2006/11/09 by Mark E. Perel'man, M.E. Perel'man
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Electromagnetic field #Field (mathematics) #Light cone #Lorentz transformation #Physics #Propagator #Quantum #Quantum Electrodynamics and Casimir Effect #Quantum Mechanics and Applications #Quantum electrodynamics #Quantum field theory #Quantum mechanics #Quantum nonlocality #Scalar (mathematics) #Superluminal motion #quant-ph
paper · pdf · doi:10.1002/andp.200610240
21 pages
arxiv created 2006/11/09 · openalex publication_date 2007/03/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The local field contribution to some three- and four-level coherent atomic vapors is considered, and a significant modification to optical properties due to dipole-dipole interaction between neighboring atoms is discussed. It is found that the local field effect can reduce loss of a four-level N-type vapor medium at the resonant frequency in both the steady and transient cases. In order to achieve a left-handed medium with a negative refractive index, a scenario to realize simultaneously negative permittivity and permeability inside a mixed coherent atomic vapor by using quantum coherence effect is suggested. One of the remarkable features of the present scheme is such that it can lead to a controllable manipulation of negative refractive index of an atomic vapor by using external coupling and signal fields. This may be a new scheme to fabricate the negatively refracting materials based on quantum optical approach.