What is it about?
Anyone interested in extending the results of Quantum Information Theory (QIT) to the context of Relativity must have heard of the fundamental perplexities posed by the seminal work of Peres, Scudo, and Terno in 2002. This perplexity is clarified and resolved in this paper by analyzing the mathematical anatomy of the spin reduced density matrix. This is done by exploiting the vector bundle language to describe the single-particle state space of massive spin-1/2 particle.
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Why is it important?
Any true physical theory must make sense in the context of Relativity. However, to the best of the author's knowledge, QIT has never been successfully incorporated into the relativistic context. This is because the fundamental perplexities of Relativistic Quantum Information theory (RQI) posed by the early pioneering works of the field have not seen a definitive clarification, until the publication of this paper. This paper gives a clear mathematical resolution of this problem.
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This page is a summary of: Relativistic massive particle with spin-1/2: A vector bundle point of view, Journal of Mathematical Physics, January 2022, American Institute of Physics,
DOI: 10.1063/5.0064409.
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