We investigate the generation of entanglement of coherent excitonic states in coupled quantum dots placedin a cavity by meaning of the state preparation fidelity [Nature (London) 404 (2002) 256;Phys.Rev.A 65 (2002) 01...We investigate the generation of entanglement of coherent excitonic states in coupled quantum dots placedin a cavity by meaning of the state preparation fidelity [Nature (London) 404 (2002) 256;Phys.Rev.A 65 (2002) 012107;J.Uffink,Phys.Rev.Lett.88 (2002) 230406.] The effect of the number of exeitons and the coherent intensity |α| of thecavity field on the entanglement is also studied.展开更多
Quantum dots (QDs) have the potential to be used in the multiplexed bioanalysis for their unique property:multi-color QDs can be excited at the same single wavelength light. In this work,high quan-tum yield multi-colo...Quantum dots (QDs) have the potential to be used in the multiplexed bioanalysis for their unique property:multi-color QDs can be excited at the same single wavelength light. In this work,high quan-tum yield multi-color core/shell QDs were prepared. After being water-solubilized by amphiphilic polymer based on self-assembling,the QDs would be labeled by two different IgGs and used in the multiplexed biodetection. Fluorescence resonance energy transfer (FRET) should be avoided in the multiplexed biodetection. In this work,spectral analysis showed that no FRET appeared in water-soluble QDs modified by amphiphilic polymer. The immunofluorescence in vitro indicated that the QDs-IgGs bioconjugates had excellent species-specific detection ability with nearly non-specific binding. The setting of this model will help to support the application of multi-color QDs in the multiplexed bioanalysis communities.展开更多
基金National Natural Science Foundation of China under Grant Nos.10174024 and 10474025
文摘We investigate the generation of entanglement of coherent excitonic states in coupled quantum dots placedin a cavity by meaning of the state preparation fidelity [Nature (London) 404 (2002) 256;Phys.Rev.A 65 (2002) 012107;J.Uffink,Phys.Rev.Lett.88 (2002) 230406.] The effect of the number of exeitons and the coherent intensity |α| of thecavity field on the entanglement is also studied.
基金the National Science and Technology Program for Key Projects (Grant No.2004BA519A56-04)the 863 Program (Grant No.2007AA021808)
文摘Quantum dots (QDs) have the potential to be used in the multiplexed bioanalysis for their unique property:multi-color QDs can be excited at the same single wavelength light. In this work,high quan-tum yield multi-color core/shell QDs were prepared. After being water-solubilized by amphiphilic polymer based on self-assembling,the QDs would be labeled by two different IgGs and used in the multiplexed biodetection. Fluorescence resonance energy transfer (FRET) should be avoided in the multiplexed biodetection. In this work,spectral analysis showed that no FRET appeared in water-soluble QDs modified by amphiphilic polymer. The immunofluorescence in vitro indicated that the QDs-IgGs bioconjugates had excellent species-specific detection ability with nearly non-specific binding. The setting of this model will help to support the application of multi-color QDs in the multiplexed bioanalysis communities.
