2011/05/31 by Francesco Ciccarello, Vittorio Giovannetti · 4 citations
Computer Science · Mathematics · Physics and Astronomy · #Action (physics) #Amplitude damping channel #Bloch sphere #Computer science #Markov process #Mathematics #Measure (data warehouse) #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum channel #Quantum discord #Quantum entanglement #Quantum information #Quantum mechanics #Qubit #Separable state #Statistical physics #quant-ph
paper · pdf · doi:10.1103/physreva.85.010102
published as Phys. Rev. A 85, 010102(R) (2012) · 5 pages, 4 figures
openalex publication_date 2012/01/30 · arxiv created 2012/02/09 · arxiv updated 2012/02/10 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We show that two qubits, initially in a fully classical state, can develop significant quantum correlations as measured by the quantum discord (QD) under the action of a local memoryless noise (specifically we consider the case of a Markovian amplitude-damping channel). This is analytically proven after deriving in a compact form the QD for the class of separable states involved in such a process. We provide a picture in the Bloch sphere that unambiguously highlights the physical mechanism behind the effect regardless of the specific measure of quantum correlations adopted.