Delayed sudden birth of entanglement

Ficek, Zbigniew and Tanas, Ryszard (2008) Delayed sudden birth of entanglement. Physical Review A, 77 5: . doi:10.1103/PhysRevA.77.054301

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Author Ficek, Zbigniew
Tanas, Ryszard
Title Delayed sudden birth of entanglement
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
Publication date 2008-05-08
Sub-type Article (original research)
DOI 10.1103/PhysRevA.77.054301
Open Access Status File (Publisher version)
Volume 77
Issue 5
Total pages 4
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Abstract The concept of time delayed creation of entanglement by the dissipative process of spontaneous emission is investigated. A threshold effect for the creation of entanglement is found where the initially unentangled qubits can be entangled after a finite time despite the fact that the coherence between the qubits exists for all times. This delayed creation of entanglement, which we call sudden birth of entanglement, is opposite to the currently extensively discussed sudden death of entanglement and is characteristic for transient dynamics of one-photon entangled states of the system. We determine the threshold time for the creation of entanglement and find it is related to time at which the antisymmetric state remains the only excited state being populated. It is shown that the threshold time can be controlled by the distance between the qubits and the direction of initial excitation relative to the interatomic axis. This effect suggests an alternative for the study of entanglement and provides an interesting resource for creation on demand of entanglement between two qubits.
Keyword Quantum entanglement
Quantum optics
Spontaneous emission
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article #054301

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 174 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 178 times in Scopus Article | Citations
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Created: Fri, 20 Mar 2009, 20:22:05 EST by Jo Hughes on behalf of School of Mathematics & Physics