To explain aspects of the quantum-to-classical transition, quantum Darwinism explores the fact that, due to interactions between a quantum open system and its surrounding environment, information about the system can be spread redundantly to the environment. Here we recall that there are in the literature two distinct and non-equivalent ways to make this statement precise and quantitative. We first point out the difference with some simple but illustrative examples. We then consider a model where Darwinism can be seen from both perspectives. Moreover, the non-Markovianity of our model can be varied with a parameter. In a recent work [F. Galve et al., Sci. Reps. 6, 19607 (2016)], the authors concluded that quantum Darwinism can be hindered by non-Markovianity. We depart from their analysis and argue that, from both perspectives to quantum Darwinism, there is no clear relationship between non-Markovianity and quantum Darwinism in our model. FIG. 1: Three qualitatively distinct possibilities for a partial information plot (PIP). The solid line (a) corresponds to a case where a small fraction of the environment already has average mutual information close to H(S), being the signature of quantum Darwinism. The linear profile (b) can be seen (approximately) in our model for small interaction times (see Sec. V). In profile (c), f δ is close to 0.5, so the redundancy is very small. This kind of profile can be obtained from random pure states drawn according to the Haar measure [13].
Neste trabalho, realizamos uma análise multimodal de dois anúncios publicitários de O Boticário, veiculados na mídia digital Facebook, em junho de 2018, de modo a perceber o gênero como ação social e a intencionalidade publicitária. Metodologicamente, nos valemos de uma análise qualitativa-interpretativa com base nos conceitos de Jewitt (2013) e das camadas do modelo GeM, proposto por Hiipalla (2014), considerando-se a atuação das funções da linguagem de Halliday (2004) presentes nos modos semióticos, partindo de suas considerações sobre a linguagem como um sistema multifuncional, o qual representa a realidade, ordena as relações sociais e estabelece identidades (FAIRCLOUGH, 2001, P.27). Também levamos em conta alguns conceitos de Kress e van Leeuwen (2001 e 2006) e Fairclough (2001), expandidos a partir de Halliday para o modo visual e discursivo. Concluímos que as affordances multimodais do gênero publicitário imprimem significados em camadas individuais e na junção dos conjuntos multimodais na geração de efeitos que incentivam o consumo, interligando produtos ao self, ou seja, à identidade pessoal da consumidora.
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