2012/04/12 by Lars S. Madsen, Adriano Berni, Mikael Lassen +1 · 65 citations
Computer Science · Physics and Astronomy · #Gaussian #Open quantum system #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum discord #Quantum mechanics #Statistical physics #quant-ph
paper · pdf · doi:10.1103/physrevlett.109.030402
published in Physical Review Letters 109(3), 030402 (American Physical Society) · 5 pages, 5 figures
arxiv created 2012/04/12 · openalex publication_date 2012/07/17 · arxiv updated 2012/08/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Gaussian quantum discord is a measure of quantum correlations in gaussian systems. Using gaussian discord, we quantify the quantum correlations of a bipartite entangled state and a separable two-mode mixture of coherent states. We experimentally analyze the effect of noise addition and dissipation on gaussian discord and show that the former noise degrades the discord, while the latter noise for some states leads to an increase of the discord. In particular, we experimentally demonstrate the near death of discord by noisy evolution and its revival through dissipation.