What are they talking about?it is well known, that classical limit of a quantum system on a sphere (quantum top) corresponds to infinite value of a spin but not to zero value of [itex]\hbar[/itex]
A quantum top is a theoretical model used in quantum mechanics to study the behavior of a spinning top. It is a simplified version of a more complex system, such as a molecule, which allows for easier analysis and understanding of quantum phenomena.
A classical top is described by classical mechanics, which is based on Newton's laws of motion. In contrast, a quantum top is described by quantum mechanics, which takes into account the principles of quantum physics, such as wave-particle duality and uncertainty. This leads to different behaviors and properties of the top, such as quantized energy levels and superposition states.
Studying quantum tops allows us to gain a deeper understanding of the fundamental principles of quantum mechanics. It also has practical applications in fields such as materials science, where the behavior of molecules can be better understood by studying simplified models like the quantum top.
Chaichian & Demichev are two physicists who published the book "Introduction to Quantum Mechanics" in 1986, which included a chapter on quantum tops. Their contribution was to introduce the concept of the quantum top and use it as a tool to teach and explore the concepts of quantum mechanics.
Quantum tops are theoretical models and cannot be observed directly in real life. However, their behavior and properties can be observed and studied in real-life systems, such as molecules, atoms, and subatomic particles, which exhibit similar quantum phenomena as a quantum top.