Probing Noncommutativities of Phase Space by Using Persistent Charged Current and Its Asymmetry

Abstract

We study the physical properties of the persistent charged current in a metal ring on a noncommutative phase space, and temperature dependence of the noncommutative corrections are also analyzed. We find that the coordinate noncommutativity only affects the total magnitude of the current, and it is difficult to observe it. In contrast, the momentum noncommutativity can violate symmetry property of the current, and this violation of symmetry holds at a finite temperature. Based on this violation effect, we introduce an asymmetry observable to measure the momentum noncommutativity.

Comments: 15 pages, 3 figures. v2: typos and a sign in Eq.(5) are corrected, a figure is revised correspondingly; v3: texts are improved, and references are added