Abstract
Composing elementary physical systems is one of the most sober and important affairs in the foundations of science, art and every other meaningful endeavours of life. Of course quantum formalism provides us with a recipe for composing multipartite systems. But we would like to explore the ‘what if’ proposals (however wild those may sound) regarding composition of two elementary quantum systems. By the end of the talk I might be able to convince you (via thought experiments) that some of the proposals or ‘possibilities’ are indeed ‘unphysical’. I hope this process may help to ameliorate our affinity towards quantum mechanics.
Reference:
Composition of Multipartite Quantum Systems: Perspective from Timelike Paradigm; Naik et al. Phys. Rev. Lett. 128, 140401 (2021).
Timelike correlations and quantum tensor product structure; Sen et al. Phys. Rev. A 106, 062406 (2022).
Principle of Information Causality Rationalizes Quantum Composition; Patra et al. Phys. Rev. Lett. 130, 110202 (2023).
