retrospectively the socio-ecological context in which instances of child abuse may have occurred. To date, studies supporting the validity of the CARTS have only been undertaken in English-speaking North American populations. Validation projects in other countries and cross-cultural comparisons are therefore warranted. Objective: Develop and preliminarily evaluate the psychometric properties of an Italian version of the CARTS on college students and compare such observations to data acquired from Canadian students. Method: Seventy-nine undergraduate students from the University of Padua (Italy) completed an Italian translation of the CARTS as well as measures of childhood experiences, mental health and attachment, responses to which were compared to those obtained in 288 Canadian students who completed the CARTS in English. Results: Internal consistency and convergent validity with the Childhood Trauma Questionnaire and Parental Bonding Instrument were found to be acceptable for the Italian translation. Within the Italian sample, correlation analyses suggested that CARTS Mother ratings referring to attachment and abuse were associated with romantic attachment, whereas CARTS Father ratings were significantly correlated to PTSD symptoms and other symptoms of psychopathology-distress. Significant differences between Italian and Canadian students across the relationship types for the CARTS abuse and attachment scales were found, indicating that Italian students rated their mothers and fathers as simultaneously less abusive, but also less as a source of secure attachment. Conclusions: The results of this preliminary study seem to suggest convergent validity of the Italian CARTS and the association between childhood attachment-related experiences and romantic attachment. Cultural variations were identified between Canadian and Italian students in both attachment and abuse scales. Future studies to investigate cross-cultural variations in the relational context of childhood abuse and in order to boost Italian CARTS psychometric features are warranted

Childhood Traumatic Experiences and Post-Traumatic Stress Disorder in Female Adults: Which is the Role Played by Romantic Attachment?

Childhood traumatic experiences are known to have strong and durable effects on physical, mental and reproductive health. One of the most studied consequences of childhood trauma is the post-traumatic stress disorder (PTSD). The present study aims to investigate in a community sample of Italian female students: (1) the prevalence of PTSD; (2) the association between reported childhood traumatic experiences and the presence of PTSD in adulthood and the role played by the romantic attachment (anxiety, avoidance) on the relationship between childhood traumatic experiences and PTSD symptoms. Three hundred and twenty-seven female Italian students (mean age = 23.09 years; SD = 2.98) of the University of Padova participated in the study. Participants have been tested on childhood traumatic experiences (Childhood Trauma Questionnaire-Short Form, CTQ-SF); romantic attachment (Experience in Close Relationship-Revised, ECR-R) and post-traumatic stress disorder (Post-traumatic Stress Disorder Checklist for DSM-5, PCL-5). Results show that PTSD symptoms are significantly predicted by the experiences of emotional abuse and neglect. Moreover, anxiety and avoidance play a significant role in the relationship between the emotional forms of traumatic experiences and the current presence of PTSD symptoms. Clinical implications for the treatment of PTSD patients with history of interpersonal trauma are discussed

The Role of Father Involvement and Marital Satisfaction in the Development of Family Interactive Abilities: A Multilevel Approach.

The study aims to investigate the development of family interactions from pregnancy to preschool age in a longitudinal perspective, using multilevel analysis. Also, it explored the impact of couple relationship and father involvement in childcare on the developmental trend of the quality of mother\u2013father\u2013child interactions. One hundred and three primiparous families were assessed at 7th month of pregnancy, 4th, 9th, and 18th months of child\u2019s life and during preschool age (36\u201348th), using the observational procedure named, Lausanne Trilogue Play. Parents\u2019 perception of marital satisfaction was assessed with the Dyadic Adjustment Scale at each point of measure; moreover, in the postnatal assessment, parents completed the Father Involvement Questionnaire. Results showed that family interactions increase over time. Secondly, a decrease of marital adjustment is associated with an improvement of the quality of family interactions. Moreover, father involvement predicts the quality of family interactions from the earliest stages of child\u2019s life. In a longitudinal perspective, family interactions and marital quality show opposite developmental trends and father\u2019s involvement represents a particularly important feature of the family

Efficient accessible bounds to the classical capacity of quantum channels

We present a method to detect lower bounds to the classical capacity of quantum communication channels by means of few local measurements (i.e. without complete process tomography), reconstruction of sets of conditional probabilities, and classical optimisation. The method does not require any a priori information about the channel. We illustrate its performance for significant forms of noisy channels.Comment: 10 pages; minor correction

Experimental detection of quantum channel capacities

We present an effcient experimental procedure that certifies non vanishing quantum capacities for qubit noisy channels. Our method is based on the use of a fixed bipartite entangled state, where the system qubit is sent to the channel input. A particular set of local measurements is performed at the channel output and the ancilla qubit mode, obtaining lower bounds to the quantum capacities for any unknown channel with no need of a quantum process tomography. The entangled qubits have a Bell state configuration and are encoded in photon polarization. The lower bounds are found by estimating the Shannon and von Neumann entropies at the output using an optimized basis, whose statistics is obtained by measuring only the three observables $\sigma_{x}\otimes\sigma_{x}$, $\sigma_{y}\otimes\sigma_{y}$ and $\sigma_{z}\otimes\sigma_{z}$.Comment: 5 pages and 3 figures in the principal article, and 4 pages in the supplementary materia

Problematic Internet Use in early adolescence: The role of attachment and negative beliefs about worry

AbstractBackground and aimsProblematic Internet Use (PIU) might be a potential mental health problem. Few studies have investigated the relative contribution of individual and family factors in the development of PIU in early adolescence. The aim of the current study was to model the relationship between attachment styles, negative beliefs about worry, and PIU in early adolescence.MethodsFive hundred and thirty-eight Italian early adolescents (51% females, M age = 12.7 years, SD = 0.87) were included in this study. The pattern of relationships specified by the theoretical model was examined through path analysis.ResultsResults showed that avoidance (mother) and anxiety (father) were directly associated with PIU. Anxiety (mother) and avoidance (father) were indirectly associated with PIU via negative beliefs about worry.Discussion and conclusionsOverall, our findings show that attachment toward mother and father are differently linked to PIU and that negative beliefs about worry may play a mediating role in the association between attachment and PIU. Findings are discussed within clinical and preventive implications