Entanglement generation in a system of two atomic quantum dots coupled to a pool of interacting bosons

Abstract

We discuss entanglement generation in a closed system of one or two atomic quantum dots (qubits) coupled via Raman transitions to a pool of cold interacting bosons. The system exhibits rich entanglement dynamics, which we analyze in detail in an exact quantum mechanical treatment of the problem. The bipartite setup of only one atomic quantum dot coupled to a pool of bosons turns out to be equivalent to two qubits which easily get entangled being initially in a product state. We show that both the number of bosons in the pool and the boson-boson interaction crucially affect the entanglement characteristics of the system. The tripartite system of two atomic quantum dots and a pool of bosons reduces to a qubit-qutrit-qubit realization. We consider entanglement possibilities of the pure system as well as of reduced ones by tracing out one of the constituents, and show how the entanglement can be controlled by varying system parameters. We demonstrate that the qutrit, as expected, plays a leading role in entangling of the two qubits and the maximum entanglement depends in a nontrivial way on the pool characteristics.

16 pages, 6 figures

References in corpus (5)

• Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
• A trapped single ion inside a Bose-Einstein condensate
• Non-Perturbative Entangling Gates between Distant Qubits using Uniform Cold Atom Chains
• Estimating entanglement monotones with a generalization of the Wootters formula
• Graph state generation with noisy mirror-inverting spin chains

Cited by in corpus (4)

• Impurities as a quantum thermometer for a Bose-Einstein condensate
• Robust fermionic-mode entanglement of a nanoelectronic system in non-Markovian environments
• Coupled modes locally interacting with qubits: critical assessment of the rotating wave approximation
• Manipulating the Mott lobes: optical lattice bosons coupled to an array of atomic quantum dots