Negative spontaneous emission by a moving two-level atom

Abstract

In this paper we investigate how the dynamics of a two-level atom is affected by its interaction with the quantized near field of a plasmonic slab in relative motion. We demonstrate that for small separation distances and a relative velocity greater than a certain threshold, this interaction can lead to a population inversion, such that the probability of the excited state exceeds the probability of the ground state, corresponding to a negative spontaneous emission rate. It is shown that the developed theory is intimately related to a classical problem. The problem of quantum friction is analyzed and the differences with respect to the corresponding classical effect are highlighted.

29 pages, 3 figures

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• Topological Angular Momentum and Radiative Heat Transport in Closed Orbits
• Spontaneous lateral atomic recoil force close to a photonic topological material
• Revisiting the Abraham-Minkowski Dilemma
• Topological classification of Chern-type insulators with the photonic Green function
• Optical torque on a two-level system near a strongly nonreciprocal medium
• Lateral Optical Forces on Linearly-Polarized Emitters near a Reciprocal Substrate
• Stable-to-unstable transition in quantum friction
• Spontaneous emission of a moving atom in the presence of magnetodielectric material: A relativistic approach
• Spontaneous Rotational Symmetry Breaking in a Kramers Two-Level System