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Frontiers in Optics

Enhancement of Entanglement in Coupled Quantum Dots via interaction with Squeezed Light

William D. Rawlinson, Arnab Mitra, Reeta Vyas

Published Jan 1, 2011• 0 citations
Publisher

Abstract

Evolution of entanglement of formation is studied when coupled quantum dots in a zero entangled state are placed in a high-Q cavity and are interacting with field initially in a squeezed-coherent state.
DOI
10.1364/fio.2011.jtua39

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•Jan 1, 2002•1 citation
The generation of entanglement between two identical, interacting quantum dots---initially in ground states---by a coherent field and the subsequent time evolution of the entanglement are studied by calculating the concurrence between the two dots. The results predict that while it is possible to generate entanglement (or entanglement of formation, as defined for a mixed state) between the two dots, at no time do the dots become fully entangled to each other or is a maximally entangled Bell state ever achieved. We also observe that the degree of entanglement increases with an increase in the photon number inside the cavity and a decrease in the dot-photon coupling. The behavior of the two-dot system, initially prepared in an entangled state and interacting with thermal light, is also studied.