Negative wigner function by decaying interaction from equilibrium

HIGHLIGHTS

• What: To reach quantum non-Gaussian coherence unconditionally from thermal equilibrium, the authors propose to exploit a sudden decay of a part of interactions in combination with synthetic qubitoscillator interactions. As the global system evolves according to Eq , the authors focus on the properties of the reduced LHO state, namely on its quantum coherence in local energy eigensbasis and non-Gaussianity represented by negative values of the corresponding Wigner function , at certain optimal time of evolution denoted as t* in this work, with the corresponding state denoted as ρ̂*. The aim of this interaction is to autonomously prepare . . .
  

   

  

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