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Fundamental indeterminacy of spacetime

Project description

Clarifying the concept of spacetime emergence

Current physics theories are characterised by their incompatibility and the absence of a fundamental theory of nature that provides a quantum description of space and time. Emergent spacetime theories (ESTs) have been proposed as solutions in the quest for quantum gravity, yet they encounter philosophical challenges stemming from a perceived gap between their mathematical framework and their postulated physical significance. With the support of the Marie Skłodowska-Curie Actions (MSCA) programme, the FIndS project aims to address the conceptual issues surrounding ESTs, contributing to advancements in philosophy, particularly in areas related to spacetime, emergence, and indeterminacy, as well as in quantum physics. The project also advocates for a realist interpretative approach to defend scientific realism, even amidst theory change and proliferation.

Objective

It has been a long-lasting major mystery in modern physics that our current best theories, namely general relativity for spacetime and quantum mechanics (QM) for matter, are incompatible with each other, revealing deep conceptual flaws in the way we understand the physical world. We currently lack a truly fundamental theory of nature that provides a quantum description of space and time (i.e. a theory of quantum gravity (QG)). Yet, an important obstacle currently stands in the way of the current development of QG. Indeed, influential research programmes attempting to find a theory of QG yield theories in which spacetime is emergent, rather than fundamental. Such approaches, called emergent spacetime theories (ESTs), raise critical philosophical challenges for the very possibility of considering these theories as describing the fundamental physical world, beyond their mere mathematical content. There exists a gap between the mathematical nature of the theories and their postulated meaning. Such a gap is highly detrimental to the development of fundamental physics. The project FIndS intends to fill that gap by providing a clear, intelligible interpretation of what it means for spacetime to be emergent in ESTs.

The projects outputs are expected to contribute to the following scientific impacts. First, the research will provide a unified solution to the current conceptual obstacles of ESTs. In the long term, this can foster new knowledge in philosophy (of spacetime, emergence and indeterminacy), and quantum physics, thereby contributing to the objectives of the European Quantum Flagship initiative. Second, the research will promote a specific realist interpretative recipe that can, during and shortly after the project, be used as a defence of scientific realism in the face of theory change and proliferation.

The researcher has a background in physics and quantum metaphysics (esp. of spacetime). FIndS is the ideal project to complete her expertise in that field.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

(opens in new window) HORIZON-MSCA-2022-PF-01

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Coordinator

LUDWIG-MAXIMILIANS-UNIVERSITAET MUENCHEN
Net EU contribution
€ 173 847,36
Address
GESCHWISTER SCHOLL PLATZ 1
80539 Planegg
Germany
Region
Bayern Oberbayern München, Kreisfreie Stadt
Activity type
Higher or Secondary Education Establishments
Links
Total cost
No data