Global coherence of quantum evolutions based on decoherent histories: theory and application to photosynthetic quantum energy transport

Assessing the role of interference in natural and artificial quantum dyanamical processes is a crucial task in quantum information theory. To this aim, an appopriate formalism is provided by the decoherent histories framework. While this approach has been deeply explored from different theoretical perspectives, it still lacks of a comprehensive set of tools able to concisely quantify the amount of coherence developed by a given dynamics. In this paper we introduce and test different measures of the (average) coherence present in dissipative (Markovian) quantum evolutions, at various time scales and for different levels of environmentally induced decoherence. In order to show the effectiveness of the introduced tools, we apply them to a paradigmatic quantum process where the role of coherence is being hotly debated: exciton transport in photosynthetic complexes. To spot out the essential features that may determine the performance of the transport we focus on a relevant trimeric subunit of the FMO complex and we use a simplified (Haken-Strobl) model for the system-bath interaction. Our analysis illustrates how the high efficiency of environmentally assisted transport can be traced back to a quantum recoil avoiding effect on the exciton dynamics, that preserves and sustains the benefits of the initial fast quantum delocalization of the exciton over the network. Indeed, for intermediate levels of decoherence, the bath is seen to selectively kill the negative interference between different exciton pathways, while retaining the initial positive one. The concepts and tools here developed show how the decoherent histories approach can be used to quantify the relation between coherence and efficiency in quantum dynamical processes.Comment: 13 papges, 9 figure

Inspiring school design: an architect's perspective

LINK 2016, vol. 2, issue 2 / Copyright 2016 University of HertfordshireFinal Published versio

Blame the victim? Domestic violence as covered in The Sun and The Guardian

This material has been published in The Conversation, November 2016. It is reproduced and made available under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way

Researching Domestic Violence: Findings from a European project on domestic violence and mental health and project on media representations of domestic violence

© 2016 The Author(s). This an open access work distributed under the terms of the Creative Commons Attribution Licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.This presentation outlines an EU funded Daphne III project entitled ‘Empowering Women and Providers: Domestic Violence and Mental Health’ led by the University of Hertfordshire. It describes the key findings from this project and how they provided the stimulus for a second project examining media representations of domestic violence in the UK. Findings from this latter project then follow.Peer reviewe

Recovery approaches in mental health : A qualitative evaluation of the Whole Life Therapy programme for persons with schizophrenia

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International LicenseThe recovery approach within mental health services has in recent years been influential in promoting more active participation from service users concerning their treatment and progress, within a move towards models of interventions based on social models and ideas of service user empowerment. Although mental health recovery models are often heralded as ideological goals, comparatively little has been documented about the means of achieving these. This article sets out the nature and content of the Whole Life Programme, used within the Hertfordshire NHS Partnership Foundation Trust, and the results of qualitative research into the programme that set out to analyse the impact of its delivery from the perspectives of service users. The research examined the experiences and views of participants receiving treatment several months after the completion of the programme, and also of those who withdrew prematurely, in order to learn from these experiences, adding to our understanding of how one recovery based approach, the Whole Life Manual, can be applied in practiceNon peer reviewedFinal Published versio

Treatment outcomes in schizophrenia: qualitative study of the views of family carers

Abstract Background Schizophrenia is a complex, heterogeneous disorder, with highly variable treatment outcomes, and relatively little is known about what is important to patients. The aim of the study was to understand treatment outcomes informal carers perceive to be important to people with schizophrenia. Method Qualitative interview study with 34 individuals and 8 couples who care for a person with schizophrenia/schizoaffective disorder. Interviews were transcribed verbatim and analysed by a thematic framework based approach. Results Carers described well-recognised outcomes of importance, alongside more novel outcomes relating to: Safety (of the patient/others); insight (e.g. into non-reality of psychotic phenomena); respite from fear, distress or pain; socially acceptable behaviour; getting out of the house; attainment of life milestones; changes in personality and/or temperament; reduction of vulnerability to stress; and several aspects of physical health. Conclusions These findings have the potential to inform the development of patient- or carer- focused outcome measures that take into account the full range of domains that carers feel are important for patients. Keywords Schizophrenia Treatment Patient Carer Outcom

Domestic Violence and Education: Examining the Impact of Domestic Violence on Young Children, Children, and Young People and the Potential Role of Schools

This article examines how domestic violence impacts the lives and education of young children, children, and young people and how they can be supported within the education system. Schools are often the service in closest and longest contact with a child living with domestic violence; teachers can play a vital role in helping families access welfare services. In the wake of high profile cases of child abuse and neglect, concerns have been raised about the effectiveness of multi-agency responses to children living with abuse. In the United Kingdom, the case of 4-year-old Daniel Pelka who died in 2012 following abuse and starvation by his mother, who experienced domestic violence, and her partner, led to a serious case review. It found recording systems in Daniel’s school were not used consistently, and details held by different agencies were not collated to enable the formation of a coherent assessment. The lack of integrated working cited in the report echoes findings from previous serious case reviews. A strong correlation exists between domestic abuse and child abuse, with approximately half of all domestic violence situations involving direct child abuse. Children can also be affected indirectly by violence occurring in their home by seeing or hearing it taking place. This article examines the impact of domestic violence on the mental health of children, and the impact on their education. Violence in children’s lives often causes disruption to their schooling and harms the quality of their educational experiences and outcomes. The abuse children experience can result in emotional trauma, physical and psychological barriers to learning, and disruptive behavior in school, while the underlying causes of these problems remain hidden. Knowing when and how to seek advice from multi-agency professionals is an essential part of effective practice among school staff. Despite their vital role in identifying signs of abuse and signposting referral pathways, research indicates teachers often lack confidence and knowledge for such work. The article examines how the professional learning and professional confidence of teachers can be developed, and how recent policy and practice developments in the United Kingdom have the potential to influence work in this area

Quantum Brachistochrone Curves as Geodesics: Obtaining Accurate Minimum-Time Protocols for the Control of Quantum Systems

Most methods of optimal control cannot obtain accurate time-optimal protocols. The quantum brachistochrone equation is an exception, and has the potential to provide accurate time-optimal protocols for a wide range of quantum control problems. So far, this potential has not been realized, however, due to the inadequacy of conventional numerical methods to solve it. Here we show that the quantum brachistochrone problem can be recast as that of finding geodesic paths in the space of unitary operators. We expect this brachistochrone-geodesic connection to have broad applications, as it opens up minimal-time control to the tools of geometry. As one such application, we use it to obtain a fast numerical method to solve the brachistochrone problem, and apply this method to two examples demonstrating its power.National Science Foundation (U.S.) (Project PHY-1005571)United States. Army Research Office. Multidisciplinary University Research Initiative (Grant W911NF-11-1-0268)National Science Foundation (U.S.) (Project CCF-1350397

Understanding the connections between intimate partner domestic violence and mental health within the European context : implications for innovative practice

This material has been published in Dailogue in Praxis: A Social Work International Journal, by the Interuniversity Centre, Dubrovnik, Croatia. Content in the UH Research Archive is made available for personal research, educational, and non-commercial purposes only. Unless otherwise stated, all content is protected by copyright, and in the absence of an open license, permissions for further re-use should be sought from the publisher, the author, or other copyright holder.The article highlights the traumatic impact of Intimate Partner Domestic Violence (IPDV) on women, the complexity of their responses and the connections between IPDV and mental ill health in the European context. Prevalence statistics indicate the scale of both IPDV and of mental ill health among IPDV women victims, as well as highlighting the impact of societal attitudes on disclosure. The paper highlights gaps in existing service responses which seek to break down the barriers preventing women from using services are identified. The potential of applying the new models of recovery being modelled in mental health to women experiencing IPDV is exploredPeer reviewedFinal Published versio

The impact of multiple sclerosis on the identity of mothers in Italy

Purpose: This paper reports on one of the themes that emerged from the analysis of the study, regarding the perceived influence of multiple sclerosis (MS) on the identity of mothers in the socio-cultural context of Italy. Method: In-depth interviews were conducted with 16 women at various stages of MS, with follow up interviews with seven of the women. Phenomenology guided the methodology and the analysis was conducted using interpretative phenomenological analysis. Results: Through the research the value of motherhood to the women who participated emerged. The findings illustrated how many strove to maintain controlof their MS, which led to some making comparisons of themselves and other mothers and feeling different. Some women described how they adjusted their roles and found strength in being mothers but others spoke of their feelings of loss. Most women described living in the moment, appreciating the present and living each day as it came. Another significant experience was fear of stigma, both realized in the form of “pity” from others, and the perceived and actual associated stigma for their families. This contributed to why some women were reluctant to disclose their condition. The mothers who took part in this study differed in how they perceived their disabled identity. Conclusion: Although this study was conducted in the socio-cultural setting of Italy, the findings have implications for professionals working with disabled mothers and women with MS in Italy and beyond; including recognizing the value associated with fully identifying oneself as a mother, rather than solely focusing on doingmothering tasks. • Implications for Rehabilitation • Professionals need to be mindful of the value of motherhood for women with multiple sclerosis. • Professionals should support women who feel like they are battling with maintaining control of their multiple sclerosis, who may be adjusting their identity as mothers; recognizing that they may be influenced by the stage of their multiple sclerosis and whether they were diagnosed before or after having their children. • Women can have feelings of loss related to their ability to fully participate in their children’s lives and professionals should work with women to help them identify the value of their mothering role not only in physically participating in activities but also in being emotionally and physically present as a mother