arXiv subjects

Jennifer Carter

Publications and source records attributed to Jennifer Carter.

3 recordsLinked to original sources

arXiv2025

UK White Paper on Magnetic Reconnection

Magnetic reconnection powers explosive releases of magnetic energy, heating and particle acceleration throughout the plasma universe. Knowledge of this universal process is vital to understanding the Heliosphere, as it plays a key role in solar flares, coronal mass ejections, coronal heating, solar wind acceleration, geomagnetic storms, and interactions between the solar wind and planetary magnetospheres. As such, reconnection underpins multiple science objectives of multiple future space missions. The UK plays a leading role in this international field, through a combination of in situ measurements from Earth's magnetosphere and the solar wind, observations of the solar corona and chromosphere, and world-class numerical simulations and theory. This white paper identifies: Nine priority science objectives for reconnection research in the next decade; Recommendations to guide investment in theory, simulations and infrastructure; Mission priorities and required measurements to ensure the UK maintains and improves its world-class credentials in reconnection science.

astro-ph.IM↗

arXiv2025

Intersubjective Agreement about Measurement Outcomes Is Unnecessary in QBism

The thought experiment called ``Wigner's Friend" has experienced a renewal of interest for interrogating the meaning of intersubjectivity and objectivity in quantum mechanics. These new inquiries extend to investigations at the intersection of phenomenology and QBism. Philosopher of physics Steven French argues that QBism does not give assurances that Wigner and friend must agree on the same quantum state or measurement outcomes. In this article, we draw on Wigner's Friend to argue that an external guarantee for agreement on either quantum states or measurement outcomes is unnecessary. We defend the view that the quantum formalism is already inherently intersubjective in the way required to sustain objectivity. Here we explore the QBist notion of reciprocity, which treats Wigner and friend as physical systems taking mutual actions on each other. The QBist notion of reciprocity leads to a sharper characterization of what it means to objectify quantum systems with the formalism. Drawing on phenomenological resources, we argue that state assignments for quantum systems, including those for Wigner and friend, are a form of objectification. To assign a quantum state is to objectify a phenomenon as a quantum system, to treat something as the sort of object to which the formalism applies. Our argument accounts for why the quantum formalism does not radically change in application for different systems because the systems themselves exceed their formalization.

quant-ph↗

arXiv2021

Supervised laser-speckle image sampling of skin tissue to detect very early stage of diabetes by its effects on skin subcellular properties

This paper investigates the effectiveness of an expert system based on K-nearest neighbors algorithm for laser speckle image sampling applied to the early detection of diabetes. With the latest developments in artificial intelligent guided laser speckle imaging technologies, it may be possible to optimise laser parameters, such as wavelength, energy level and image texture measures in association with a suitable AI technique to interact effectively with the subcellular properties of a skin tissue to detect early signs of diabetes. The new approach is potentially more effective than the classical skin glucose level observation because of its optimised combination of laser physics and AI techniques, and additionally, it allows non-expert individuals to perform more frequent skin tissue tests for an early detection of diabetes.

eess.IV↗