Quantum coherence of Gaussian states

2016/09/04 by Buono, Daniela, Nocerino, Gaetano, Petrillo, Giuseppe +3
#FOS: Physical sciences #Mathematical Physics (math-ph) #Other Condensed Matter (cond-mat.other) #Quantum Physics (quant-ph)

paper · doi:10.48550/arxiv.1609.00913

Abstract

We introduce a geometric quantification of quantum coherence in single-mode Gaussian states and we investigate the behavior of distance measures as functions of different physical parameters. In the case of squeezed thermal states, we observe that re-quantization yields an effect of noise-enhanced quantum coherence for increasing thermal photon number.

Related

• Coherence of quantum Gaussian channels
• Modes mismatch induced variation of quantum coherence for two-mode localized Gaussian states in accelerated frame
• Boosting State Discrimination in Quantum Brownian Motion Channel via Memory-Induced Coherence Preservation
• Exact temporal second-order coherence function for displaced-squeezed thermal states
• Quantifying decoherence in continuous variable systems