Fermionic reaction coordinates and their application to an autonomous Maxwell demon in the strong coupling regime

We establish a theoretical method which goes beyond the weak coupling and Markovian approximations while remaining intuitive, using a quantum master equation in a larger Hilbert space. The method is applicable to all impurity Hamiltonians tunnel-coupled to one (or multiple) baths of free fermions. The accuracy of the method is in principle not limited by the system-bath coupling strength, but rather by the shape of the spectral density and it is especially suited to study situations far away from the wide-band limit. In analogy to the bosonic case, we call it the fermionic reaction coordinate mapping. As an application we consider a thermoelectric device made of two Coulomb-coupled quantum dots. We pay particular attention to the regime where this device operates as an autonomous Maxwell demon shoveling electrons against the voltage bias thanks to information. Contrary to previous studies we do not rely on a Markovian weak coupling description. Our numerical findings reveal that in the regime of strong coupling and non-Markovianity, the Maxwell demon is often doomed to disappear except in a narrow parameter regime of small power output.Comment: 18 pages incl. references, appendix and 10 figures; accepted versio

Higher Calorie Intakes Related to Higher Incomes in Northern Mozambique

Resultados das investigações do Departamento de Análise de Políticas MAP-Direcção de Economíafood security, food policy, Mozambique, food consumption, Food Consumption/Nutrition/Food Safety, Q18,

Reflections on Poverty and Prospects for Growth in the Mozambican Rural Sector

Community/Rural/Urban Development, Food Security and Poverty, Downloads July 2008-July 2009: 10,

What Makes Agricultural Intensification Profitable for Mozambican Smallholders? An Appraisal of the Inputs Subsector and the 1996/97 DNER/SG2000 Program

This report summarizes an appraisal of input utilization and marketing in Mozambique, focusing on the following research questions: (1) What are current smallholder yields for major commodities, and what is the potential for increasing yields through the use of improved technologies? (2) To what extent are improved technologies already being used by smallholders, and is the use of improved technologies profitable? (3) How are improved seeds, fertilizer and pesticides currently produced and distributed? and (4) What are the key constraints and opportunities for increasing the use of improved technologies by smallholders?food security, food policy, improved technologies, Farm Management, Downloads July 2008-July 2009: 9, O31,

Is Agricultural Intensification Profitable For Mozambican Smallholders? An Appraisal of the Inputs Subsector and the 1996/97 DNER/Sg2000 Program

Farm Management, Downloads July 2008-June 2009: 5,

What Makes Agricultural Intensification Profitable for Mozambican Smallholders? An Appraisal of the Inputs Subsector and the 1996/97 DNER/SG2000 Program, Volume II: Main Report

Ministry of Agriculture and Rural Development, Directorate of Economics, Republic of Mozambiquefood security, food policy, Mozambique, agriculture, Farm Management, Q18,

His Dream of Passion: Reflections on the work of Lee Strasberg and his influence on British Actor Training (Part Two)

A previous article for Stanislavski Studies (Vol. 4, No 1, 47-62) explored and examined the impact of Lee Strasberg’s Emotion Memory technique and assessed its influence on contemporary approaches to British actor training. This second ‘companion’ article reflects on a much broader range of Strasbergian training techniques in order, initially, to examine their efficacy and to highlight the extent to which they have been absorbed and adapted by acting teachers working in a British training context. Often viewed as a controversial figure - both in the United Kingdom and in the United States - Strasberg’s approach has frequently been vilified and dismissed. This is particularly true of his interpretation of Stanislavski’s Emotion Memory technique. Whereas the earlier article sought to arrive at an informed and balanced view of his deployment of this technique, what follows is an attempt to review other aspects of Strasberg’s work so as to evaluate the coherence and credibility of the assumptions on which his approach was based and to test whether his work remains appropriate and viable in British training environments today. His work on Relaxation, Concentration and Sense Memory will be examined alongside his development of the Private Moment, Song and Dance and Animal exercises. What, if anything, can we learn from Strasberg’s Method-based approach to actor training and how might we begin to consider the impact and unity of his work as a whole as opposed to focusing almost exclusively on his early work on Emotion Memory

Algumas Reflexões sobre a Pobreza e as Perspectivas para o Crescimento do Sector Rural de Moçambique

Resultados das investigações do Projecto de Segurança Alimentar em Moçambique MAP-Direcção de Economíafood security, food policy, Mozambique, Community/Rural/Urban Development, Food Security and Poverty, Q18,

Hierarchical Equations of Motion Approach to Quantum Thermodynamics

We present a theoretical framework to investigate quantum thermodynamic processes under non-Markovian system-bath interactions on the basis of the hierarchical equations of motion (HEOM) approach, which is convenient to carry out numerically "exact" calculations. This formalism is valuable because it can be used to treat not only strong system-bath coupling but also system-bath correlation or entanglement, which will be essential to characterize the heat transport between the system and quantum heat baths. Using this formalism, we demonstrated an importance of the thermodynamic effect from the tri-partite correlations (TPC) for a two-level heat transfer model and a three-level autonomous heat engine model under the conditions that the conventional quantum master equation approaches are failed. Our numerical calculations show that TPC contributions, which distinguish the heat current from the energy current, have to be take into account to satisfy the thermodynamic laws.Comment: 9 pages, 4 figures. As a chapter of: F. Binder, L. A. Correa, C. Gogolin, J. Anders, and G. Adesso (eds.), "Thermodynamics in the quantum regime - Recent Progress and Outlook", (Springer International Publishing