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Applying Quantum Tomography to Hadronic Interactions
by J. C. Martens, J. P. Ralston, D. Tapia Takaki
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Submission summary
| Authors (as registered SciPost users): | John Ralston |
| Submission information | |
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| Preprint Link: | scipost_202107_00095v1 (pdf) |
| Date submitted: | 2021-07-30 21:16 |
| Submitted by: | Ralston, John |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 28th Annual Workshop on Deep-Inelastic Scattering (DIS) and Related Subjects (DIS2021) |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approaches: | Experimental, Phenomenological |
Abstract
A proper description of inclusive reactions is expressed with density matrices. Quantum tomography reconstructs density matrices from experimental observables. We review recent work that applies quantum tomography to practical experimental data analysis. Almost all field-theoretic formalism and modeling used in a traditional approach is circumvented with great efficiency. Tomographically-determined density matrices can express information about quantum systems which cannot in principle be expressed with distributions defined by classical probability. Topics such as entanglement and von Neumann entropy can be accessed using the same natural language where they are defined. A deep relation exists between {\it separability}, as defined in quantum information science, and {\it factorization}, as defined in high energy physics. Factorization acquires a non-perturbative definition when expressed in terms of a conditional form of separability. An example illustrates how to go from data for momentum 4-vectors to a density matrix while bypassing almost all the formalism of the Standard Model.
Current status:
Reports on this Submission
Report #1 by Anonymous (Referee 1) on 2022-2-17 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_202107_00095v1, delivered 2022-02-17, doi: 10.21468/SciPost.Report.4450
Report
The manuscript presents the quantum tomography method which is used to reconstruct density matrices from the experimental data. A density matrix tomographically reconstructed from experimental data can determine the entanglement entropy of the production process and all other quantum mechanical observables that are desired. They also presented a study that introduces quantum tomography to collider physics with the illustration of the angular distribution of lepton pairs. The proceeding is well-written and is certainly worth publishing.
There are two minor corrections;
$\bullet$ on page 4; "Hadronic Reactions" section, in the $3^{rd}$ paragraph: In is conventionally described $\rightarrow$ It is conventionally described
$\bullet$ on page 6; in the $1^{st}$ paragraph: quarks and gluons [?] led to $\rightarrow$ missing reference