PT Symmetry via Electromagnetically Induced Transparency
Quantum Physics
2015-06-16 v3
Abstract
We propose a scheme to realize parity-time (PT) symmetry via electromagnetically induced transparency (EIT). The system we consider is an ensemble of cold four-level atoms with an EIT core. We show that the cross-phase modulation contributed by an assisted field, the optical lattice potential provided by a far-detuned laser field, and the optical gain resulted from an incoherent pumping can be used to construct a PT-symmetric complex optical potential for probe field propagation in a controllable way. Comparing with previous study, the present scheme uses only a single atomic species and hence is easy for the physical realization of PT-symmetric Hamiltonian via atomic coherence.
Cite
@article{arxiv.1307.2695,
title = {PT Symmetry via Electromagnetically Induced Transparency},
author = {Huijun Li and Jianpeng Dou and Guoxiang Huang},
journal= {arXiv preprint arXiv:1307.2695},
year = {2015}
}