Excitability in quantum field theory
Fuente:
arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866908985840369664 |
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| author | Caminiti, Jacqueline Capeccia, Federico Sorce, Jonathan |
| author_facet | Caminiti, Jacqueline Capeccia, Federico Sorce, Jonathan |
| contents | In quantum field theory, it is not always possible to excite one state out of another using only local operators. This paper establishes abstract algebraic criteria for (local) excitability in general quantum theories, and computes these criteria explicitly for zero-mean Gaussian states in (generalized) free field theories. We find that in this context, due to the special nature of Gaussian states, one-way excitability always implies two-way excitability, and our results generalize the "quasiequivalence theorems" of Powers, Stormer, van Daele, Araki, and Yamagami. A key role in our proof is played by the information-theoretic tool of canonical purification. In appendices, we provide a pedagogical introduction to the algebraic formulation of (generalized) free field theory. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_19861 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Excitability in quantum field theory Caminiti, Jacqueline Capeccia, Federico Sorce, Jonathan High Energy Physics - Theory General Relativity and Quantum Cosmology Mathematical Physics Operator Algebras In quantum field theory, it is not always possible to excite one state out of another using only local operators. This paper establishes abstract algebraic criteria for (local) excitability in general quantum theories, and computes these criteria explicitly for zero-mean Gaussian states in (generalized) free field theories. We find that in this context, due to the special nature of Gaussian states, one-way excitability always implies two-way excitability, and our results generalize the "quasiequivalence theorems" of Powers, Stormer, van Daele, Araki, and Yamagami. A key role in our proof is played by the information-theoretic tool of canonical purification. In appendices, we provide a pedagogical introduction to the algebraic formulation of (generalized) free field theory. |
| title | Excitability in quantum field theory |
| topic | High Energy Physics - Theory General Relativity and Quantum Cosmology Mathematical Physics Operator Algebras |
| url | https://arxiv.org/abs/2604.19861 |