Steady-State Generation of Wigner-Negative States in One-Dimensional Resonance Fluorescence
Fernando Quijandría, Ingrid Strandberg, Göran Johansson · Physical Review Letters · 2018
In this work we demonstrate numerically that the nonlinearity provided by a continuously driven two-level system allows for the generation of Wigner-negative states of the electromagnetic field confined in one spatial dimension. Wigner-negative states, also known as Wigner nonclassical states, are desirable for quantum information protocols beyond the scope of classical computers. Focusing on the steady-state emission from the two-level system, we find the largest negativity at the drive strength where the coherent reflection vanishes.