2011/06/01 by Jianwei Xu, Qihui Chen, Xu, Jianwei +1
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Spectroscopy and Quantum Chemical Studies #Quantum Mechanics and Applications
paper · pdf · doi:10.48550/arxiv.1106.0125
We investigate the dynamics of entanglement and quantum discord of two qubits in liquid state homonuclear NMR. Applying a phenomenological description for NMR under relaxation process, and taking a group of typical parameters of NMR, we show that when a zero initial state |00> experiences a relaxation process, its entanglement disappears completely after a sequence of so-called sudden deaths and revivals, while the quantum discord retains remarkable values after a sequence of oscillations. That is to say, the quantum discord is more robust than entanglement.