Control of multiatom entanglement in a cavity

Abstract

We propose a general formalism for analytical description of multiatomic ensembles interacting with a single mode quantized cavity field under the assumption that most atoms remain un-excited on average. By combining the obtained formalism with the nilpotent technique for the description of multipartite entanglement we are able to overview in a unified fashion different probabilistic control scenarios of entanglement among atoms or examine atomic ensembles. We then apply the proposed control schemes to the creation of multiatom states useful for quantum information.

11 pages, 1 figure. Finalized version

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• Decoherence-free preparation of Dicke states of trapped ions by collective stimulated Raman adiabatic passage
• Quantum fluctuations and correlations in open quantum Dicke models
• Creation of arbitrary Dicke and NOON states of trapped-ion qubits by global addressing with composite pulses
• Thermal Baths as Quantum Resources: More Friends than Foes?