Work

Non-Markovian dynamics of quantum discord

Year: 2010

Type: article

Abstract: We evaluate the quantum discord dynamics of two qubits in independent and common non-Markovian environments. We compare the dynamics of entanglement with that of quantum discord. For independent reservoirs the quantum discord vanishes only at discrete instants whereas the entanglement can disappear during a finite time interval. For a common reservoir, quantum discord and entanglement can behave very differently with sudden birth of the former but not of the latter. Furthermore, in this case the quantum discord dynamics presents sudden changes in the derivative of its time evolution which is evidenced by the presence of kinks in its behavior at discrete instants of time.

Source: Physical Review A

DOI: 10.1103/physreva.81.052107

Authors: F. F. Fanchini, T. Werlang, C. A. Brasil, L. G. E. Arruda, A. O. Caldeira

Institutions: Universidade Estadual de Campinas (UNICAMP), Universidade Federal de São Carlos, Universidade de São Paulo, Instituto de Física de São Carlos

Language: English

Topic: Quantum Information and Cryptography

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Fundação de Amparo à Pesquisa do Estado de São Paulo, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Instituto Nacional de Ciência e Tecnologia de Informação Quântica

OpenAlex ID: W2004143918

FWCI: 34.29

Cites: 41

Cited by: 464

Related to: 10