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Condensed Matter Physics Seminar
Time-bin entangled pairs from semiconductor quantum dots Prof. Gregor Weihs
University of Waterloo / Institute for Quantum Computing | Time | |
Thu. November 29, 2007  10:30 AM STI 501 |
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| Abstract | |
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Quantum communication and optical quantum computing require sources that
can provide special, non-classical states of light. The most important
ones are single-photon sources and sources of entangled pairs. While
pair sources based on spontaneous parametric down-conversion can provide
heralded single photons and high-quality entangled pairs their output
cannot be limited to one pair at a time. Individual self-assembled
quantum dots have proven to be excellent sources of single photons.
However, obtaining polarization entangled pairs has proved to be
difficult because of the exciton fine-structure. A different degree of
freedom, the emission time may be a better choice to prepare the
entanglement in. I will introduce the requirements that need to be met
for this entanglement and present our quantum characterization
measurements to this end. |
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