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

Posazhennikova, Anna; Birmuske, Reinhard; Bruderer, Martin; Belzig, Wolfgang

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

Dateien

posazhennikova_224748.pdfGröße: 489.83 KBDownloads: 165

Datum

2012

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Preprint

Publikationsstatus

Published

Zusammenfassung

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.

Fachgebiet (DDC)

530 Physik

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ISO 690

POSAZHENNIKOVA, Anna, Reinhard BIRMUSKE, Martin BRUDERER, Wolfgang BELZIG, 2012. Entanglement generation in a system of two atomic quantum dots coupled to a pool of interacting bosons

BibTex

@unpublished{Posazhennikova2012Entan-22474,
  year={2012},
  title={Entanglement generation in a system of two atomic quantum dots coupled to a pool of interacting bosons},
  author={Posazhennikova, Anna and Birmuske, Reinhard and Bruderer, Martin and Belzig, Wolfgang}
}

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    <dcterms:abstract xml:lang="eng">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.</dcterms:abstract>
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