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arXiv:1707.06442 · Quantum science and technology

Frozen and Invariant Quantum Discord Under Local Dephasing Noise

Göktuğ Karpat, Carole Addis, Sabrina Maniscalco

Published Jan 1, 2017• 1 citation
arXivHTMLPDF
DOI
10.1007/978-3-319-53412-1_16

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Preserving quantum coherence is fundamental challenge in the field of quantum computation. Here, I investigate the frozen discord phenomenon and non-Markovianity for qubits experiencing local dephasing in a classical environment. The quantum discord of a certain initial bipartite state, independently interacting with stochastic Gaussian fields, can be frozen for a finite time. The preservation of discord is shown to be intimately related to the backflow of information from the environment. The relevant result for quantum dephasing environment is compared.