Posmon spectrosopy of quantum state on a circle

TL;DR

This paper analyzes the distribution of the posmom operator for quantum states on a circle, revealing symmetry properties and eigenfunctions, with potential experimental implications.

Contribution

It introduces the posmometry for eigenstates on a circle, highlighting its symmetry properties and complete eigenfunction set, extending previous theoretical work.

Findings

Posmom has two parity symmetries under mirror operations.

Eigenfunctions are four-valued, defined in each circle quadrant.

Results are potentially experimentally testable.

Abstract

Developing the analysis of the distribution of the particle's position-momentum dot product, the so-called \textit{posmom} $\mathbf{x}% \cdot \mathbf{p}$\textbf{,} to quantum states on a circular circle on two-dimensional Cartesian coordinates, we give its posmometry (introduced recently by Y. A. Bernard and P. M. W. Gill, Posmom: The Unobserved Observable, J. Phys. Chem. Lett. 1\textbf{(}2010\textbf{)}1254) for eigenstates of the free motion on the circle, i.e., $z$-axis component of the angular momentum. The posmom has two parity symmetries, specifically, invariant under two operations $m_{x}$ and $m_{y}$ representing mirror symmetry about $x$ and $y$ axis respectively. The complete eigenfunction set of the posmom is then four-valued and consists of four basic parts each of them is defined within a distinct quadrant of the circle. The results are not only potentially experimentally testable, but also reflect a fact that the embedding of the circle $S^{1}$ in two-dimensional flat space $R^{2}$ is physically reasonable.