Universality of sudden death of entanglement

We present a constructive argument to demonstrate the universality of the sudden death of entanglement in the case of two non-interacting qubits, each of which generically coupled to independent Markovian environments at zero temperature. Conditions for the occurrence of the abrupt disappearance of entanglement are determined and, most importantly, rigourously shown to be almost always satisfied: Dynamical models for which the sudden death of entanglement does not occur are seen to form a highly idealized zero-measure subset within the set of all possible quantum dynamics.

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

FAPESP Fundacao de Amparo a Pesquisa do Estado de Sao Paulo, Brazil[05/04105-5]

Brazilian National Institute of Science and Technology for Quantum Information (INCT-IQ)

Brazilian National Institute of Science and Technology for Quantum Information (INCT-IQ)

Millennium Institute for Quantum Information - Conselho Nacional de Desenvolvimento Cientfico e Tecnolgico (CNPq), Brazil

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

CNPq