Non-Hermitian Fermi-Dirac Distribution in Persistent Current Transport

Using Green’s function formalism, we introduce a non-Hermitian Fermi-Dirac distribution and derive an analytical expression for the persistent current that relies solely on the complex spectrum. For insights into why quantum many-body observables in equilibrium are continuous at exceptional points, please refer to my recent blog post.

The accompanying notebook has been featured in the Wolfram Community’s editorial columns: Staff Picks and Publication Materials.

Citation: P.-X. Shen, Z. Lu, J. L. Lado, and M. Trif, Physical Review Letters 133, 086301 (2024).