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PreprintCC BY 4.0arXiv

Measuring correlations using local and nonlocal quenches

  • Alexey G. Mikhaylenko
  • Andrew G. Semenov
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Abstract

We present a theoretical proposal for measuring correlation functions in a quantum field system based on the use of quantum quenches. Using the examples of massive and massless scalar field theories, we show that a short-term perturbation of the system leads to a dependence of the further evolution of the average field on the initial state's correlation functions. Considering two types of perturbations, namely local and nonlocal quenches, we show which correlation functions can be measured in each of these cases. The proposed procedure can be applied to study non-Gaussian correlations.

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Cite

BibTeXRIS
BibTeX
@misc{mikhaylenko2026measuring,
  title = {{Measuring correlations using local and nonlocal quenches}},
  author = {Alexey G. Mikhaylenko and Andrew G. Semenov},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.24873},
  eprint = {2609.24873},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.24873},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Measuring correlations using local and nonlocal quenches
AU  - Alexey G. Mikhaylenko
AU  - Andrew G. Semenov
PY  - 2026
DA  - 2026/09/21
PB  - arXiv
DO  - 10.48550/arxiv.2609.24873
UR  - https://arxiv.org/abs/2609.24873
AB  - We present a theoretical proposal for measuring correlation functions in a quantum field system based on the use of quantum quenches. Using the examples of massive and massless scalar field theories, we show that a short-term perturbation of the system leads to a dependence of the further evolution of the average field on the initial state's correlation functions. Considering two types of perturbations, namely local and nonlocal quenches, we show which correlation functions can be measured in each of these cases. The proposed procedure can be applied to study non-Gaussian correlations.
ER  -