Numerical study of Wigner negativity in one-dimensional steady-state resonance fluorescence
Artikel i vetenskaplig tidskrift, 2019

In a numerical study, we investigate the steady-state generation of nonclassical states of light from a coherently driven two-level atom in a one-dimensional waveguide. Specifically, we look for states with a negative Wigner function, since such nonclassical states are a resource for quantum information processing applications, including quantum computing. We find that a waveguide terminated by a mirror at the position of the atom can provide Wigner-negative states, while an infinite waveguide yields strictly positive Wigner functions. Moreover, our paper reveals a connection between the purity of a quantum state and its Wigner negativity. We also analyze the effects of decoherence on the negativity of a state.


Ingrid Strandberg

Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik

Yong Lu

Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi

Isaac Fernando Quijandria Diaz

Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik

Göran Johansson

Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik

Physical Review A - Atomic, Molecular, and Optical Physics

1050-2947 (ISSN) 1094-1622 (eISSN)

Vol. 100 6 063808


Nanovetenskap och nanoteknik (SO 2010-2017, EI 2018-)


Atom- och molekylfysik och optik

Annan fysik



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