TL;DR
This paper reviews the development and significance of entangled coherent states in quantum physics, highlighting their theoretical importance and experimental realizations despite their fragility.
Contribution
It provides a comprehensive overview of entangled coherent states from 1967 to present, emphasizing their roles in quantum information and optics.
Findings
Entangled coherent states are crucial for quantum superselection principles.
They have been realized experimentally in quantum optics.
Their inherent fragility poses challenges for practical applications.
Abstract
We review entangled coherent state research since its first implicit use in 1967 to the present. Entangled coherent states are important to quantum superselection principles, quantum information processing, quantum optics, and mathematical physics. Despite their inherent fragility they have produced in a conditional propagating-wave quantum optics realization. Fundamentally the states are intriguing because they are entanglements of the coherent states, which are in a sense the most classical of all states of a dynamical system.
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