Bound entanglement in the Jaynes-Cummings model

Nicolás Quesada, Anna Sanpera

Research output: Contribution to journalArticleResearchpeer-review

7 Citations (Scopus)


We study in detail entanglement properties of the Jaynes-Cummings model assuming a two-level atom (qubit) interacting with the first N levels of an electromagnetic field mode (qudit) in a cavity. In the Jaynes-Cummings model, the number operator is the conserved quantity that allows for the exact diagonalization of the Hamiltonian and thus we study states that commute with this conserved quantity and whose structure is preserved under the Jaynes-Cummings dynamics. Contrary to the common belief, we show that there are bound entangled states that satisfy the symmetries imposed by the conservation of the number of excitations when N > 3. Furthermore we show that the Jaynes-Cummings interaction can be used to generate bound entanglement between the atom and the mode. © 2013 IOP Publishing Ltd.Printed in the UK & the USA.
Original languageEnglish
Article number224002
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Publication statusPublished - 28 Nov 2013


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