PreprintCC BY 4.0arXiv
How Quantum Is Light? Concepts, Measures, and Applications of Optical Quantumness
Abstract
Quantum states are ultimately responsible for numerous counterintuitive phenomena that defy classical intuition. As the development of quantum technologies accelerates, our ability to harness these quantum resources becomes essential. This review addresses a fundamental question. How do we quantify the quantumness of a state, and which specific traits distinguish it from its classical counterparts? We examine quantumness through both theoretical and operational lenses, providing a clear framework for state characterization. Ultimately, we demonstrate that certifying quantumness is not just a theoretical exercise. It is a practical necessity for identifying, and realizing quantum advantage in real-world applications.
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BibTeX
@misc{bose2026quantum,
title = {{How Quantum Is Light? Concepts, Measures, and Applications of Optical Quantumness}},
author = {Soumyakanti Bose and Hyukjoon Kwon and Yong Siah Teo and Hyunseok Jeong and Luis L. Sánchez-Soto},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.25894},
eprint = {2610.25894},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.25894},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - How Quantum Is Light? Concepts, Measures, and Applications of Optical Quantumness
AU - Soumyakanti Bose
AU - Hyukjoon Kwon
AU - Yong Siah Teo
AU - Hyunseok Jeong
AU - Luis L. Sánchez-Soto
PY - 2026
DA - 2026/10/19
PB - arXiv
DO - 10.48550/arxiv.2610.25894
UR - https://arxiv.org/abs/2610.25894
AB - Quantum states are ultimately responsible for numerous counterintuitive phenomena that defy classical intuition. As the development of quantum technologies accelerates, our ability to harness these quantum resources becomes essential. This review addresses a fundamental question. How do we quantify the quantumness of a state, and which specific traits distinguish it from its classical counterparts? We examine quantumness through both theoretical and operational lenses, providing a clear framework for state characterization. Ultimately, we demonstrate that certifying quantumness is not just a theoretical exercise. It is a practical necessity for identifying, and realizing quantum advantage in real-world applications.
ER -