Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2014-11-01

Journal: INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS

Included Journals: SCIE

Volume: 53

Issue: 11

Page Number: 4057-4064

ISSN: 0020-7748

Key Words: Quantum nondemolition measurement; Atomic ensembles; Entanglement evolution; Squeezing states

Abstract: Quantum nondemolition measurement scheme for entangled atomic ensembles was presented when they are restricted in two distant coupled cavities. Under certain conditions, we showed that the entanglement evolution of both the atomic ensembles and cavity fields are of the same periods, which provides us with potential nondemolition measurement of entangled atomic ensembles by experimentally detecting cavity fields. Including the dissipation of the cavity fields, the same steps of evolution still hold. Furthermore, it is shown that we can have the two-mode squeezing steady-states of both the cavity fields and the atomic ensembles, which really provides us with the quantum nondemolition measurement of the entangled atomic state.