A Geological Itinerary Through the Southern Apennine Thrust-Belt (Basilicata—Southern Italy)

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Optical Magnetometry

Some of the most sensitive methods of measuring magnetic fields utilize interactions of resonant light with atomic vapor. Recent developments in this vibrant field are improving magnetometers in many traditional areas such as measurement of geomagnetic anomalies and magnetic fields in space, and are opening the door to new ones, including, dynamical measurements of bio-magnetic fields, detection of nuclear magnetic resonance (NMR), magnetic-resonance imaging (MRI), inertial-rotation sensing, magnetic microscopy with cold atoms, and tests of fundamental symmetries of Nature.Comment: 11 pages; 4 figures; submitted to Nature Physic

Pig towers and in vitro meat: Disclosing moral worlds by design

Technology development is often considered to obfuscate democratic decision-making and is met with ethical suspicion. However, new technologies also can open up issues for societal debate and generate fresh moral engagements. This paper discusses two technological projects: schemes for pig farming in high-rise agro-production parks that came to be known as ‘pig towers’, and efforts to develop techniques for producing meat without animals by using stem cells, labelled ‘in vitro meat’. Even before fully entering our world as actually realized systems or commercially viable products, these technologies disclosed societal concerns over animal agriculture. These concerns were expressed through active public responses and were informed by formal methods of assessment, such as applied ethics and lifecycle analysis. By closely examining how features of these designs entered public debates and ethical thought, we trace the moral world-disclosing character of technological projects. We find that these proposals generate occasions for debate and gather new societal actors to form new coalitions or rifts. Both technologies gave rise to particular understandings of societal issues. As the central means through which problems were discussed changed, new types of arguments were considered relevant and ontological shifts could even be seen to occur with what was considered ‘real meat’ and the ‘true nature’ of animal farming. We argue that world disclosing involves a renewed sense of the character of political and moral agency, whereby the sensibilities that constitute a moral subject are redefined. Finally, we explore the inner tensions and ambiguities of this process of moral and political change by confronting the notions of ‘world disclosure’ developed by Dewey and Heidegger, thereby connecting to recent debates within both STS and political theory on how to understand political processes in a technological culture

Progressive field-state collapse and quantum non-demolition photon counting

The irreversible evolution of a microscopic system under measurement is a central feature of quantum theory. From an initial state generally exhibiting quantum uncertainty in the measured observable, the system is projected into a state in which this observable becomes precisely known. Its value is random, with a probability determined by the initial system's state. The evolution induced by measurement (known as 'state collapse') can be progressive, accumulating the effects of elementary state changes. Here we report the observation of such a step-by-step collapse by non-destructively measuring the photon number of a field stored in a cavity. Atoms behaving as microscopic clocks cross the cavity successively. By measuring the light-induced alterations of the clock rate, information is progressively extracted, until the initially uncertain photon number converges to an integer. The suppression of the photon number spread is demonstrated by correlations between repeated measurements. The procedure illustrates all the postulates of quantum measurement (state collapse, statistical results and repeatability) and should facilitate studies of non-classical fields trapped in cavities