Numerical study of Wigner negativity in one-dimensional steady-state resonance fluorescence
Journal article, 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.

Author

Ingrid Strandberg

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Yong Lu

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology

Isaac Fernando Quijandria Diaz

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Göran Johansson

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

Physical Review A - Atomic, Molecular, and Optical Physics

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

Vol. 100 6 063808

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Subject Categories

Atom and Molecular Physics and Optics

Other Physics Topics

DOI

10.1103/PhysRevA.100.063808

More information

Latest update

1/24/2020