9,625 research outputs found

    Fictorians: historians who \u27lie\u27 about the past, and like it

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    Debates about history and fiction tend to pitch novelist against historian in a battle over who owns or best represents the past. This article posits that things are not quite so dichotomous: novelists write non-fiction histories, and historians even sometimes write novels. In fact, these latter seem, anecdotally, to be increasing in number in recent decades. The author approached some of these historians to find out why they have turned to writing fictionalised versions of the past to complement, or sometimes replace, their non-fiction publications. For the sake of clarity, in the article I have playfully dubbed the historians who write historical fiction as ‘fictorians’. The article considers their responses within wider discussions about history and fiction, and reflects briefly upon the meaning of this ‘fictional turn’ for the future of the history discipline

    Gravitomagnetic Fields in Rotating Superconductors to Solve Tate's Cooper Pair Mass Anomaly

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    Superconductors have often been used to claim gravitational anomalies in the context of breakthrough propulsion. The experiments could not be reproduced by others up to now, and the theories were either shown to be wrong or are often based on difficult to prove assumptions. We will show that superconductors indeed could be used to produce non-classical gravitational fields, based on the established disagreement between theoretical prediction and measured Cooper-pair mass in Niobium. Tate et al failed to measure the Cooper-pair mass in Niobium as predicted by quantum theory. This has been discussed in the literature without any apparent solution. Based on the work from DeWitt to include gravitomagnetism in the canonical momentum of Cooper-pairs, the authors published a number of papers discussing a possibly involved gravitomagnetic field in rotating superconductors to solve Tate's measured anomaly. Although one possibility to match Tate's measurement, a number of reasons were developed by the authors over the last years to show that the gravitomagnetic field in a rotating quantum material must be different from its classical value and that Tate's result is actually the first experimental sign for it. This paper reviews the latest theoretical approaches to solve the Tate Cooper-pair anomaly based on gravitomagnetic fields in rotating superconductors

    Generation of Closed Timelike Curves with Rotating Superconductors

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    The spacetime metric around a rotating SuperConductive Ring (SCR) is deduced from the gravitomagnetic London moment in rotating superconductors. It is shown that theoretically it is possible to generate Closed Timelike Curves (CTC) with rotating SCRs. The possibility to use these CTC's to travel in time as initially idealized by G\"{o}del is investigated. It is shown however, that from a technology and experimental point of view these ideas are impossible to implement in the present context.Comment: 9 pages. Submitted to Classical and Quantum Gravit
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