Tripartite quantum state mapping and discontinuous entanglement transfer in a cavity QED open system

Abstract

We describe the transfer of quantum information and entanglement from three flying (radiation) to three localized (atomic) qubits via cavity modes resonantly coupled to the atoms, in the presence of a common reservoir. Upon addressing the full dynamics of the resulting nine-qubit open system, we find that once the cavities are fed, fidelity and transferred entanglement are optimal, while their peak values exponentially decrease due to dissipative processes. The external radiation is then turned off and quantum correlations oscillate between atomic and cavity qubits. For a class of mixtures of W and GHZ input states we deal with a discontinuous exchange of entanglement among the subsystems, facing the still open problem of entanglement sudden death and birth in a multipartite system.

7 pages, 6 figures, 2 tables

References in corpus (16)

• Entanglement detection
• Finite-Time Disentanglement via Spontaneous Emission
• Sudden Death of Entanglement
• Distributed quantum computation via optical fibres
• Quantum State Engineering and Precision Metrology using State-Insensitive Light Traps
• Heralded Entanglement between Atomic Ensembles: Preparation, Decoherence, and Scaling
• Reversible state transfer between light and a single trapped atom
• Disentanglement and Decoherence by Open System Dynamics
• Experimental investigation of the dynamics of entanglement: Sudden death, complementarity, and continuous monitoring of the environment
• A classification of entanglement in three-qubit systems
• Vacuum-stimulated cooling of single atoms in three dimensions
• Deterministic loading of individual atoms to a high-finesse optical cavity
• Complete conditions for entanglement transfer
• Entanglement reciprocation between qubits and continuous variables
• Enhanced dynamical entanglement transfer with multiple qubits
• Tripartite entanglement transfer from flying modes to localized qubits

Cited by in corpus (2)

• Controlling tripartite entanglement among optical cavities by reservoir engineering
• Scattering model description of cascaded cavity configurations