2011/08/31 by Francesco Ciccarello, Vittorio Giovannetti · 39 citations
Computer Science · Mathematics · Physics and Astronomy · #Amplitude damping channel #Bipartite graph #Classical capacity #Discrete mathematics #Dissipative system #Mathematical analysis #Mathematics #Monotonic function #Open quantum system #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum capacity #Quantum channel #Quantum discord #Quantum information #Quantum mechanics #Quantum operation #Qubit #Statistical physics #Unitary state #quant-ph
paper · pdf · doi:10.1103/physreva.85.022108
published in Physical Review A 85(2) (American Physical Society) · 6 pages, 4 figures
openalex publication_date 2012/02/07 · arxiv created 2012/02/09 · arxiv updated 2012/02/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
It was recently discovered that the quantum correlations of a pair of disentangled qubits, as measured by the quantum discord, can increase solely because of their interaction with a local dissipative bath. Here, we show that a similar phenomenon can occur in continuous-variable bipartite systems. With this aim, we consider a class of two-mode squeezed thermal states and study the behavior of Gaussian quantum discord under various local Markovian nonunitary channels. While these in general cause a monotonic drop of quantum correlations, an initial rise can take place with a thermal-noise channel.